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Aim: This article attempts to present issues related to surface subsidence in areas of closed and inactive coal and lignite mines. Land reclamation is the necessity of degrading the natural environment and restoring it to its original state. Introduction: Europe is giving up fossil fuels to reduce CO2 emissions into the atmosphere. It is also a result of the embargo imposed on 24 February 2022 on the Russian Federation on coal exports to European Union countries. This results in the search for alternatives to fossil fuels in all sectors of the economy. The direction of the search is towards choosing "green energy", which, due to its potential wide application, is already being treated as an instrument of climate neutrality. Many EU countries have decided to achieve climate neutrality by 2050, which means reducing greenhouse gas emissions by approximately 95% compared to the baseline year of 1990. However, achieving climate neutrality will require eliminating emissions not only in the electricity sector, but also in other sectors. As a result of this process, further areas requiring action after the mines are closed will be created, especially in Upper Silesia. Reclamation of post-mining areas is a very difficult task because there is no universal method of planning reclamation. Many forms of environmental degradation have been observed during mining activities. Methodology: The article uses theoretical and practical research methods, including the analysis of a report on satellite methods, which was developed on the basis of data from satellite radar interferometry. The land surface movement system belongs to the group of products of the Copernicus program, which involves monitoring the land surface, and its implementation was commissioned by the European Environment Agency (EEA). Moreover, the article was based on publications by domestic and foreign authors, authorities in the field of environmental engineering. Conclusions: Methods for reducing the negative impact of mining on the environment have long been developed and improved at all stages of mining activity, from reconnaissance work to the closure of a mining plant. One of the ways to reduce the negative impact of mining on the world's environment is the recultivation of post-mining areas, thanks to which the areas transformed due to mining activities are restored to their utility or natural values. Keywords: post-mining areas, environmental degradation, reclamation, land regeneration

Mine rock dumps belong to the category of landscape technogenic neoplasms and represent a complex of anthropogenically transformed natural components. Rock dumps cause some damage to the environment due to the withdrawal of agricultural land from use, emissions of gorenje products, dust particles, flushing of pollutants, soil salinization, erosion of slopes. The main optimal measure to reduce the impact of rock dumps on the environment for Donbass is the biological reclamation of their surface. It is based on mandatory continuous environmental monitoring, which represents a set of observations of the current state and forecasting of further changes in: the state of atmospheric air, surface waters, radiation conditions, soil conditions, flora, fauna and public health in the territory of a landscape technogenic neoplasm and adjacent areas. The use of the principles of environmental monitoring will help to stabilize the landscape technogenic neoplasm as an ecosystem and contribute to the sustainable development of Donbass as an industrial region. The work carried out monitoring of the state of the green spaces of the rock dump sh. 5/6 named after. Dimitrov, located within the city of Donetsk, DPR. An inventory of green spaces and the landscaping object itself was carried out, an assessment of the effectiveness of reclamation measures was carried out, the average degree of disturbance of vegetation cover on the rock dump was determined. The results of studies of the state of the stand of a rock dump using a visual assessment scale are presented. A visual assessment of the following diagnostic signs of OCD was carried out: crown density, the presence of dead branches on the trunk and the degree of damage to the leaves by toxicants, pathogens and insects (the average area of necrosis, chlorosis and overeating).

As our crowded and warming world continues moving away from fossil fuels such as coal, we are increasingly attempting to transform the landscapes damaged by mining into beneficial, appealing and valuable new uses. The post-mining transformation involves many dilemmas, often arouses land use conflicts and can reproduce environmental injustices. In the background of conflicts are diverging preferences for post-mining land uses from the perspective of various stakeholders. This paper examines key issues and dilemmas in post-mining transformation, including terminological inconsistencies, technical reclamation versus natural succession, heritage preservation choices, authenticity concerns, and success criteria issues. The underlying question we ask is: What is the future use of the coal energy landscape; that is, what should or could come next? To address this question, we provide a comprehensive literature review and an analysis of a sample of 28 case studies of good practice projects of reclamation or regeneration (i. e., recycling) coal mining landscapes from the Czech Republic. This study is distinctive in its comprehensive scope, analyzing a diverse range of recycling projects from surface mining landscapes to urban post-mining brownfields, with extensive analysis and findings. While the criteria of transparency and legitimacy of projects are essential for applying the principles of just transition, the criteria of efficiency and sustainability prove to be key measures of success according to which differences between projects appear in the longer term. The efficiency and sustainability are significantly associated with the multifunctionality of recycled landscapes and places and seasonality of their use.

The analysis of the practice for regulating the use of dumps of soils and subsoils in the Russian Federation is carried out. It is shown that the existing regulations do not meet modern requirements for the protection and rational use of dumps of soils and subsoils. The absence of a unified recycling approach has been revealed. In some regulatory documents, dumps of soils and subsoils are considered as material for the reclamation of disturbed lands, in others – as industrial waste. Disagreement with the practice of classifying all dumps of soils and subsoils as waste of hazard classes 3–5 and subject to export to special polygons is justified. Disposal of such waste materials is administratively or criminally punishable. This approach to the material of soil excavation causes great harm to both the economy and the environment as a whole. It is proposed to change the practice of irrational use of soil and subsoil dump material and make appropriate changes to regulatory documents. One of such changes may be the introduction of the gradation “environmentally safe waste” into the documents on the definition of the hazard class of waste, with the prescription for the use of soil and subsoil dumps belonging to this category without restrictions on use in the national economy. It is proposed to clarify the magnitude of the soil thickness (soil layer) of 5 m, including the maximum depth of occurrence of fertile soil layer and potentially fertile layer. This value corresponds to the accepted stratigraphic rule on the general regularity of the structure of the sedimentary shell of the Earth. According to this point of view, soils are underlain by subsurface geological rocks, which does not imply the presence of intermediate geological layers between soils and subsurface.

Barite is one of the critically important minerals in several industries, including the fuel and energy, nuclear, and medical sectors. For decades, its extraction did not require any complex techniques; however, with the depletion of rich barite-bearing veins around the world, the circumstances have changed. While the demand for barite is growing widely, it is necessary to optimize and improve the existing methods for benefication of barite and barite-containing ores, and create new approaches to extracting this mineral, as well as develop technogenic barite deposits accumulated in large quantities during the previous ore production. Dumps and tailings often demonstrate high barite content, while new mining technologies make its extraction cost-efficient. Russian and foreign papers of the last 14 years provide data on the current state of primary and technogenic deposits, areas of barite use and the approaches employed for its benefication. Considering the expansion of the range of barite applications, the growing need for the mineral in the oil and gas industry and the difficulties in developing new barite deposits in Russia, the importance of new approaches to the enrichment of ore tailings in polymetallic deposits is revealed.

Reclamation of coal waste dumps through the establishment of a stable soil and vegetation cover on their surface contributes to the restoration of ecological systems. Therefore, studying the properties of soils in technogenic landscapes is of current importance. The problem of biological reclamation was studied in the Kizel Coal Basin area. The effectiveness of reclamation was evaluated on several sulfide coal waste dumps. The reclamation methods, as well as the period of soil-vegetation cover formation, varied. Agrochemical properties of the dump soils were studied using unified methods. The NDVI (Normalized Difference Vegetation Index) was calculated based on Sentinel-2 and Landsat 7,8 images. To assess biological activity, phytotesting was used. The lithostrats ranged from slightly acidic to neutral (рН–Н2О = 6.1–6.8); the embryonic soil showed a slightly alkaline reaction (7.9). The embryonic soil, due to the presence of coal particles, had the highest organic matter content (12–7.7%). Depending on the "age" of the soil, the amount of organic matter in the lithostrats varied: for the 7-year-old lithostrat, it ranged from 2.4 to 8.9%, while for the 4-year-old lithostrat, it was less than 1%. The absorption capacity of the lithostrats was similar to that of the background soil. The dump soils were characterized by low levels of nutrients (NPK), with the 4-year-old lithostrat having the lowest N content. The dump soils demonstrated favorable conditions for plant growth, as evidenced by the height and biomass of cress and oats. The calculated NDVI for all dumps ranged from 0.4 to 0.6, indicating the presence of a stable vegetation cover. The implemented reclamation measures proved to be effective.

