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Copyright of Acta Zoologica Lilloana is the property of Fundacion Miguel Lillo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Casa de Piedra Tourist Villa is the youngest town in the country and its foundation is associated to the proximity of a dam inaugurated in 1996 in the middle course of the Colorado River. In this way, the development of an artificial lake led to productive projects dependent on irrigation and a residential and commercial area with tourist purposes. However, it was not possible to materialize all the proposals promoted by the provincial government. Consequently, as part of a research project of the POIRE of the UNLPam, an interdisciplinary study was carried out in order to determine if the environmental issues generated, especially from 2019, have had local consequences. To this end, official statistics analysis, comparisons with sanitary parameters, field surveys, impact identification studies, and interviews with key informants were carried out. As a conclusion, it was confirmed that the modification of the multipurpose plans drawn up by the provincial government in 2006 is based on the historical downspout of the river and other factors of a regional or local nature, including salinization and pollution. They worsen the water problem and affect living conditions. Therefore, some political decisions should be reconsidered in terms of territorial planning and management. [ABSTRACT FROM AUTHOR]

In the last decades and as a result of the rapid transformation of the terrestrial ecosystems, a new category called 'neo-ecosystems' has emerged. In the dry plains of Argentina, the agricultural expansion replacing forests, woodlands and natural grasslands has generated water surpluses at the regional scale. This water excess has favoured the development of neo-wetlands characterized by shallow water tables, frequent waterlogging and progressive salinization. In this work, we characterize these neo-ecosystems that spontaneously occupy these degraded environments by reviewing bibliography in the Dry Chaco-Espinal area and by taking the El Morro basin in the province of San Luis as a case of study. Through a temporal analysis of high-resolution images, we found that in the last 13 years, the neo-wetlands of the El Morro basin have tripled their extension, covering more than 15% of the lower basin, mainly in depressed areas of the landscape where salinization has been more widespread. These neo-wetlands showed lower NDVI-LANDSAT values than the surrounding forests (0.44±0.04 vs 0.35±0.09) but similar to the annual crops (neo-wetlands 0.35±0.09 and crops 0.37±0.13). Compared to the crops, the neo-wetlands presented longer growing seasons (241±54 days vs. 194±54 days, for neo-wetlands and crops, respectively), showing revegetation with saline tolerant species adapted to the new environment. Finally, we propose guidelines for the restoration and use of these neo-ecosystems in order to recover their functionality but also their ecological-productive value. [ABSTRACT FROM AUTHOR]

Copyright of Tecnología y Ciencias del Agua is the property of Instituto Mexicano de Tecnologia del Agua (IMTA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The use of nearby electromagnetic induction (EMI) sensors is of great interest in the studies of the physicochemical properties of soils used in agriculture. The objective of this work was to evaluate the efficiency of an EMI sensor in determining the horizontal and vertical distribution of soil properties. It was determined the measurement mode or operation that allows relating the apparent electrical conductivity (ECa) of the soil with the edaphic properties with greater accuracy and the depth distribution of the electrical conductivity (EC) of the soil was determined by implementing the 1D inversion method. The ECa surveys were conducted in the field by EMI at three sites: two along transects (sites 1 and 2) and another in an area of a plot under irrigation (site 3). Correlations between ECa and some soil properties were analyzed, and EC maps were made with the models obtained from 1D inversions in transects. The best orientation mode for the instrument was determined to be horizontal. At site 1, ECa was correlated with nitrate content (r= 0.67) and with laboratory-measured soil EC (ECs) (r= 0.69). On the other hand, at site 2, ECa was correlated with volumetric humidity (r= 0.91). At site 3, a high correlation was observed between ECa and pH (r= 0.88), ECs (r= 0.87), percentage of exchangeable sodium (r= 0.91) and sodium content (r= 0.91). The variability of the ECa explained the content of salts and the degree of sodicity of the soil. The ECa modeling allowed the identification of areas or environments with different ranges in soil properties related to salinization and sodification as a consequence of the application of complementary irrigation. [ABSTRACT FROM AUTHOR]

Copyright of Boletín Geológico y Minero is the property of Instituto Tecnologico Geominero De Espana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Caldasia is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

It is possible to use halophilic bacteria isolated from saline environments as a possible alternative for the rehabilitation of salinated soils for agricultural and agricultural production. Six halophilic bacteria were evaluated to determine their potential in the reduction of the electrical conductivity (Ce) of moderately saline soil in the municipality of Sáchica-Boyacá (Colombia). The bacteria were isolated on nutritive agar with different concentrations of NaCl, then inoculated in the soil (3 kg placed in pots) to perform a bioassay in the greenhouse for 2 months. Two phases were carried out, the first until obtaining a value of 2 ds / m (Ce) in order to plant tomato plants in the second phase. Weekly measurements of the (Ce) were made throughout the bioassay and only in phase 2 were determined weekly qualitative variables of tomato growth (height, number of leaves, foliar area, wilting and chlorosis). The results showed a direct effect of the halophilic bacteria in the decrease of the (Ce) of the soil, going from 5.2 to 0.8 ds / m (T1), 0.7 ds / m (T2), 0.8 ds / m (T3), 0.6 ds / m (T4), 0.7 ds / m (T5), 0.7 ds / m (T6), 3.0 ds / m (Control), values that correspond to very light salinity (< 2 ds / m). Regarding the agronomic variables, improvements were observed in the characteristics evaluated in comparison with the absolute control, especially in height and number of leaves of the plants. For the absolute control 80% of the experimental units were lost, while in the soil with the different treatments only in some cases 20% was lost. Accordingly, it is evident that the halophilic bacteria used in this research have potential for the rehabilitation of salinated soils. [ABSTRACT FROM AUTHOR]

