Research On The Environmental Capacity In West Shaoxi

On the basis of the characters of water environment as well as hydrology, we combined with both laboratory and field experiments, at the same time, analysis and evaluation had been done with regard to the specific conditions of water environmental quality of West Shaoxi main stream. The main pollution of West Shaoxi was organic compound and ammonia nitrogen by the method of the evaluation of single factor according to the current data.The water quality of West Shaoxi was adopted in this study by QUAL2K, a powerful comprehensive water quality software for rivers developed by Environmental Protection Agency of United States, which was characterized by its comprehension, multi-purposes. Based on the flow characteristics, water quality model coefficient was also identified. On the basis of the test and sensitive analysis of the model, water environmental capacity was calculated when water quality was simulated by QUAL2K model. The results showed that this model could be well used in West Shaoxi for water quality modeling and prediction.Using the environment capacity method and model trial method calculated the environment capacity of the main reach in West Shaoxi. Analyzing the results to decide the adopting method. The reach that surpassed the water environmental capacity should be cut down according to the water quality standard. On the basis of the allowing discharge, we adopted equal ratio curtailment method to distribute TAC in order to meet the discharge standard after minifying. At last, the Countermeasures of pollutants control and the measure of TAC implementing goal were put forward in the research area.