长江特枯水情下青草沙水库供水潜能分析研究

Research and analysis of the water supply potentiality of Qingcaosha Reservoir during the low water period of Yangtze River

根据长江流域新水情和长江北支新地形等有利条件,依据长江口咸潮严重入侵期氯化物过程线进行水量平衡精细化调算,提出以满足水库输水氯化物不超过250mg/L为前提,利用青草沙水域氯化物过程的低谷低盐区域取水调度技术,解决长江特枯水情下的青草沙水库库容不能满足供水需求的难题。结合陈行水库实际运行经验,同时经数值模拟计算验证,采用该调度技术,可以解决目前青草沙水库有效库容不能满足设计供水规模要求的问题,进一步扩大青草沙水库的供水能力,有效提高水库利用效益和保证水源地安全运行,同时可以为国内外同类河口水库供水潜能的开发利用提供借鉴。

Based on the latest hydrological condition of Yangtze River basin, the topography of the north stream of Yangtze River and the precise water yield calculation of chloride process line during the peak salt tide intrusion at the Yangtze River mouth, this paper suggests dispatching water from low - ebb and low - chloride area of Qingcaosha Reservoir to solve the water supply shortage during the low water period of Yangtze River at the prerequisite of the chloride concentra- tion being lower than 250 mg/L. Relying on the expertise of the operation of Chenhang Reservoir and numerical simulation, the application of the water dispatching can resolve the problem that the effective capacity of Qingcaosha Reservoir is lower than the design demand, thus increasing the wa- ter supply capacity of the reservoir. In addition, the utilization efficiency of the reservoir can be im- proved and the safety of the water source can be ensured, and provides useful reference of develo- ping water supply potentiality of reservoirs at river mouth at home and abroad