金山县地处上海市西南远郊,南濒杭州湾,北连松江、青浦两县,东与奉贤县相邻,西与浙江省乎湖、嘉善两县接壤。杭州湾为我国著名的强潮海湾,北部低洼地区又是浙江上游来水过境入浦的通道,常受台风、海潮和上游洪水的夹击,历史上灾害频繁。金山人民为了变水害为水利,进行了 Jinshan County is located in the outer suburbs of southwest Shanghai, south of Hangzhou Bay, north of Songjiang, Qingpu two counties, east and Fengxian County adjacent to the west and Lake in Zhejiang Province, Jiashan two counties border. Hangzhou Bay is a famous strong tidal bay in China. The low-lying northern area is also the gateway to the upper reaches of Zhejiang that flows into Pu. It is often hit by typhoons, tides and upstream floods. Jinshan people in order to become water damage, carried out