水科学进展2012，Vol.23Issue(3)：409-418,10.
钱塘江河口段盐水入侵的时空变化及预测模型
Temporal-spatial variation of salt water intrusion in the estuarine reach of Qiantang River and its numerical simulation
摘要
Abstract
The estuarine reach of Qiantang River provides 85% fresh water supply to Hangzhou city. However, the estuarine water quality is threatened by salt water intrusion during spring tides of dry seasons. It is thus important to analyze the temporal-spatial variation of salt water intrusion and to develop a two-dimensional (2D) numerical model for the estuarine reach of Qiantang River. In this study, the temporal-spatial variation of salt water intrusion is analyzed using observed chloride profiles collected during spring tides. A 2D numerical model for coupled fluid flow with salinity transport is developed accordingly. The governing equations of the model are solved by an explicit finite-volume method with good conservation performance. The influence of river runoff and tidal current on salt water intrusion in the estuarine reach of Qiantang River is studied using the 2D numerical model. The result shows that both river runoff and tidal current have great influence on salt water intrusion in the estuarine reach. Countenneasures such as increasing discharge from the upstream Xin'an reservoir can effectively restrain the salt water intrusion and thus to reducing the chloride concentration and the over-standard time in estuarine waters. As a result, good water quality at the intakes can be maintained at the Level of safe water supply.关键词
盐水入侵/二维盐度数值模型/有限体积法/钱塘江河口/预测模型Key words
salt water intrusion/ 2D numerical model/ finite volume method/ Qiantang River estuarine reach/ predict model分类
建筑与水利引用本文复制引用
史英标,潘存鸿,程文龙,尤爱菊..钱塘江河口段盐水入侵的时空变化及预测模型[J].水科学进展,2012,23(3):409-418,10.基金项目
水利部公益性行业科研专项经费资助项目(201101056) （201101056）
国家水体污染控制与治理科技重大专项(2009ZX07424-001) （2009ZX07424-001）
