The Environmental Quality Analysis And Environmental Capacity Study About The Surface Water In Pingyin County

Water affects the climate, changes topography, water also breeds life. Water around us everywhere, 71% of the earth surface is covered by the ocean, water that on the land(glaciers, rivers and lakes form)also covers the land surface about 15%. From the body to the life and from the industry to the agriculture, water infiltrated every aspect of us, the importance of water is evident, we can do nothing without water.In recent decades, accompanied by socio-economic development, the demands for water increase dramatically in our country, at the same time,a large number of industrial waste and untreated sewage is discharged directly into rivers, lakes, seas, water pollution and shortage is becoming increasingly serious. At present, 80% of the water has been contaminated in China, water quality is decreasing sharply, the contradictions are becoming more and more acute which between water supplies and water demands. In many places, with the outstanding of water environment issues, the water shortage lead by the bad water quality, has become a bottleneck which has constrained the national economic development. Therefore,with the economic development,the rational use of water environment must be emphasized. As the coordination of the water environment and socio-economic sustainable development,the evaluation of water quality and water environmental capacity has become the core of the water environment management.Under this kind situation of development demand, This article has launched the research to the quality and capacity analysis of surface water in Pingyin County,has carried on the elaboration in view of the applications about production and living. We expected,on the basis of the study of water quality and water environmental capacity, we can carry on the discussion and the analysis to a series of questions.These questions are that the determinations of maximum allowable pollutant emissions,of the plans that pollutant reduces,of the decisions that water environmental capacity rights of using,and of water pollution total quantity control,ect. All these lead to the combinations of water environmental capacity and water pollution control.The main contents of this paper are as follows:The first part is the preamble, mainly introduced the research background and the significance of research at home and abroad,all that is about the water quality and water environmental capacity. The same time, this article set out the scope of the study, research contents and research methods.The second part introduces the overview of the main surface water bodies, from the two aspects of geographical and socio-economic profiles. Based on these, the details of the four selected water bodies are given.The third part is the study about water quality assessment. A comprehensive analysis of current water quality evaluation has been carried on in this article, and comparison has been carried on each kind of water quality models'results about the accuracy and usability, then the water quality model applied to this article has been selected, and has been improved to lay the foundation for water quality and capacity evaluation in Pingyin County.The fourth part is about the water quality evaluation. Based on measured water quality data,using SPSS software and Principal Component Analysis,carries on the appraisal and the analysis on the water quality of Pingyin, obtains conclusion finally.The fifth part is the study which about the capacity of water environment. Based on the analysis of characteristics and influencing factors,multiple models of the water environmental capacity have been explored in this article,and further compared the computational methods of general degradation of water pollutants in the value of K.The sixth part of the research,water environmental capacity is calculated. Based on the general understanding of the definition,classification, characteristics and influencing factors all that about water environment capacity, combined the application scope of every water environmental capacity model ,identified the water environmental capacity computing models that the main water bodis of Pingyin County should be taken in calculation. And then under the light of the relevant hydrological parameters, using the improved models of water environmental capacity,I come to the conclusion of Surface water environmental capacity in Pingyin County finally.Part seven is Conclusion. On the basis of the results that of water quality and water environmental capacity has been calculated previously,a brief analysis of the causes that water pollution in Pingyin County is given, water environmental protection measures about Pingyin County have been proposed target-orientedly.