Analysis And Evaluation Of Surface Water Environment In Yichun City

Analysis and evaluation of water environment is according to certain standard and evaluation method to assess the quality of the water environment, analyzed development trend of environmental quality, evaluate the impact of human activities on water environment quality. Water is fundamental to the survival of all biological natural resources and strategic economic resources, economic development and ecological environment improvement of irreplaceable natural resources. In recent years, with the rapid development of social and economic production and living water consumption and pollutant emissions and increasing. By the lack of water resources and water environment pollution of continuous increase of the water resources crisis, has become one of the important factors of restricting economic and social sustainable development.This article is on the collecting and organizing yichun area of all kinds of water environment monitoring sites of water quality data, on the basis of evaluating the regional water environment quality, analysis of the surface water environmental carrying capacity, water function area protection requirement and the water quality target as the core, in accordance with the approved water self-purification law of different functional areas; With water environmental carrying capacity as the constraint condition, combining yichun area social and economic development layout, the pollution level and the relevant laws and regulations requirements, analysis of water into the river pollution gross area limitation. (1) the tangwanghe has yichun area, the hulan river, yichun river main river water environment quality is not ideal, such as surface water environment quality standard III water river points only accounted for 17.4%. FeiWuShui emissions still maintain at a high level, t FeiWuShui emissions by 67.78 million, the main water pollutants COD annual emissions of 13735.0 t, ammonia nitrogen annual emissions of 1251.0 t. (2) the rate of the hydrological parameters systematically, put forward the general function 75% assurance water during the dry season average flow design, the design flow rate; (3) the chemical oxygen demand (cod) of water environment is more sensitive and ammonia nitrogen has reasonable attenuation coefficient for analysis and test, gives the design of hydrological conditions of the water function section of the K value, the region each river chemical oxygen demand (cod) K value is between 0.110-0.312, ammonia nitrogen K value is between 0.110-0.352. (4) on the basis of the waters, the ability to one dimensional calculation model, calculation of water environmental carrying capacity, through the analysis of COD yichun area pollutant carrying capacity is 4372.6 t/a, ammonia nitrogen pollutant carrying capacity is 307.0 t/a. (5) in water function area protection target and pollutant emission levels, put forward the amount of pollutants into the river control implemented in stages recommended indexes.