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《Resources and Environment in the Yangtze Basin》 2010-S2
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TANG Xian-qiang1,YANG Wen-jun2,YIN Wei3,JIN Feng1,YE Min3(1.Changjiang River Scientific Research Institute,Wuhan 430010,China;2.Bureau of International Cooperation,Science and Technology of Changjiang Water Resources Commission,Wuhan 430010,China;3.Changjiang Water Resources Protection Institute,Wuhan 430051,China)  
Ecological restoration is the most effective strategy for watershed non-point source pollution control and water eutrophication prevention.In order to improve the ecological environment for the Danjiangkou Reservoir and guarante the water quality safety after the dam heightening project,we evaluated the water quality status and analyzed the major water pollution loadings.It indicated that non-point source pollution dominated the total pollution loadings after the control of the point source pollution.Nutrient including nitrogen and phosphorus input and accumulation led to the water quality deterioration and ecological damage,and threatened the sustainable and safe water supply.Under the dam heightening and operation regulation conditions and with the aim of nitrogen and phosphorus reduction and water eutrophication control,contaminant purification mechanism and water restoration performance were introduced for the main ecological restoration approaches,including riparian zone,constructed wetland,floating island,submerged macrophytes restoration,aquatic fauna and flora combined system and pre-dams.At last,ecological restoration strategy that suitable for the environmental characteristics of the Danjiangkou Reservoir was explored after summarizing and analyzing the technique features,application range and management requirement of the above leading ecological restoration methods.
【Fund】: 水利部公益性行业科研专项经费项目“丹江口水库水质安全保障技术研究”;; 长江科学院博士启动基金“人工湿地营养盐去除模拟研究”
【CateGory Index】: X524
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