The reclamation of waste rock piles (WRPs) is complex, requiring adaptation of existing mine site reclamation techniques. An alternative approach has been developed for waste rock piles reclamation which involves installing finer materials on the top of waste rock piles. These finer layers (flow control layers—FCLs) redirect water flowing inside the pile toward its slope and limits water infiltration into reactive waste rocks. In the context of sustainable development, a mixture material made with sludge and slag can be used as an FCL in the reclamation of a waste rock pile. To assess the effectiveness of this material, a physical model was used and instrumented with sensors for monitoring volumetric water content and suction and equipped with the following components: (1) a rain simulator; and (2) drains that allow the recovery of water that infiltrates through the system. The physical model was tested with various cover layer thicknesses, inclinations, and precipitation rates. Investigation results showed that the water infiltration across the system was very low, leading to the conclusion that the sludge and slug mixture performed well as a flow control layer in the reclamation of waste rock piles.

Bauxite mining, a key aluminum production process, can cause environmental degradation, soil erosion, and biodiversity loss. Reclamation measures like reforestation and water management can restore balance. Red mud, a by-product of alumina production, can enhance soil fertility and plant growth in post-bauxite mining reclamation areas. Its alkalinity and mineral composition reduce reliance on synthetic fertilizers, promoting sustainable soil management and addressing environmental challenges. This study aimed to examine the impact of red mud on soil characteristics and the growth of plants in areas during bauxite mining land reclamation. This study was conducted in the post-reclamation area of bauxite mining in West Kalimantan. The experiment involved two treatments: red mud application and a species of revegetation plant. Plant species consist of the plants Embeng, Forest Guana, Johar, and Rambutan. The study used a randomized block design with 24 experimental units. The parameters measured in the study included pH, organic carbon, nitrogen, phosphorus, exchangeable cations, cation exchange capacity, and base saturation, while growth parameters included a high percentage of plant growth and percentages of increased stem diameter. The findings showed that adding red mud to the planting hole increased soil pH and base saturation, improved nutrient availability, and enhanced plant growth in the areas post-mining bauxite at PT Antam, UBPB West Kalimantan. The Embeng Plant is highly regarded as a suitable plant species for re-vegetating areas after bauxite mining.

ABSTRACT Willows (genus Salix) are increasingly used in operational‐scale ecosystem reclamation; however, different opinions exist regarding the optimal cutting size for planting under field conditions. We compared the survival of field‐planted willow cuttings sourced from upland and lowland areas with varying diameters and lengths across two growing seasons. Cuttings were grouped into 15 size classes with different diameters (0.5, 1.0, 2.0, and 3.0 cm) and lengths (15, 30, 50, and 100 cm) and planted in groups according to their source (upland or lowland, each area potentially reflecting a different assemblage of species) within three reclaimed industrial borrow pits east of Peace River, Alberta. We considered cuttings that displayed leaf flushing as surviving individuals. Survival probability tended to be greater for larger diameter and length cuttings sourced from lowland habitats. Cutting survival was greatly reduced in year two, especially for upland‐sourced cuttings. The greater survival in larger sizes we observed may be due to greater total carbohydrates available for leaf flushing and rooting. As we did not control for species composition, the higher survival of cuttings from low‐lying areas may result from species‐specific differences among cutting sources, reflected by compositional differences we detected among surviving individuals in year two. Our findings suggest that under field settings, cuttings with > 2.0 cm diameter by 50–100 cm length sourced from low‐lying flood‐prone areas may be optimal for willow establishment. Further studies should examine the role of species and population‐level genetics in driving the upland versus lowland differences in observed willow‐cutting survival.

The Nanhui-east-tidal-flat (NETF), the largest marginal shoal in the Yangtze River of China, is significantly impacted by human activities. Prior research has not detected the presence of green macroalgae in the NETF, nor has it explored the effects of reclamation on the distribution of macroalgae. However, in 2021, a small-scale aggregated attached algal mats emerged in the NETF, potentially signaling the onset of a green tide and necessitating vigilant monitoring. Morphological and molecular biological identification analysis revealed that all collected green macroalgae were attributed to a single dominant species, Ulva prolifera, characterized by broad blades and prominent air bladders, colonizing various substrates. The attached U. prolifera exhibited continuous growth from March to May 2021, peaking at a wet weight of 373.6229 g/m² and a dry weight of 72.7904 g/m² on May 1, 2021, within the accessible sampling period. The rapid proliferation of the “opportunistic” Ulva was facilitated by high-level eutrophication and favorable environmental conditions. Furthermore, six potential germplasm sources of U. prolifera are summarized. The dominance of Ulva in the intertidal zone often indicates high eutrophication and deteriorating ecological conditions. With long-term reclamation and repeated ecological restoration projects, the intertidal vegetation is subjected to a vicious cycle of growth and destruction. Therefore, it is important to recognize that U. prolifera germplasm (macroalgae and micropropagules) will persist over the long term, and mudflats with monotonous and eutrophic habitats are highly likely to experience future large-scale algal blooms. Notably, a small-scale floating green tide was observed in the sea area near NETF in July 2023, and such concerns are not unfounded. This study conducts foundational scientific research on the attached green tide algae, a type of research that is relatively scarce in other marine areas. Most studies tend to initiate foundational research only after the outbreak of green tides, lacking early background data from the marine environment, thus rendering this study of significant reference value. Concurrently, this study emphasizes that field surveys remain an essential approach for conducting foundational scientific research on green tide algae in the NETF region, with the need to select appropriate research methods based on the occurrence and development of algal mats, as required by the situation. Importantly, this study reflects the stability of marine ecosystems as a prerequisite for modern ocean management and services, provides new perspectives on the occurrence and development of green tides, and highlights potential ecological risk factors that should be considered in the implementation of intertidal construction projects.

This study explores the formation of actor networks in developing conservation areas, specifically focusing on the Benoa Bay conservation area in Bali from 2014 to 2019. This period marks the beginning and temporary cessation of reclamation development permits in the area, instigated by a Presidential Decree. The study examines how actor networks form through material negotiations, categorizing actors into pros (supporting reclamation) and cons (opposing reclamation). It employs the Actor Network Theory (ANT) framework, particularly the moments concept developed by Callon, to analyze these networks and negotiations. The research is qualitative, using case studies and field data collected through interviews with relevant stakeholders. The primary findings reveal that actors on both sides—pro and con—form networks based on the material narratives they promote. For the pros, the need for tourism space justifies reclamation, while the cons focus on conservation values upheld by the Balinese community. The reclamation issue acts as a moment of problematization, bringing these opposing material narratives into conflict within the conservation area. The study follows ANT’s stages from problematization to mobilization, highlighting how the conflicting material narratives of both pro and con actors interact and influence the network formation. Ultimately, the research illustrates the dynamics of actor networks in the context of reclamation, showing how material negotiations shape these networks and the contestation over spatial production in Benoa Bay networks.

This study aimed to examine the changes in selected soil properties at Lítov spoil heap (Sokolov, Czech Republic) and compare the current situation with the situation described twenty years ago. A total of 110 soil samples were taken at Lítov at the same sites as in 1998. The analyses of basic soil characteristics involved: exchangeable soil pH (pHKCl), organic carbon content (Cox), quality of humic substances (A400/A600), exchangeable acidity (Ea), and two types of aluminium contents in the soil. Changes in all soil characteristics between 1998 and 2018 were statistically evaluated, compared, and visualized using Geographical Information Systems (GIS). We have observed an increase of pHKCl, Cox and a slight improvement in humus quality compared to the results from 1998. The temporal changes of soil characteristics were evident in the whole area, and the influence of reclamation methods was also pronounced. Soil development close to the regional common natural conditions was found in the area where agricultural reclamation measures (i.e., covering with topsoil) were carried out. Furthermore, afforestation - mainly by deciduous trees - supported the improvement of soil characteristics favourable for plant growth. High pyrite content and marshland were identified as the main causes that led to vegetation cover mortality.

