Research On The Quality Analysis And Evaluation Approaches To Water Environment Of Baitapu River

Since the water environment has drawn attentions among nations and the problem solving of water pollution has been increasingly urgent,the analysis and research on water environment become more and more crucial.This paper aims on the study of Baitapu River,main tributary of Hunhe River drainage.Based on one-year sample monitoring which has collected a large amount of data,this paper conducts Nemero comprehensive index analysis,matter-element model,risk assessment of water eutrophication,and analysis of pollution fountain.Then,it has summarized the current water quality and pollutant source in Baitapu River and offered evaluation system,results of water eutrophication as well as suggestions on river water pollution control.By applying Nemerow Index method and matter element analysis methods,this research conducts seasonal and spatial differences analysis on Baitapu River,evaluation on water quality from different seasons and sections,establish element analysis model,and then by adapting variation coefficient method,it obtains weight of each pollution factor.By applying the universal index formula of logarithmic power function,it calculates the subject’s comprehensive index of water eutrophication in different seasons and sections and evaluate the level of eutrophication in the river.It also detects on the pollution sources along the river.According to the results of above three factors,this paper will provide suggestions on governance and pollution control of Baitapu River.The study has shown the severe water pollution and eutrophication,and it has been a progressive rising pollution in the streams along the river.The section in The Shenyang Ligong University has witnessed most serious pollution which is rated as Heavy Water Pollution,Inferior V water quality and Extremely Rich in terms of the eutrophication of the water body.Analysis from four seasons,the pollution degree of winter is lower than the other three seasons.Analysis from space,the pollution degree of urban areas is higher than rural areas while tributaries are more serious than main river.From Nemero composite index,the four seasons water pollution types are mild and medium pollution,mild pollution in rural areas,and medium pollution level in urban areas.Matter-element model found variety in water quality in four seasons;namely,water quality in spring remains type Ⅲ and Ⅳ,water quality in summer ranks from type Ⅲ to type Ⅴ,and in autumn and winter,it ranks from typeⅡ to type Ⅴ among which section in the Shenyang Ligong University shows inferior type Ⅴ.Normally,water in urban areas grade 1 or 2 level higher than rural areas.From the analysis of water eutrophication,the whole year presents heavy or extremely eutrophic among which heavy eutrophic in rural area and extremely eutrophic in urban area.From the research on pollution sources,nitrogen and phosphorus emissions in urban areas exceed far beyond the emissions in rural areas.Emissions in Wusan Street are higher than Baita street and Hunhe Station North Street meanwhile Yingchengzi Village,densely inhabited village,are seen much higher emissions than Lixiang village and others.The major cause of pollutants in urban areas is municipal wastewater treatment plant discharge,and then urban non-point source pollution.In rural areas,it mainly comes from domestic sewage discharge and then agricultural non-point source pollution and livestock and poultry breeding.