钱塘江河口是杭州最重要的供水水源，却存在着严重的低氧现象，威胁杭州的供水安全。基于Mike21的HD、AD、Ecolab模块，构建了钱塘江河口上游段潮流水质耦合模型，模型不仅可模拟河口的非恒定流、污染物输移特性，还可以模拟DO与BOD、NH3-N、NO3-N、叶绿素等物质的生化过程。借助构建的数学模型，定量研究了富阳造纸废水及下泄径流量对钱塘江河口低氧河段的水质影响，计算结果表明，减少富阳市造纸废水排放及增大径流量可降低低氧河段的BOD5浓度，显著提高DO浓度，据此提出了改善钱塘江河口低氧状况的建议。
Abstract
The estuary of Qiantang Ｒiver，a very important water-supply source of Hangzhou City，has a severe hypoxia． In this paper，a coupling flow and water quality model of Qiantang Estuary based on mike 21 is established，which can simulate hydrodynamic and DO responding to BOD，NH3－N and NO3－N． With the help of the model，the water quality variation of Qiantang Estuary responding to sewage
quantity of Fuyang City and runoff volume is quantitatively studied，and then suggestions on how to improve hypoxia are put forward．
基金
浙江省重点研发计划项目( 2015C03G5050020) ; 浙江省自然科学基金( LY16D060004)
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