In the process of growth and development of forest belts, some of their taxation characteristics and design change. Forest reclamation complexes are subject to homeostasis. Changing the design of shelterbelts leads to crop shortages, loss of profits for agricultural organizations, as well as to the deterioration of the ecology of field soils. A way out of this situation can be found in the application of a system of measures, an important part of which is forestry measures. The aim of the research has been to determine the timing and types of forestry measures aimed at improving the agro-ecological efficiency of protective forest reclamation complexes on agricultural lands of the Krasnodar Territory. Data from the 2019 inventory of protective forest plantations and data obtained by the authors in 2015–2021 in the Kushchevskij and Leningradskij Districts of the Krasnodar Territory have been used. According to the data obtained, graphs of the dependence of stock on the age and height have been constructed for some tree species of field protection forest reclamation complexes. It has been established that in the study area the largest number of areas of shelterbelts have a dense structure – 538.5 ha, and 501.7 ha of them are trees of the III age class. A significant increase in the stock of plantations has been noted at the age of: Robinia pseudoacacia L. – 15 years, Fraxinus excelsior L. – 25 years, Gleditsia triacanthos L. – 10 years, Ulmus pumila L. – 35 years. The equations of the regressional dependence of stock on the age and height for the main tree species have been obtained. These equations can be used to predict the timing of forestry measures in order to maintain the openwork design of forest belts recommended for the region under study.

Abstract The harmful effects of mining waste on human and ecosystem health make reclamation of former mine sites an environmental management priority. However, field-based monitoring of reclamation requires significant investments of time, labor, and money. Remote sensing offers a less expensive alternative to field-based monitoring, but work is still needed to determine which metrics can be reliably estimated using remote sensing techniques. This study uses remote sensing to examine over 20 years of reclamation efforts at Tar Creek Superfund Site and to assess revegetation after site restoration. Using the Normalized Difference Vegetation Index (NDVI), we quantify key factors affecting vegetation recovery and stability after reclamation across 123 surface mining waste cleanup locations within Tar Creek. Leveraging long-term imagery from Landsat and high-resolution PlanetScope imagery, we combine time series analysis of vegetation regrowth and landcover change detection for a comprehensive picture of recovery at each site. Across all reclamation sites, the average recovery duration was 3.5 years, and average recovery rate was 0.1 NDVI year−1. After vegetative growth had plateaued, reclaimed sites had an average NDVI of 0.70. All reclamation areas were converted from majority barren landcover to vegetated landcover classes after reclamation, and vegetative stability at reclamation sites was high (70% of reclaimed area saw continuous vegetative cover from 2017 to 2023). These results demonstrate a strong potential for multi-method remote sensing techniques in tracking and explaining vegetation recovery after reclamation and represent a cost-effective approach for real-time monitoring of reclamation progress and outcomes.

Introduction. On the one hand, polluted soils are a source of ecosystem degradation. On the other hand, it is a potential basis for the construction of structures. Construction works are constantly carried out at the sites of oil producing and oil processing enterprises. The construction of new and reconstruction of existing installations is accompanied by the demolition of old facilities up to the extraction of foundations from contaminated.Materials and methods. The assessment of oil-contaminated soils was carried out at existing enterprises of the oil complex during design and survey work to prepare sites for new construction. At the survey stage, the bearing capacity of contaminated soils was investigated using the stamp test method. The individual parameters necessary to assess the construction development of industrial sites without excavating contaminated soils were determined in a soil laboratory using standard methods.Results. The oil-contaminated soils under the sites of the reconstructed enterprises are distinguished by a variety of species composition, geomechanical properties and environmental indicators. Accordingly, the number of ways to eliminate pollution is diverse. The contaminated soils were washed with reagent solutions (flocculant, soda, carbonized water) through a network of drains and wells under pressure. At the same time, the contamination “trapped” in the pores and capillaries of the soil was transferred to a free state, followed by outflow into the drainage, interception of the contaminated liquid and its rise to the surface for subsequent cleaning.Conclusions. Taking into account the importance of the problem, the authors developed and introduced into construction practice a set of technologies that allow for the removal of hydrocarbon-containing pollutants in the territories of reconstructed and liquidated facilities of the oil complex, without extracting soils from recesses.

In small settlements, collectors for the sludge produced during water treatment processes are small-sized and located in the vicinity of drinking water storage reservoirs or in coastal areas. Sludge removal is not economical. Besides, the relief depressions formed after sludge disposal are required to be reclaimed. In ore mining regions, where the main settlements of the Urals are located, sludge produced in water treatment has high contents of heavy metals typical of ore mining provinces. Consequently, places of sludge accumulation are potential sources of water pollution. The article discusses the possibility to mix sludge with slaked lime and local overburden with the help of special equipment. So far water treatment sludge in the region has been used to reclaim the surface of solid waste landfills by creating anaerobic conditions for waste decomposition. When placed inside the embankment dams as an independent object, sludge needs to be improved for the increase of its bearing capacity and the ability to bind heavy metals. The article aims at the substantiation of the composition and properties of the reclamation material made of the water treatment sludge mixed with local overburden and slaked lime (technosoil). For this reason the paper describes the composition of the sludge in a sludge collector, the composition and properties of the overburden rocks as a component of the mixtures with water treatment sludge, the composition and properties of the mixtures of water treatment sludge with overburden rocks and Ca(OH)2 as a component dewatering sludge and neutralizing toxicants. Furthermore, the research work provides the technology created for the optimal processing of the water treatment sludge in the process of the reclamation of a sludge collector. The research results and the experience obtained in reclamation of disturbed lands in the region have confirmed the possible use of technosoil for the reclamation of small-capacity sludge collectors. The analysis of the chemical composition and physical and mechanical properties of the mixtures under study has shown that the most economical and environmentally sound reclamation material is a mixture of water treatment sludge, loose overburden dump soils and Ca(OH)2 in a ratio of 60 : 30 : 10 %.

Climate warming will lead to changes in soil properties, which in turn will affect the uptake of methane (CH4) in meadows. Currently there is artificial reclamation of alpine meadows, and the effect of reclamation on CH4 uptake in alpine meadow ecosystems is still unclear. Therefore, we investigated the effects of warming, reclamation and their interactions on soil CH4 uptake in alpine meadows on the Tibetan Plateau. From May to December 2021 and from March to May 2022, CH4 uptake was determined under four treatments: control (CK), warming, reclamation and warming under reclamation. Soil C and N nutrient contents and three enzyme activities were determined in 2021, and their effects on CH4 uptake were elucidated using the Mantel test as well as structural equation modelling. The results showed that warming significantly increased CH4 uptake by 23.84 %, reclamation significantly reduced CH4 uptake by 58.64 %, warming interacted with reclamation significantly reduced CH4 uptake by 33.45 % in growing season, and warming interacted with reclamation significantly reduced CH4 uptake by 21.46 % in the non-growing season, as compared to CK. Warming promoted CH4 uptake by increasing soil nutrient content and increasing the activities of methane monooxygenase and soil sucrase. Reclamation reduced the content of soil soluble carbon and nitrogen and inhibited the uptake of CH4. Therefore, in the context of global warming, the destruction of natural grassland should be avoided as far as possible and the area of cultivated land should be rationally planned, so as to maintain the higher CH4 uptake capacity of grassland.

Study Region: Athabasca Oil Sands Region, Alberta, Canada Study Focus: Evapotranspiration (ET) is the greatest loss of water for ecosystems in the subhumid Athabasca Oil Sands Region (AOSR), and its long-term change helps determine the ability of reconstructed boreal forests to return to a functional state following mining disturbances. This article analyzes 16 years (2008–2023) of growing season eddy covariance (EC) data from a constructed aspen-spruce-dominated boreal forest and assesses ET dynamics and energy partitioning over time. New Hydrological Insights for the Region: The findings demonstrate that (1) Evapotranspiration increased by 15 % from the early (2008–2012) to middle (2013–2017) stages of forest development and declined in the late stage (2018–2023), nearing early period rates. (2) Air temperature was the major factor controlling ET in the study forest. (3) Interannual climate variability resulted in an ET increase during wetter and warmer growing seasons with abundant precipitation and elevated air temperature, and a decline in ET during dry years with reduced precipitation and soil moisture. (4) A multi-year increase in site greenness during winter, a decline in growing season albedo, and decreased ET in later years are attributed to an increase in white spruce species on the site. This study enhances the understanding of hydrometeorological processes in the boreal forest ecosystem and emphasizes the importance of long-term observations for the successful application of reclamation strategies in the region.

