The Study On The Division Technology Of Protection Areas Of Yan'er River Reservoir And Drinking Water Source Of Mianyang City

With the frequent human activities and the development of high strength,surface water pollution problem is increasingly prominent in our country.Therefore,establish a drinking water sources protection zones for the key measure to solve the problem of surface water source pollution,is also the powerful means of protection of water source.Increased with the strength of the mianyang city infrastructure construction,especially after the“5.12”earthquake,post-disaster reconstruction work in full swing,with the rapid increase of mianyang city water supply demand and drinking water sources is relatively single,urbandrinking water safety in the potential social risks and potential safety hazard.With water supply security problem increasingly prominent,and highlights the scientific calculation method is used to yan'er river reservoir water source of drinking water sources protection zones for the importance of the research,evaluation and classification.In this paper,the yan'er river reservoir area of the natural environment and social economic status,determine the size of the object of local urban water supply and water supply,and the urban water supply water quality standard is evaluated.Paper analyzes yan'er river reservoir water source region water system structure and the characteristics of water quality and water quality status and pollution source distribution,this paper analyzed the water environmental risk.Yan'er river reservoir water quality situation of overall surface water environment quality standard(GB3838-2002)? class standard,the main standard project for the total phosphorus,chemical oxygen demand,permanganate index.By the method of Carson index,chlorophyll a,total phosphorus,total nitrogen.transparency and permanganate index 5 indicators of yan'er river reservoir eutrophication evaluation,north of yan'er river dam and reservoir for moderate eutrophication,water inlet and a water inlet for mild eutrophic,yan'er river reservoir water quality is presented organic pollution,should strictly control the reservoir storage quantity of N,P,especially may cause eutrophication is yan'er river reservoir basin should focus on prevention of environmental problems.Papers of yan'er river reservoir basin natural environment,ecological environment and social economic environment present situation has carried on the detailed investigation and evaluation,concluded that yan'er river reservoir is the main source of drinking water pollutants protection zones distributed farmers life pollution sources pollution,farmland runoff pollution,main water pollutants are COD and ammonia nitrogen.Papers suggest drinking water sources reserve classification scheme of yan'er river reservoir has carried on the concrete a drinking water sources area,divided into the primary water source reserve and secondary water reserves.For yan'er the water source of the main environmental problems,and puts forward the supervision and administration of water conservation and water conservation pollution control engineering,the combination of effective to cut off the external pollution,internal governance,to ensure that the yan'er river reservoir water quality improved at all.