太湖出入湖水质评价

Quality Assessment of Inflow to and Outflow from Taihu Lake

1987年沿太湖历年巡测线进行了4次水文、水质同步监测，共有139条河道参加评价，有水文、水质监测项目38个．评价中水质采用五级水标准，选用pH值等18项指标作为评价参数．评价结果表明，入太湖水质污染主要以有机污染为主，出湖污染主要在江苏湖东段，占总量的60％．因此，保护好太湖水质必须控制和减少入湖污染物量，加强污染源治理，限制污染行业发展．

Taihu Basin is a most developed district of industrial and agricultural economy,but it is a severest pollution district in China. Pollutant water volume drainaged into rivers andlakes is 3 650 million ton every year. Taihu's water quality is much worse and eutrophic becausemass agricultrual drainage and part urban sewage drainaged into Taihu Lake. This artic1e usedobserved data to assess water quality of 139 rivers. and raised the improvement priciple for waterquality of Taihu Lake.