浙江省建德市位于钱塘江中游,境内有新安江、兰江、富春江三大河流;其他支流流域面积在100平方公里以上的有7条,10～100平方公里以上的有31条。河流众多,属雨源类河流,又因河床比降大,而属山溪性河流。洪灾严重,如2000年6月18日全市普降大雨,6月18日6时至19日8时降雨量166毫米,雨量较为集中,造成较大洪灾。灾后我们对所管辖的新安 Jiande City, Zhejiang Province is located in the middle reaches of Qiantang River, with Xin’anjiang, Lanjiang and Fuchunjiang rivers in its territory. There are 7 other river basins with an area of ​​100 square kilometers and 31 with 10-100 square kilometers. Many rivers, is a rain-type rivers, and because of the riverbed is larger than, but a mountain stream Creek. Heavy floods, such as the heavy rainfall in the city on June 18, 2000, the rainfall of 166 millimeters at 6 o’clock on the June 18 and at 8 o’clock on the the 19 January, resulted in a more concentrated rainfall and a greater flood. After the disaster we are under the jurisdiction of Xin’an