6 results on '"Zhaoli Wang"'
Search Results
2. Climate and landuse change enhance spatio-temporal variability of Dongjiang river flow and ammonia nitrogen
- Author
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Jie Jiang, Zhaoli Wang, Chengguang Lai, Xushu Wu, and Xiaohong Chen
- Subjects
Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
3. Integrating the Social, Hydrological and Ecological Dimensions of Freshwater Health: The Freshwater Health Index
- Author
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Derek Vollmer, Kashif Shaad, Nicholas J Souter, Tracy Farrell, David Dudgeon, Caroline A Sullivan, Isabelle Fauconnier, Glen M MacDonald, Matthew P McCartney, Alison G Power, Amy McNally, Sandy J Andelman, Timothy Capon, Naresh Devineni, Chusit Apirumanekul, Cho Nam Ng, M Rebecca Shaw, Raymond Yu Wang, Chengguang Lai, Zhaoli Wang, and Helen M Regan
- Subjects
Earth Resources And Remote Sensing - Abstract
Degradation of freshwater ecosystems and the services they provide is a primary cause of increasing water insecurity, raising the need for integrated solutions to freshwater management. While methods for characterizing the multi-faceted challenges of managing freshwater ecosystems abound, they tend to emphasize either social or ecological dimensions and fall short of being truly integrative. This paper suggests that management for sustainability of freshwater systems needs to consider the linkages between human water uses, freshwater ecosystems and governance. We present a conceptualization of freshwater resources as part of an integrated social-ecological system and propose a set of corresponding indicators to monitor freshwater ecosystem health and to highlight priorities for management. We demonstrate an application of this new framework -the Freshwater Health Index (FHI) - in the Dongjiang River Basin in southern China, where stakeholders are addressing multiple and conflicting freshwater demands. By combining empirical and modeled datasets with surveys to gauge stakeholders' preferences and elicit expert information about governance mechanisms, the FHI helps stakeholders understand the status of freshwater ecosystems in their basin, how ecosystems are being manipulated to enhance or decrease water-related services, and how well the existing water re-source management regime is equipped to govern these dynamics over time. This framework helps to operationalize a truly integrated approach to water resource management by recognizing the interplay between governance, stakeholders, freshwater ecosystems and the services they provide
- Published
- 2018
- Full Text
- View/download PDF
4. Response of net primary production to land use and land cover change in mainland China since the late 1980s
- Author
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Zhaoli Wang, Xiaohong Chen, Yanqing Lian, Zhaoyang Zeng, Chengguang Lai, Xiaoqing Wu, and Jun Li
- Subjects
Mainland China ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Land use ,Primary production ,Land cover ,010501 environmental sciences ,01 natural sciences ,Pollution ,Carbon cycle ,Urbanization ,Environmental Chemistry ,Environmental science ,Terrestrial ecosystem ,Physical geography ,China ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
Land use and land cover patterns in mainland China have substantially changed in the recent decades under the economic reform policies of the government. The terrestrial carbon cycle, particularly the net primary productivity (NPP), has been substantially changed on both local and national scales. With the growing concern over the effects of the terrestrial carbon cycle on global climate changes, the impacts of land use and cover change (LUCC) on NPP need to be understood. In this study, variations in NPP caused by LUCC (e.g., urbanization and conversion of other land use to forest and grassland) in mainland China from the late 1980s to 2015 were evaluated based on land cover datasets and NPPs simulated from the Carnegie–Ames–Stanford Approach model. The results indicate that the national total losses in NPP attributed to urbanization reached 1.695 TgC between the late 1980s and 2015. A large proportion (63.02%) of the total losses was due to the transformation from cropland to urban land. Urban expansion decreased the monthly and total NPPs over southern China, which includes the South China Region, Southwest China Region, and the middle and lower regions of the Yangtze River. However, the total NPP increased in the majority of urbanized areas in Northern China, including the Huang–Huai–Hai Region, Inner Mongolia Region (MGR), Gan-Xin Region (GXR), and Northeast China Region; monthly NPP in GXR and MGR increased throughout the year. By contrast, the conversion to grassland or forestland increased the monthly and total NPPs of Northern China, suggesting that returning to forestland and grassland could increase the carbon sequestration capacity of terrestrial ecosystems in mainland China. Among the sub-regions, the Loess Plateau Region contributed the largest increase in NPP, which was prompted by the conversion to grassland and forestland.
