中文摘要：

杭州市第二水源千岛湖配水工程（简称配水工程）的实施将引起富春江水库下泄流量及过程改变，从而对钱塘江河口盐水入侵产生影响。建立考虑涌潮作用的二维盐度数值模型，在验证钱塘江河口潮位和盐度的基础上，预测配水工程实施对河口盐水入侵距离和重要取水口含氯度超标时间的影响。研究表明：配水工程实施后，上游富春江水库若按现状调度方案，对枯水年影响大，咸水上溯距离增加3．7km，沿岸取水口的可取水时间缩短0．2～3．6d，丰、平水年盐水入侵和引水前相当；通过水库的优化调度，可基本消除枯水年引水造成的盐水入侵影响。为减少配水工程实施的盐水入侵影响，采用水库的优化调度模式是必要的。

英文摘要：

Qiandao Lake water diversion project will change the runoff process of the Fuchun reservoir and the salini- ty of Qiantang River estuary. A two-dimensional numerical salinity model which including tidal bore＇s action is estab- lished. Based on tide and salinity testing, the distance of saltwater intrusion and the exceeding period of important wa- ter inlets caused by the project are calculated. Results showed that, it will be significantly effected in the low flow year by the current scheduling scheme, the distance of saltwater intrusion is increased 3 700 meters and time available for water inlets time along the river is shorten 0.2-3.6 days, but it is little effected in normal and high flow year. In or- der to reduce the influence of the salt water intrusion which happened due to the project in low flow year, a reservoir optimal operation is necessary.