Mining, an activity that dates to the earliest stages of human civilization, has played a vital role in fulfilling human requirements for an extended period of time. Nevertheless, it is worth noting that this particular activity accounts for a significant proportion, ranging from 4% to 7% of the overall world greenhouse gas emissions. These emissions mostly consist of carbon dioxide, methane, and nitrogen oxides, which are released because of fuel burning, on-site energy generation, and many other sources. The mining industry, as a constituent of industrial process and product use (IPPU) sector in Thailand, makes a substantial contribution to these emissions. Thailand is now engaged in the implementation of carbon sequestration strategies, specifically focusing on the reclamation and replanting of post-mining zones. This initiative aims to tackle the various issues associated with small-scale operations within the country’s mining sector. The objective of this study is to analyse the carbon sequestration potential of Thailand’s mining area through the utilization of satellite pictures obtained from LANDSAT 8 OLI and Geographic Information System (GIS) applications. This study assesses the present carbon storage capacity, establishes the appropriate carbon pricing, and investigates the potential for reforestation in mining areas inside the nation. Based on the findings, it is evident that the northern region of Thailand has the most substantial potential for carbon sequestration, mostly due to the presence of vegetated land. Furthermore, it is projected that the overall carbon sequestration capacity in Thailand will amount to 14.68 MtCO2e in 2023 and 28.02 MtCO2e in 2030.

In order to explore the water characteristics of soil in reclaimed coal mines in semi-arid areas and make better use of the land in reclaimed mining areas, the basic physical properties, water characteristic curves, unsaturated water conductivity and water diffusion rate of the reclaimed mining areas were selected for four types of land use after the four land use modes of reclaimed mining areas: farmland, grassland, forest land and bare land. The results showed that the soil in the reclaimed mining area was sandy soil, with the highest porosity and water content of forest land, the lowest bulk density and clay content, the highest organic matter content in cultivated land and the lowest organic matter content in bare land. The content of sand grain in bare land is relatively high, and the powder content of cultivated land, grassland and forest land is relatively high, indicating that the mechanical composition of soil in mining area can be improved by three land use methods: returning land, grassland and forest. The Van-Genuchten (V-G) model could fit the soil moisture characteristic curve in the mining area well, the coefficient of determination R2 was greater than 0.99, the gravity water of the soil capillary decreased significantly with the increase of water suction, and the water holding capacity in the suction section before 2.5 kPa was shown as cultivated land > grassland > bare land > forest land, and with the increase of suction, the water holding capacity of forest land was better than that of other land types. The water release process mainly appeared in the 0−4.8 kPa suction section, and the cultivated land had the best water release capacity and the worst forest land. Soil porosity and unsaturated water conductivity were significantly positively correlated, and the soil structure of four types of unsaturated water conductivity was the best in forest land > bare land > arable land > grassland. The soil volume moisture content and water diffusion rate conformed to the empirical formula of D(θ)=Aexp(Bθ) and changed exponentially, and the water diffusivity D(θ) increased exponentially with the soil volume moisture content θ, and R2 was greater than 0.92, and the potential water transport capacity of forest land was the best, and the water diffusion rate of bare land changed the fastest with moisture content. The research results provide theoretical and data support for land use and ecological restoration of reclaimed coal mines in semi-arid areas.

This study investigates the feasibility of utilizing drainage water for reclamation of saline and sodic soils in the Dosalagh plain of Khuzestan province, Iran. With significant drainage water generated in the region's irrigation networks, repurposing it for soil reclamation emerges is a low-risk strategy. Leaching, a practical technique for soil desalination, was examined using the double ring method at depths up to 150 cm. Four water qualities (electrical conductivities of 2.12, 7, 25 and 40 dS m−1) and depths (0, 25, 50 and 75 cm) were tested, with intermittent leaching over three cycles. Results indicate a substantial reduction in electrical conductivity (117.7 to 29 dS m−1) and sodium content (1415.9 to 39.83 mEq L−1) at the 0-25 cm depth with drainage water incorporation. The study highlights the beneficial impact on soil quality, emphasizing decreased sodium content, sodium adsorption ratio, and electrical conductivity. Overall, reusing drainage water proves advantageous for soils with high salinity levels, showcasing its potential for sustainable soil management in saline regions. This research underscores the importance of effective drainage water management for soil reclamation and agricultural sustainability in arid regions like Khuzestan province. HIGHLIGHTS Soil electrical conductivity (EC) decreased by increasing the depth of leaching water.; By increasing the depth of water in the leaching process, the amount of soil sodium and chloride decreased.; The combination of saline drainage water and non-saline river water is suitable for irrigation and reducing soil salinity.; The amount of EC reduction was more than exchangeable sodium percentage reduction.;

Integrated circuit industry is a strategic, fundamental and pilot industry that supports economic and social development. It has high water consumption and drainage. The quality characteristics of integrated circuit wastewaters were classified, including ammonia wastewater, fluorine wastewater, acid and alkali wastewater, organic wastewater, copper wastewater, and grinding wastewater. The treatment processes and technologies of up-to-standard discharge, pollutant resource recovery, and water reuse treatment of wastewater containing different pollutants were summarized. The physicochemical processes for up-to-standard discharge treatment included coagulation sedimentation, filtration and adsorption to treat fluorine-containing, copper-containing and grinding wastewater, and biochemical processes included hydrolytic acidification, internal circulation anaerobic reactor, AO, and membrane bioreactor to treat ammonia-containing and organic wastewater. Advanced oxidation and electrolysis technology received much attention in recent years. The resource recovery technologies for pollutants such as fluorine, copper and tetramethylammonium hydroxide in wastewater included ultrafiltration and electrodialysis. Wastewater reuse treatment technologies and processes included coagulation sedimentation, membrane bioreactor and filtration. Reverse osmosis was the core of wastewater reuse treatment, with the goal of producing industrial pure water for integrated circuit manufacturing. Finally, the problems faced in wastewater treatment were discussed. Corresponding control methods were suggested: improving the collection system, strengthening the removal of heavy metals and refractory organic pollutants to reduce the biological toxicity of wastewater, and using pretreatment, fouling monitoring, membrane cleaning, and developing new membrane materials methods to control reverse osmosis membrane fouling.

The characterization of compost compositions on the basis of sewage sludge and structural materials (straw, sawdust, bark) composting is described. A comparison of the methods most often used for composting and characterization of structural materials is also presented. Sewage sludge and structural materials were mixed in different ratios and composted in piles (laboratory scale) for 3 months. During this time, the composting process was controlled using standard methods. The bioavailability of some xenobiotics in an agriculture experiment (using beans) was also investigated.

Abstract The primary objective of this study was to develop soil quality indexes (SQIs) to reveal the changes in SQ during the restoration of vegetation in the reclaimed waste dumps of the Hequ open-pit coal mine. The study built an SQI evaluation model for waste dumps based on the soil management assessment framework. The total data set (TDS) consisted of nine physicochemical property indicators. The selection of the minimum data set (MDS) involved the utilization of principal component analysis (PCA) and Norm values. The SQ was comprehensively evaluated for nine indicators, taking into account the non-linear membership function and the improved Nemerow index. The findings suggested a notable disparity in the SQ between the reclaimed area and the unreclaimed area, yet the overall SQ fell short. In the TDS index system, the organic matter has the highest weight and a greater contribution to the soil quality of the waste dumps. In the MDS indicator system, the weights of organic matter and total nitrogen are both 0.5. According to Nemerow index method, the average SQIN of 5 plots is calculated to be 0.4352 ± 0.194. The average value obtained from TDS is 0.581 ± 0.236, and the average value obtained from MDS is 0.602 ± 0.351. The weighted additive method was employed to compute three SQIs, all of which yielded satisfactory outcomes. And the above evaluation methods indicate that the overall soil quality level of the waste dumps is at a moderate level. The sequence of SQ in various waste dumps was as follows: No.4lower > No.1 > No.2 > No.3 > No.4upper. Specifically, the non-linear membership function indicated that pH, available nitrogen (AN), available phosphorus (AP), surface moisture content (SMC), and bulk density (BD) were crucial in limiting SQIs in total waste dumps. The crucial limiting SQIs in unreclaimed areas were total phosphorus (TP) and total nitrogen (TN). This analysis demonstrates its efficacy in formulating strategies for the SQ evaluation and targeted soil reclamation plans of waste dumps.

