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- W2261773184 abstract "Abstract Environmental flow plays an important role in sustaining or improving wetland ecosystems. There are many methods for environmental flow assessments, most of which only focus on simplistic environmental flow standards or theoretical cause–effect relations between flow regimes and target species. However, traditional assessments may not be suitable for ecosystems with severe water quality deterioration. Ignoring relationships among flow, water quality, and multi-level ecological responses in real and complex ecosystems may misguide management practices and lead to further ecosystem degradation. To investigate impacts of flow alteration on ecosystems with different pollution rates, and examine the underlying mechanisms, a two-dimensional hydraulic and ecological model was developed in this study. This model simulates flow circulation; pollutant transport; and the interactions between flow, nutrients, and holistic ecosystem characteristics. The integrated model was applied to 21 scenarios to understand ecosystem characteristics in response to various environmental flow rates and water quality standards. Finally, holistic indicators including total primary production/total respiration, total biomass/total production, eco-exergy, and structural eco-exergy are used to quantify the effects of different scenarios on ecosystem health, and provide scientific environmental flow recommendations. The proposed method was applied to Baiyangdian, the largest wetland in the North China Plain. The results indicate that the annual environmental flow should be higher than 2 m3/s in order to prevent the Baiyangdian ecosystem from further degradation. To maintain an optimal ecosystem status, the minimum environmental flow should be kept as 5–9.5 m3/s, and the maximum environmental flow should be kept as 9–13.5 m3/s in different hydrological years. In addition, the water quality should be always kept at or above the Chinese class IV standard. This result can guide basic research in hydroecology and assist further implementation of comprehensive environmental flow management." @default.
- W2261773184 created "2016-06-24" @default.
- W2261773184 creator A5005082394 @default.
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- W2261773184 date "2016-11-01" @default.
- W2261773184 modified "2023-10-17" @default.
- W2261773184 title "Environmental flow management strategies based on the integration of water quantity and quality, a case study of the Baiyangdian Wetland, China" @default.
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- W2261773184 doi "https://doi.org/10.1016/j.ecoleng.2015.12.018" @default.
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