Total quatity control of non |point source pollution in urban water environment
城市水环境非点源污染总量控制研究与应用

On the base of investigating and analyzing the non\|point source pollution, the built\|up area in Yizheng City was divided by grids. According to the features of land utility, the pollutant load of non\|point source of each grid and its spatial orderlines were decided by investgation. During the non\|point source pollution' occurrence, its load was compared with point source pollutant load which was thought to be constant with time, then their common impacts on the river were assessed. COD was selected to be the control variable and the water environmental capacity was calculated. Some relevant suggestions and measures were presented in the end.