The estimation of Soil Organic Carbon (SOC), Total Nitrogen (TN), and Soil Water Storage (SWS) is crucial in comprehending ecosystem services and environmental sustainability. It plays a crucial role in guiding sustainable restoration strategies and supporting the long-term health of post-mining sites. Remote sensing technology provides valuable tools for modelling and mapping soil properties in reclaimed post-mining sites efficiently and cost-effectively. This study aimed to utilize remote sensing data to estimate SOC, TN, and SWS in a reclaimed post-mining site. Field data was collected from 130 research plots to obtain reference data for SOC, TN, and SWS from the Sonica hard coal post-mine spoil heap. Remote sensing data were: airborne laser scanning (ALS) point clouds and Planets cope satellite imageries. Generalized Additive Models (GAM) were used to develop predictive models. Wall-to-wall predictions of analyzed variables were performed. The results identified topographic and remote sensing indicators that significantly influence SOC, TN, and SWS. Digital Terrain Model (DTM), aspect, and blue spectral band are variables that explain SOC storage, with a significant influence of DTM, ranging from −8 to 18 Mg ha−1. TN was explained by DTM, Canopy Height Model (CHM), blue and Near Infrared (NIR) spectral bands, and Normalized Difference Vegetation Index (NDVI), mainly influenced by NIR and NDVI, ranging from −1.1 to 0.8 and −0.9 to 1.4 Mg ha−1, respectively. The values of Topographic Wetness Index (TWI), aspect, CHM, blue and NIR spectral bands explained SWS, highlighting their importance in assessing soil water dynamics in post-mining landscapes, with TWI and CHM being particularly influential, ranging from −2 to 5.1 and −6 to 2 mm, respectively. However, caution is advised when predicting SOC and TN using remote sensing in post-mining sites due to geogenic carbon considerations.

Intensive reclamation activity has reshaped global coastal ecosystems. Soil macrofauna, an effective proxy for ecosystem health, has the potential to predict coastal reclamation ecological impact. Previous studies have primarily focused on the long-term (≥ 30 years) soil macrofaunal succession in reclaimed areas. However, composition of the soil macrofauna and its environmental drivers in newly reclaimed areas (< 30 years) remain uncertain. We selected Hengsha Dongtan in the Yangtze Estuary to conduct the study, and four different regions (reclaimed for 13, 8, 4, and 1 year, respectively) were employed to investigate soil macrofaunal composition and corresponding environmental drivers. The results showed that: (1) Terrestrial species millipedes (Paradoxosomatidae sp.), chinch bugs (Dimorphopterus spinolae), and wolf spiders (Pirata subpiraticus) were dominant. Millipedes, chinch bugs, wolf spiders, ants (Myrmecina sp.), and rove beetles (Stenus melanarius and Paederus fuscipes) were major species contributing to the average dissimilarity among regions. (2) The taxonomic composition of soil macrofauna varied over time after reclamation, which showed that the number of species, density, and biomass of soil macrofauna in region 1 (reclaimed for 13 years) was higher than that in regions 2, 3, and 4 (reclaimed for 8, 4, and 1 year). (3) The functional composition of soil macrofauna varied over time after reclamation. The number of species, density, and biomass of the phytophagous and saprophagous groups increased over time, whereas those of the predatory group decreased gradually. (4) Soil pH and total organic carbon content, together with land use, appeared to be key factors that determine soil macrofaunal composition. Overall, our study illustrates the response of soil macrofauna to changes in environmental factors and land use in newly reclaimed areas. Future studies should expand the range of potential factors and comprehensively analyze the mechanisms that maintain soil macrofaunal diversity in reclaimed areas.

In order to meet long-term air transportation needs, Hong Kong International Airport (HKIA) has been constructing the third runway system (3RS) through land reclamation projects since 2016. However, the third runway and taxiway, which were paved in September 2021, suffered from severe surface settlement. Therefore, we attempted to reveal the settlement pattern within the 3RS and analyze the factors contributing to this displacement. Employing the multi-temporal interferometric synthetic aperture radar (MT-InSAR) technique, we utilized PAZ, COSMO-SkyMed, and Sentinel-1 satellite images to extract ground displacements along the radar line of sight. The results show that, compared with COSMO-SkyMed and Sentinel-1 images, PAZ demonstrates superior performance in the deformation monitoring of the HKIA, with more deformation details and larger displacements. The maximum settlement rate derived by PAZ on the 3RS exceeds 110 mm/year. To ensure the reliability of the derived displacements along the LOS, we validated them through cross-validation, comparing the outcomes from different SAR data with data from GPS stations. In order to gain a detailed deformation information, we derived the vertical and horizontal (ground range direction) displacements by utilizing deformation measurements along the LOS of multiple SAR satellites and the geometric information, and the maximum values recorded for vertical and E-W displacements reached 88.31 mm/y and 41.91 mm/y, respectively. Furthermore, our investigation revealed that the significant local deformation observed on the taxiway and third runway was predominantly attributed to various factors including the creep of soft soil, consolidation of filling materials, characteristics of road surface materials, and distinct stages of construction.

Tin mining operations on the Jos Plateau have left a lasting impact on the environment, resulting in derelict land, mine spoils, and over a thousand abandoned mining ponds. These ponds have become potential hazards, endangering unsuspecting members of the public. This study aims to provide a comprehensive geochemical and geotechnical characterization of the mine spoils to assess their suitability for the reclamation and restoration of the degraded mined lands. The geochemical analysis reveals that the mine spoils exhibit a strong to moderate level of acidity, with a pH range of 3.91 to 5.90 (average: 4.85). Furthermore, they display deficiencies in essential nutrients such as phosphorus (average: 0.02%) and potassium (average: 0.31%), as well as trace elements such as copper (average: 19.15 ppm), manganese (average: 165.15 ppm), and zinc (average: 53.24 ppm). Notably, the mine spoils are enriched in iron (average: 6.31%). These findings highlight the inadequate presence of both micronutrient and macronutrient elements necessary for successful revegetation which is a crucial component of reclamation. Results from the geotechnical tests indicate that the mine spoils possess an average fines content of 56.03%, a mean liquid limit of 38.06%, and a mean plasticity index of 15.52%. Additionally, the average linear shrinkage value is measured at 10%. The average values for maximum dry density (MDD) and optimum moisture content (OMC) are 1.65 g/cm³ and 19%, respectively. The unsoaked California bearing ratio (CBR) averages 34.64%, while the coefficient of permeability for the spoil is approximately 1.24x10-3 mm/sec. Furthermore, the spoils average cohesion (C) was measured to be 12.150 while the mean angle of internal friction is 30.77 KN/M2. These results collectively indicate that mechanical and chemical stabilization, involving the use of lime, fly ash, and other soil-stabilizing agents is imperative for the effective reclamation of the degraded lands using the mine spoils. Such measures if adopted and implemented will mitigate the risk of accidents and drowning incidents from mining ponds and other abandoned pits involving unsuspecting members of the public and will contribute to the overall environmental restoration efforts in the Jos-Bukuru Tin Field.

