Investigation and Prevention of Pollution Sources of Water Environment in Jianyang Section of Jiangxi River Basin

Based on investigation of the water pollution sources in Jianyang section of Jiangxi River basin, main water pollution sources were found out. One-dimensional water quality model was used to calculate the water environmental capacity and control measures of water pollution were put forward. The results showed that the main water pollution sources were township domestic sewage, rural domestic sewage and farm runoff. Their equivalent standard pollution loading ratio was 45.7%, 28.7% and 22.6%, respectively. The water environmental capacity of COD_cr and NH₃-N was 1354 t/a and 43 t/a, respectively. And the surplus water environmental capacity of COD_cr and NH₃-N was 227 t/a and -149 t/a. Therefore, construction of municipal sewage treatment facilities and ecological river should be enhanced and ecological agriculture should be developed vigorously.