- Published
- 2018
5. Does drought in China show a significant decreasing trend from 1961 to 2009?
- Author
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Ruida Zhong, Jun Li, Xiaowen Zhou, Xiaohong Chen, Zhaoyang Zeng, Chengguang Lai, Mingyuan Wang, and Zhaoli Wang
- Subjects
Environmental Engineering ,Plateau ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,0208 environmental biotechnology ,Global warming ,Empirical orthogonal functions ,02 engineering and technology ,01 natural sciences ,Pollution ,Arid ,020801 environmental engineering ,Geography ,Polar vortex ,Climatology ,Environmental Chemistry ,Indian Ocean Dipole ,China ,Waste Management and Disposal ,Pacific decadal oscillation ,0105 earth and related environmental sciences - Abstract
In recent decades, the occurrence and severity of drought in China has had devastating impact on social and economic development. The increase in drought has been attributed to global warming. We used the high-accuracy self-calibrating Palmer Drought Severity Index (scPDSI) to investigate the variation in drought in China between 1961 and 2009 using the Mann-Kendall (MK), continuous wavelet transform (CWT) and the rotated empirical orthogonal function (REOF) methods. We also analyzed the relationship between the rotated principal component time series (RPCs) and 74 circulation indices. The results revealed that: 1) all of China experienced a significant wet trend at annual and seasonal scale; an abrupt change in the drought pattern occurred around 1970 with a 2-8-year significant period; 2) eight major sub-climate regions were identified: Northwest China, Northeast-Inner Mongolia Plateau, Greater Khingan Range area, Northern Tibetan Plateau, Southern Tibetan Plateau, Central China, Huang-Huai-Hai Plain and Southeast China. Of these regions, the Southern Tibetan Plateau experienced a significant wet trend, but the Northeast-Inner Mongolia Plateau and Northern Tibetan Plateau became significantly drier. Using either annual or seasonal scales, Northwest China became significantly wetter and Central China became more arid. In addition, the period of each sub-climate region shared a significant 2-8-year band; 3) the polar vortex exhibited dominant patterns that affected most areas of China. The Pacific Decadal Oscillation had a significant influence on drought evolution, especially for Northwest China and the Huang-Huai-Hai plain. Additionally, the El Niño-Southern Oscillation also affected drought evolution, and the Central China was impacted by the Indian Ocean Dipole.
- Published
- 2017
6. Flash droughts in the Pearl River Basin, China: Observed characteristics and future changes
- Author
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Jun Li, Zhaoli Wang, Xiaohong Chen, Shenglian Guo, and Xushu Wu
- Subjects
Hydrology ,geography ,Environmental Engineering ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Drainage basin ,010501 environmental sciences ,Heat wave ,01 natural sciences ,Pollution ,Flash (photography) ,General Circulation Model ,Environmental Chemistry ,Environmental science ,Precipitation ,China ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
Heat wave flash drought or precipitation deficit flash drought has devastating impacts on society and the environment. This study explored the historical changes (1960–2015) of the two categories of flash drought over the Pearl River Basin (PRB) in China, and revealed how they would change in the future (2016–2100), by coupling the variable infiltration capacity mode with the global climate model under representative concentration pathway (RCP) 2.6, 4.5, and 8.5 scenarios. Our results indicate that during 1960–2015, the mid-northern PRB has experienced heat wave flash drought frequently while the western PRB suffered from precipitation deficit flash drought. In future, heat wave flash drought under RCP2.6 and 4.5 would occur mostly in the western and eastern PRB. Specifically, heat wave flash drought would become severe under RCP8.5, especially for the eastern PRB. However, precipitation deficit flash drought would be concentrated in the western PRB. Except for the central regions, PRB generally exhibits a significant upward trend in heat wave flash drought under RCP4.5. Under RCP8.5, distinct increases in both categories of flash drought across almost the whole PRB are expected. For precipitation deficit flash drought, only a few regions show significant upward trends under RCP2.6 and 4.5.
- Published
- 2020
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