Abstract Intensive resource extraction activity in the oil sands of Canada alters the quantity, structure and distribution of native ecosystems, which in turn creates substantive challenges for conservation, land management and habitat reclamation. Progressive reclamation occurs on active mine sites in the Athabasca oil sands region (AOSR) of Canada, along with concurrent assessments of reclamation effectiveness. Yet, little is known about the ability of reclaimed habitats to mitigate for the short‐ and long‐term impacts associated with open‐pit mines and provide functional habitat for wildlife. We used a robust quasi‐experiment that combined camera trap data from an observational study with an innovative occupancy model to assess the effectiveness of upland reclamation to provide habitat for wildlife in the AOSR. The dynamic occupancy models were applied to 15 years of camera trap data to assess wildlife usage patterns of nine species of wildlife over seven types of habitats. The habitats sampled ranged from mining‐disturbed habitats reclaimed to upland forest ecosites common in the region, habitats disturbed by natural (fire) and human disturbances (clear‐cut logging), with comparisons to mostly intact mature forests. Our results indicate that the nine species of wildlife assessed used habitats in a manner consistent with expectations: some preferred disturbance‐dominated habitats while others used mature forest to a higher degree. We demonstrate that the application of dynamic occupancy models to camera trap data reliably discerned these trends, providing the means to predict wildlife usage patterns in an ever‐changing landscape, including one containing bitumen extraction as a contributor to landscape‐level modifications. Practical implication: Our work illustrates how continued monitoring of wildlife using camera traps contributes to assessments of reclamation effectiveness with respect to wildlife occurrence, distribution and usage patterns in anthropogenically and naturally disturbed landscapes. Evaluating the effectiveness of reclamation is especially important given the expected increase in habitat reclamation on active oil sands mines over the next several decades, coupled with the need to ensure that disturbed habitats regain ecological function able to sustain wildlife in the future.

The study of the effect of mulching to establish vegetation cover at industrial sites is promising and relevant in terms of environmental restoration and reduction of environmental risks in the area of influence of industrial facilities. The study aims to investigate and evaluate the effectiveness of mulching and sowing seed mixtures as a method of establishing vegetation cover at ash and slag dumps of thermal power plants. To conduct the study, the soil cover of ash and slag dumps was assessed, and experimental plots were laid out for mulching and sowing seed mixtures. The study revealed that ash and slag dumps ecotopes are characterised by a high concentration of pollutants, namely heavy metals, which makes it difficult for vegetation to grow there. In the course of studying the ecological features of the ecotopes and phytodiversity of the territory, a list of species of native flora for seed mixtures was proposed. Mulching was done on the experimental plots and seed mixtures were sown. Mulching has proven to be an effective method for accelerating the processes of natural regeneration of vegetation in areas affected by anthropogenic impact. The results of the study can be used in practice by ecologists, environmental organisations, and a wide range of specialists to develop and implement measures to restore the ecological balance of degraded and technologically transformed ecosystems

Background and Objectives: Humanity’s gravest issue is environmental pollution, the main source of illness and death in humans and animals. The rapid exploitation of natural resources, urban effluents, and growing industrial waste result from the industrial and technological revolution, resulting in pollution. In the last few decades, the conventional technologies and processes used to remove the contaminants have typically been ineffective, expensive and harmful to the environment. Methods: The study’s available resources were compiled from internationally recognized scientific databases. Results: The use of phytoremediation for sustainable recovery of areas contaminated with toxic heavy metals has gained higher status since the discovery of hyper-accumulator plants. Numerous species of aquatic plants are effective in removing organic and inorganic pollutants. However, choosing plant species is of primary importance for successful phytoremediation. Other novel approaches, like different bio-absorbents and their modified versions, such as nano-composites and carbonaceous materials, might also be helpful for the sequestration of heavy metals in soil. Conclusion: The microbiological adsorbents and modified agriculture biomass composites effectively render heavy metals inert in soil and water with greater performance, stability, and reusability. The modified composites encapsulated bio-absorbents for cleaning up contaminated water and soil can be a better alternative and must be explored for future use.

Tailing land reclamation aims to improve the environment so that the tailing areas become productive for crop cultivation. The research was carried out in the tailings area of Mile 21.5 Timika from March to September 2022. The research aimed to study the dosage levels of Pistia stratiotes composts as an ameliorant to support the growth and yield of chili cultivated in the fresh tailings area. This study was laid out in a randomized block design with the Pistia stratiotes compost as a treatment, which consisted of PS1 = 1 kg/plant, PS2 = 2 kg/plant, PS3 = 3 kg/plant, and PS4 = 4 kg/plant in 6 replications. Based on the results, there was a significant effect of Pistia stratiotes compost on the growth and yields of chili. PS4 treatment produced the highest growth (plant height and leaf number) and highest yields (fruit number/plant, fruit weight/plant, fruit weight/plot, fruit weight/ha), while PS1 produced the lowest growth and yields. Chili produced 4.19 t/ha by PS4, indicating a high yield potential when tailings turned into a more stable growth media over time. There was a significant correlation between plant height and leaf number with the fruit weight. This shows that the vegetative growth component is closely related to increased chili yields. The high heritability value indicates the genetic factor influenced the growth and yields of chili more than the environmental factors. The metal contents in the chili fruit tissue are below the threshold level. The findings of this study emphasized the appropriate reclamation approaches using Pistia stratiotes compost as an ameliorant, which effectively improves the quality of tailing as growing media to maximize chili yields.

In the paper, changes of pH value during 20 days of soil interaction with the solution have been traced. Differences in the reaction rate using ameliorants of different chemical nature for liming have been established. It was revealed that the ameliorative effect of using materials of silicate nature in the experiment was lower than that of carbonate nature. According to the effect all ameliorants used in the experiment can be arranged in the following descending order: dolomite flour (DF), crushed stone sieve (CSS) > conversion chalk (CC), dolomitized limestone flour (DLF) > blast furnace slag (BFS) > oil shale ash (OSA). For all lime fertilizers empirical models of pHKCL value change over the whole experimental interval were developed. Clustering of separate variants of the experiment, produced by different ameliorants on their influence on the index rNKCL on the whole interval of study was carried out.

Surface mining involving quarrying of rocks often causes significant landscape alteration, culminating in a range of environmental effects from aesthetics to ecosystem disturbances if not properly managed. This study focused on the assessment of the geo-spatial changes in landscape of a marble deposit occasioned by quarrying in Ikpesi, Akoko-Edo, Edo State, Nigeria with the aim of future reclamation. Aerial mapping of the quarry and its contiguous vegetated land was carried out using an unmanned vehicle (UAV) DJI Phantom 4 drone. Images captured were uploaded to the cloud and processed by DroneDeploy software to generate the digital surface models-orthomosaics of the quarry and its adjoining land as well as the elevation Heatmaps, the pits cut/fill of the quarry and the Plant health map. The results show that a significant landmass of the quarry has been affected due to excavation of materials. The total area of land worked by the Quarry was (40,400 m2 ), the total cut (106,469.6 m3 ) and fill of (124,708.5 m3 ) with a net fill volume of (-18,238.84 m3 ). In order to avoid material deficit for reclamation in the long run, critical planning for "quarry waste materials" management is needed to ensure ultimate reclamation to an acceptable topographical level.

Salt marshes are declining due to the dual pressures of coastal erosion and land reclamation. However, there remains a lack of quantitative analysis regarding this reduction process and its driving mechanisms. This study examines the dynamics and influencing factors of salt marsh vegetation along the eroding coastline of Sheyang County, Jiangsu Province, China, between 1985 and 2020, using remote sensing to analyze changes in artificial coastlines, water boundaries, vegetation front edge, and its topography. Our results showed an extensive seaward movement of artificial coastlines due to reclamation, coupled with severe reductions in salt marsh area and width. Coastal erosion further caused a 10.5% decline in vegetation elevation and a 46.7% increase in slope steepness, amplifying vulnerability to wave action. Native species were largely replaced by Spartina alterniflora, reducing ecological diversity. Currently, human pressure on the landward side has been alleviated; thus, addressing coastal erosion is vital to preventing the further loss of salt marshes. Sediment retention engineering and native vegetation restoration efforts can gradually facilitate the recovery of salt marshes. This study provided critical insights for sustainable coastal management under bidirectional pressures.

