安岳县姚市河流域水体达标分析及措施建议OACSTPCD

This study comprehensively investigated the current status of the water environment of Yaoshi River Basin in Anyue County,explored the causes of river water pollution,and put forward feasible water ecological environmental protection measures to promote the reduction of pollutants inputted into the river,and continuously improve the water quality in the state-controlled,city-controlled and densified monitoring sections.Through the division of control units,pollution source investigation,environmental issue analysis,and environmental capacity calculation,the reduction of pollutants inputted into the river based on the up-to-standard water quality of the sections.According to the calculation,the control unit of Shuanghekou section needs to reduce 23.39 t/a COD and 0.56 t/a NH3-N.The control unit of Changhe River Bridge section needs to reduce 64.25 t/a COD and 7.62 t/a NH3-N.The control unit of Hongyanzui Wharf needs to reduce 14.54 t/a COD.The control unit of Tongxian River needs to reduce 1.87 t/a NH3-N.The control unit of Baisha section needs to reduce 26.41 t/a COD.It is suggested to apply comprehensive treatment to the Yaoshi River in Anyue County from perspectives of improving the efficiency of urban sewage treatment,promoting rural water environment management,controlling agricultural non-point source pollution,carrying out water ecological protection and restoration,strengthening ecological flow guarantee of water resources,applying strict supervision on enforcement of environmental law and joint prevention & control.As estimated,these can reduce 229.09 t of COD,21.31 t of NH3-N and 3.53 t of TP inputted into the river every year,so as to comprehensively improve the water quality of Yaoshi River,and realize the sustainable development of ecological environment and social economy of the basin.