Copyright of BIOAGRO is the property of Revista BIOAGRO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of this study was to evaluate the incidence of different combinations of irrigation water (demineralized and artificially salinized in the laboratory) on the electrical conductivity (EC), sodium adsorption ratio (SAR), pH, exchangeable sodium percentage (ESP), and percent base saturation of two petrocalcic Paleudolls of Argentina. An experiment was conducted in a greenhouse, where 30-cm long soil columns were seeded with perennial ryegrass (Lolium perenne). Five water treatments were established: W 0 (100% distilled water), W 1 (30% water with low RAS and 70% distilled water), W 2 (50% water of low SAR and 50% distilled water), W 3 (30% water of high RAS and 70% distilled water), and W 4 (50% water with high RAS and 50% distilled water). Since the artificially salinized water proportion was greater than the demineralized water, the EC and ESP values increased mainly at the surface (0-10 cm). The artificial water SAR=12.5 produced a significant increase in ESP=19.8 compared with the control treatment. Considering the dilution effect of rain, an equation was developed to estimate the value of soil RAS for a given quality of irrigation water value. [ABSTRACT FROM AUTHOR]

The deltas of the Mediterranean present a great geographical, morphological, hydrological, socioeconomic and environmental diversity, but they have some common problems. In this article the characteristics of the salinization and penetration of the salt wedge in the Ebro's delta are shown. It is described the formation and dynamics of the salt wedge and the necessity of mitigating their effects. It is proposed the construction of a saltwater barrier, near the mouth of the river [ABSTRACT FROM AUTHOR]

Copyright of Hydrogeology Journal is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of BIOAGRO is the property of Revista BIOAGRO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of BIOAGRO is the property of Revista BIOAGRO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Hydrogeochemical techniques provide a complementary tool to hydrogeology as they provide certainty as to the questions related to complex systems, as is the case of coastal aquifers, in which salinity, usually associated to saline intrusion processes, may result from the fusion with other hydroclimatologic and hydrodynamic aspects. With the application of hydrogeochemistry and ionic relations, it has been evidenced that salinization processes in the coastal aquifer of Urabá Banana Axis could be linked to water - rock interaction, to mixtures with waters which salinized as a result of old transgression-regression processes in the zone under study. This article summarizes the results of the research project, the application of hydrogeochemistry, and ionic relations as a valid methodology to determine the different salinization processes of coastal areas. [ABSTRACT FROM AUTHOR]

The use of ground water for complementary irrigation may produce salinization and/or modification of soils.The objective of the research was to evaluate soil salinization and sodification risks by complementary irrigation on the basis of the study of groundwater mineralization, depth of aquifers and physico-chemical properties of soils.The aquifer properties obtained from previous geophysical studies were evaluated and a soil sampling was performed analysing the variability and spatial distribution of their physico-chemical properties, by means of geostatistical methods. The electrical conductivity of free groundwater (ECf) showed greater values than the deeper levels of the Pampeano aquifer with a direction of ground water flow NE-SE. This aquifer presented a trend of decrease of their conductivity from west to east. Soil properties such as content of K, Mg, Na, pH, ESP (exchangeable sodium percentage) and electrical conductivity ECs, showed spatial correlation, while P (extractable phosphorus), C (organic carbon), CEC cation exchange capacity). Ca (calcium) indicated high variability for the sampling scale used. Some deterioration on soils was delected due to the decrease in concentration of K in all the soil series at the study zone, and in a lesser scale the content of Ca and Mg. Topography represented a great part of the ECs variability, lacking any clear influence of the EC, and the depth of water table. The economically productive agricultural zone did not show any severe risk of salinization and sodification of soils by the application of complementary irrigation. [ABSTRACT FROM AUTHOR]

Among the most important natural resources, and contradictory the less abundant, the water occupies the first place for being it a source of life. Its conservation and preservation is of a great importance for humanity. The phenomenon of sea water encroachment, common in karstic aquifers, intensifies naturally or artificially according to the precipitation regime, an unbalanced relationship between precipitation and recharge or because the human activity causing the loss of the natural water quality. It is of a great interest the study of this process with the purpose of its better understanding. Guane Watershed is located in the Western part of Cuba and occupies an area of 1 253 km². It has a certain degree of salinization from the hydrogeological point of view with a variable behaviour in the mix zone. New reported data about redox potential and dissolved oxygen is also presented in this paper. [ABSTRACT FROM AUTHOR]