The construction, demolition, and renovation industries are among the largest contributors to global carbon emissions and waste. With decreased landfill capacities, increased waste diversion targets, resource shortages, and the recognition that material waste is critical to climate change, diverting demolition waste is now a significant priority in waste management. Deconstructing a structure and reusing its building components can significantly reduce the environmental burdens imposed. However, to optimize the reuse of building materials and components for their environmental, societal, and economical benefits, the reclamation procedure must be undertaken in a more rational and robust manner. There are currently gaps in frameworks and tools that involve the assessment of reusable building components in demolition projects. This paper develops a reclamation framework to assess the viability of recovering and reusing building components. The framework first describes a process for conducting a technical audit and uses an assessment tool to suggest a level of deconstruction based on the physical parameters of the building circumstances. The framework complements this initial outcome by then assessing additional comprehensive parameters, such as the cost, the heritage value, and the available timeframe to arrive at a suggested outcome of actions, which can range from complete demolition and basic material recovery to deliberately removing salvageable items. The framework is then applied to an older, detached office building as a conceptual case study for demonstration. The recommended level of deconstruction appears appropriate based on the visual assessment of the structure. The result of this paper promotes the circular economy and supports the United Nations Sustainable Development Goals (UN SDGs) by presenting a notably more insightful and guided approach to capturing deconstruction waste.

Tidal bore dynamics in estuarine environments are influenced by both natural hydrological changes and human activities, such as coastal reclamation. This study focuses on the Qiantang River estuary, assessing the impacts of runoff variations and reclamation on tidal bores over the past five decades. By employing statistical and time-frequency methods, including the Mann–Kendall test, ordered clustering, and wavelet analysis, the relationships between tidal bore height, river discharge, and reclamation activities are examined. The results indicate that increased freshwater discharge reduces bore intensity over short timescales of 0.3 to 1.2 years, while decreased runoff amplifies it. Over longer periods of 4.1 to 8.3 years, a positive correlation emerges, with changes in runoff preceding variations in tidal bore height. Coastal reclamation, particularly the narrowing of channels, has significantly reduced the bore height at Yanguan, especially in the years following the 2000s. Additionally, the long-term interactions of other factors influencing tidal bores are explored. These findings reveal a delayed estuarine response to human modifications, highlighting the necessity of long-term monitoring and adaptive management strategies to mitigate these impacts. The study provides valuable insights into the complex interplay of natural and human factors, offering guidance for future estuarine management and conservation efforts.

Coastal changes in China, notably in the Zhoushan Islands, have primarily been driven by coastal reclamation since the establishment of New China. This study conducted a comprehensive analysis of the Zhoushan Archipelago shoreline spanning four decades, employing remote sensing, aerial photographs, and shoreline data since 1984, along with GIS (Geographic Information System) technology. We assessed shoreline changes using the shoreline change index and shoreline artificialization index, as well as examined the influence of the Yangtze River’s suspended sediment and impoldering activities on Zhoushan’s shoreline. Furthermore, the correlation between local economic development and shoreline development was explored. The results revealed the following key findings: (1) From 1984 to 2018, the Zhoushan Archipelago shoreline decreased by 7.05 km. Temporally, the shoreline change index was −0.08%, with the most significant reduction occurring between 2008 and 2018. Spatially, differences among island groups were not pronounced. (2) The shoreline diversity index consistently increased, indicating greater diversity and complexity in shoreline use over the four decades. (3) The shoreline artificiality index steadily rose, particularly after 2000. It was highest in the south, followed by the center, and lowest in the north. (4) The intensity index of coastal land use continuously increased, with the southern island group having a higher index compared to the Zhoushan Islands. (5) The Yangtze River contributed significantly to sand inflow, influencing shoreline changes and beach shaping in Zhejiang. However, reclamation projects were identified as the primary and direct factor. (6) A positive correlation existed between Zhoushan City’s economic development and the intensity of coastal land use. This study emphasized the need for improving the control over reclamation projects and the better management of coastal protection and use. These measures could optimize resource allocation and establish a more scientific and rational coastal zone pattern.

Monitoring reclaimed landfills is essential for ensuring their stability and monitoring the regularity of facility settlement. Insufficient recognition of the magnitude and directions of these changes can lead to serious damage to the body of the landfill (landslides, sinkholes) and, consequently, threaten the environment and the life and health of people near landfills. This study focuses on using UAV photogrammetry to monitor geometric changes in reclaimed landfills. This approach highlights the advantages of UAVs in expanding the monitoring and providing precise information critical for decision-making in the reclamation process. This study presents the result of annual photogrammetry measurements at the Słabomierz–Krzyżówka reclaimed landfill, located in the central part of Poland. The Multiscale Model to Model Cloud Comparison (M3C2) algorithm was used to determine deformation at the landfill. The results were simultaneously compared with the landfill’s reference (angular–linear) measurements. The mean vertical displacement error determined by the photogrammetric method was ±2.3 cm. The results showed that, with an appropriate measurement methodology, it is possible to decide on changes in geometry reliably. The collected 3D data also gives the possibility to improve the decision-making process related to repairing damage or determining the reclamation direction of the landfill, as well as preparing further development plans.

The research presents the problem of liquidation of dumps of substandard raw materials of zeolite-containing rocks of the Holinsky deposit, measures for the reclamation of disturbed lands. The most effective way to restore ecosystems is renaturation. Time intervals of succession are considered. Renaturation of disturbed lands consists of 6 stages. Possible dominant plants for the proposed options are considered in detail: Stipa lessingiana, Poa platensis, Festuca valesiaca, Poa angustifolia, Elytrigia intermedia, Artemisia vulgaris, Trifolium pratense , Trifolium repens, Agropyron desertorum.

Introduction: Continuous development in a country automatically makes the country lack vacant land, and reclamation is one way to overcome this problem. Reclamation in its implementation has not been regulated in detail in the 1982 UNLCOS so it can cause problems in the future, such as what happened in the South China Sea where China carried out reclamation in the Spratly archipelago. Purposes of the Research: To find out and analyze reclamation arrangements in the 1982 UNCLOS and the impact of reclamation laws carried out by countries in terms of the 1982 UNCLOS. Methods of the Research: This study uses a normative juridical research type. By using the statutory approach, case approach, and conceptual approach. Management and analysis of legal material in this study use qualitative analysis. Results of the Research: The results showed that the 1982 UNCLOS did not regulate coastal reclamation, but there were several articles in the 1982 UNCLOS that related to coastal reclamation and could be used as a basis, namely Article 11, Article 12, Article 56, and Article 60. The impact of reclamation for the delimitation of sea areas between countries is that the state will take its own way of understanding and interpreting the contents of the convention for its own benefit, one of which is to carry out reclamation which can lead to delimitation disputes, especially in areas where an agreement on territorial boundaries has not been established as happened in reclamation disputes in the Spratly Islands. in the South China Sea by China.

The contamination of natural ecosystems with heavy metals and metalloids (HMMs) primarily results from anthropogenic activities. Consequently, ongoing efforts are dedicated to the development of technologies aimed at restraining the mobility of HMMs and expediting chemical reactions that convert pollutants from mobile to immobile states. Addressing the reclamation issue always necessitates the selection of the most promising and effective type of reclamation work, as well as justification of land prioritization for reclamation purposes. In terms of performance and future potential, the sorbent-oriented approach, grounded in the concept of “green” utilization of man-made waste as a raw material for creating novel composite sorbents, is gaining traction for land reclamation in disturbed areas. In international practice, diverse environmental risk assessment methods are employed to substantiate the necessity for and prioritize reclamation efforts. The aim of the present study is to evaluate established conventional methods for assessing the risks associated with environmental harm. Additionally, this research aims to assess the efficacy and ecological compatibility of the composite sorbents developed by the author. This evaluation will be conducted by assessing and comparing the levels of potential environmental risks or risks of environmental damage subsequent to the application of these sorbents. The objectives of this study are as follows: 1) to explore the theoretical aspects of HMMs: including the formulation of a definition, investigation onto the origins of HMMs, examination of HMMs’ toxicity, and identification of prevalent methods for evaluating the environmental risks associated with HMMs; 2) to evaluate the effectiveness of established methods for assessing the environmental risks posed by HMMs; 3) to assess the efficacy and environmental sustainability of the composite sorbents developed by the author. This evaluation will involve an examination and comparison of the levels of potential environmental risks and the risks of environmental damage subsequent to the a pplication of these sorbents. The research subject: the mining allotment within the Levikhinskoye mine (classified as an environmental disaster site) is investigated as a disturbed land ecosystem, encompassing industrial waste dumps containing HMMs. The research hypothesis aims to establish the viability of “green” waste utilization from industrial sources as a raw material for composite sorbents used in land reclamation, without escalating the environmental damage. The conducted experiments revealed that sorbents composed of peat/water treatment sludge (at a ratio of 20/80 wt. % with natural moisture content) and peat/diatomite/water treatment sludge (at a ratio of 5/15/80 wt. % with natural moisture content) exhibited the highest level of performance, surpassing an overall efficiency of 89%. A sorbent composed of peat/diatomite (at a ratio of 25/75 wt. % with natural moisture content) demonstrated an overall efficiency of 67.7%. The estimated environmental risks (ER and ED) after the application of the proprietary composite sorbents, which include water treatment sludge, exhibited an average reduction of 89.5% and 88%, respectively.

