南水入密云水库对水质及水环境的影响
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摘要
南水北调来水调入密云水库调蓄工程思路优化了南水北调中线总体布局,实现了南北联调、丰枯相济,同时恢复密云水库在供水任务中的重要地位,提高了北京水资源战略储备。由于丹江口水库和密云水库分属于两个不同的流域,且分别位于两个气候区,因此水体水质可能存在一定的差异。为避免调水可能带来的水质及水环境风险,在前期设计阶段与相关单位联合开展了两库水质调查、水质混合试验,构建密云水库平面二维水环境数学模型并进行了分析。研究结果表明:工程运行后两库水混合,对密云水库的水质、水温及其他理化指标没有产生不利影响,密云水库库区整体富营养化状态将逐年改善,调南水入密云水库有利于改善现状密云水库常年低水位运行所面临的富营养化、水质恶化等问题。
The project of South-to-North Water Diversion into Miyun Reservoir has optimized the overall layout of the middle line of the South-to-North Water Diversion Project. The north-south alliance was realized and of economic at the same time, it is important to restore Miyun Reservoir in the water supply task and improve the strategic reserve of Beijing's water resources. The Danjiangkou Reservoir and Miyun Reservoir belong to two different basins. They are located in two climate zones. There may be some differences in water quality. In order to avoid the water quality and water environment risk brought by water diversion, it conducted water quality survey and water quality mixing tests of the two reservoirs with related departments in the early stage of design. It built a mathematical model of two-dimensional water environment of Miyun Reservoir. The results show that the two reservoirs water is mixed after operation. The water quality, water temperature and other physicochemical indexes of Miyun Reservoir are not adversely affected. The overall eutrophication of the reservoir area of Miyun Reservoir will be improved year by year. The diversion of water into Miyun Reservoir is conducive to improving the situation of eutrophication and deterioration of water quality in the current low water level operation of Miyun Reservoir.
The project of South-to-North Water Diversion into Miyun Reservoir has optimized the overall layout of the middle line of the South-to-North Water Diversion Project. The north-south alliance was realized and of economic at the same time, it is important to restore Miyun Reservoir in the water supply task and improve the strategic reserve of Beijing's water resources. The Danjiangkou Reservoir and Miyun Reservoir belong to two different basins. They are located in two climate zones. There may be some differences in water quality. In order to avoid the water quality and water environment risk brought by water diversion, it conducted water quality survey and water quality mixing tests of the two reservoirs with related departments in the early stage of design. It built a mathematical model of two-dimensional water environment of Miyun Reservoir. The results show that the two reservoirs water is mixed after operation. The water quality, water temperature and other physicochemical indexes of Miyun Reservoir are not adversely affected. The overall eutrophication of the reservoir area of Miyun Reservoir will be improved year by year. The diversion of water into Miyun Reservoir is conducive to improving the situation of eutrophication and deterioration of water quality in the current low water level operation of Miyun Reservoir.
引文
[1] 北京市水利规划设计研究院.北京市南水北调配套工程南水北调来水调入密云水库调蓄工程初步设计报告[R].北京:北京市水利规划设计研究院,2013:121-126.
[2] 北京市水利规划设计研究院.南水北调来水调入密云水库调蓄工程环境影响报告书[R].北京:北京市水利规划设计研究院,2012:319-653.
[2] 北京市水利规划设计研究院.南水北调来水调入密云水库调蓄工程环境影响报告书[R].北京:北京市水利规划设计研究院,2012:319-653.