Le pouvoir d'interpréter la loi appartient à celui qui a légiféré. C'est pour cette raison que les lois doivent être claires pour ne pas donner lieu à interprétation.

The indigenous communities of Canada have transmitted their traditional knowledge of survival from one generation to another through oral storytelling sessions since the pre-colonial times. This knowledge has remained encapsulated within their collective communal memory in the form of stories of ancestors, tales of tricksters, dream-vision narratives, ceremonial songs, and ritualistic recitals. But forces of Euro-Canadian colonization have encroached upon their right to autonomy through a coercive imposition of the colonizers' language (English) and the colonizers' medium of expression (writing) upon them. The starkly different consciousness of ‘history’ that governs the worldviews of the dominant and the dominated have only served to aggravate the imbalance of power even more. The late twentieth century has seen the literary productions of these communities’ strife to reclaim their cultural and thereby political autonomy by inscribing the ‘oral’ within the ‘written’ and reworking the semiotics of the foreign tongue, imposed upon them to incorporate the specific nuances of their traditional language-culture within it. By looking into Ravensong (1993) and Whispering in Shadows (2000) penned by writer-activists Lee Maracle (Salish) and Jeannette Armstrong (Okanagan) respectively, this paper aims to explore the subversive potential of this collective cultural memory in resisting the colonial atrocities, the erosion of identity and the political disempowerment that has plagued the Native-Canadian existence for centuries.

Abstract Illegal mining is one of the problems in natural resource management in Indonesia. The enactment of Law Number 3 of 2020 concerning the Amendment to Law Number 4/2009 concerning Mineral and Coal Mining (UU No. 4/2009) further strengthens the concept of ecosystem protection, one of which is through reclamation and post-mining obligations. However, in the current law, there is confusion regarding the assignment of reclamation responsibility. The purpose of this paper is to examine how the concept of legal responsibility for illegal mining, and provide justification or consideration of the urgency of reclamation responsibility for illegal mining. This research employed a normative method and statutory, case, and conceptual approaches. The results of the study indicate that there is a legal vacuum in the current mining regulations regarding reclamation responsibility for illegal mining. The concept of responsibility for reclamation in Law no. 3/2020 is only charged to legal mining but does not cover illegal mining, causing many mine pits to be left unattended, and this situation has claimed many lives. Parties involved in Illegal mining in Indonesia should not only be burdened with liability but also environmental obligations or responsibilities in the form of reclamation and post-mining from illegal mining activities carried out. The first thing that can be done by the Government is to amend Law No. 3/2020 by expanding the concept of recovery responsibility to ensure that it can cover illegal mining. The imposition of reclamation responsibility for illegal mining is expected to provide maximum recovery for the ecosystem around the former mine. Abstrak Pertambangan ilegal merupakan salah satu masalah dalam pengelolaan sumber daya alam di Indonesia. Lahirnya Undang-Undang Nomor 3 Tahun 2020 tentang Perubahan Atas Undang- Pertambangan Mineral dan Batubara sebelumnya (UU No. 4/2009) semakin memperkuat konsep perlindungan ekosistem salah satunya melalui kewajiban reklamasi dan pasca tambang. Akan tetapi, dalam aturan hukum saat ini terdapat kerancuan mengenai pembebanan tanggung jawab reklamasi. Tujuan penulisan ini adalah untuk mengkaji bagaimana konsep pertanggungjawaban hukum pertambangan ilegal, dan memberikan justifikasi atau pertimbangan urgensi tanggung jawab reklamasi untuk pertambangan ilegal. Metode penelitian dalam penelitian ini adalah penelitian normatif dengan pendekatan perundang-undangan, pendekatan kasus, dan konseptual. Hasil penelitian menunjukkan bahwa terdapat kekosongan hukum (legal vacuum) dalam aturan pertambangan saat ini mengenai tanggung jawab reklamasi bagi pertambangan ilegal. Konsep tanggung jawab reklamasi dalam UU No. 3/2020 hanya dibebankan kepada pertambangan legal namun tidak menjangkau pertambangan ilegal. Hal ini menyebabkan banyak lubang tambang yang dibiarkan yang merenggut banyak korban jiwa. Pelaku pertambangan ilegal di Indonesia seharusnya tidak hanya dibebani tanggung jawab pidana, melainkan kewajiban atau tanggung jawab lingkungan dalam bentuk reklamasi dan pasca tambang dari kegiatan tambang ilegal yang dilakukan. Hal pertama yang dapat dilakukan oleh Pemerintah adalah melakukan perubahan terhadap UU No. 3/2020 dengan memperluas konsep tanggung jawab pemulihan sehingga dapat juga menjangkau pertambangan ilegal. Pembebanan tanggung jawab reklamasi bagi pertambangan ilegal ini diharapkan dapat memberikan pemulihan yang maksimal bagi ekosistem sekitar bekas tambang.

Mount Semeru eruption in 2020 and 2021 damaged 851 ha of productive land. Restoration of the affected lands requires information such as wide area, distribution, and eruption material characteristics. This community service aimed to provide a database as an overview of pyroclastic materials characteristics and elucidate potential-and-adaptive plants and microbes on post-Mt. Semeru eruptions. The volcanic ash contains significant elements (Al, Si, K, Ca, Ti, and Fe) and minor elements (V, Cr, Mn, Cu, Zn, Sr, Ba, Eu, and Re). Some of the plants that have survived post-eruption are annual shrubs and herbaceous plants such as grasses, so these plants can be used to restore the affected lands fertility after the Mt Semeru eruption. Based on economic evaluation and conditions in the field, the recommended adaptive plants are Pennisetum puparium and Musa paradisiaca. Both plants provide economic benefits for animal feed and farmers' income during post-eruption land recovery.

This is an essay in the field of mining engineering. Copper tailings are mainly concentrated in east China, southwest China and central South China, which are stored in dry dumps or wet discharge in tailings pond. The lack of multi-gradient and multi-direction utilization mode, brings great threat to the environment and safety around the mining area. It is an important measure to ensure the safety of resources and environment in mining area to strengthen the technical research on the utilization of domestic copper mine tailings and realize its large-scale consumption. This paper introduces the general situation and distribution of copper mine tailings resources, summarizes the utilization status of copper mine tailings in valuable element recovery, building materials, filling, reclamation and other aspects, and discusses the existing problems in the utilization of copper mine tailings resources and gives a prospect of reasonable development and utilization, providing a reference for further research and application of copper mine tailings resources.

Harnessing energy from descending greywater (GW) in tall buildings (TBs) is an innovative concept that combines water management with renewable energy generation and applying simulation methods. This study proposes a novel approach to enhancing sustainable energy recovery in TBs by capitalizing on the kinetic energy inherent in descending GW. Greywater, derived from non-toilet fixtures such as showers, bathroom sinks, and washing machines, offers a readily accessible source of potential energy due to its gravity-driven flow through the plumbing system. This gravitational potential energy could feasibly be converted into useable electricity through the incorporation of specialized energy-recovery mechanisms, such as turbines, hydroelectric generators, and piezoelectric devices. The study addresses the technical, economic and environmental aspects of implementing this idea in TBs. It describes the challenges of system integration, maintenance requirements and adherence to regulatory standards, as well as the potential benefits in terms of water conservation and reduced reliance on conventional energy sources, through a comprehensive analysis encompassing modeling, experimental validation and feasibility assessments. The research offers insights into the potential viability of harnessing downward-flowing GW as an alternative and sustainable green energy resource.