Abstract
The arithmetic average water quality index method and Nemerow index method of quality evaluation index methods were applied to the water quality assessment in two sections which were Yanjiaxiang and Xiyangsi Power Station. Then it put forward some appropriate recommendations for the control of non-point source pollution. At last, it come to four conclusions: (1) The water pollution in Xichong River (Xichong’s territory) is very serious and the data show that the water quality is substandard almost all the year round. (2) Nemerow index method has a better reflection of water quality than arithmetic average water quality index method. (3) The situation of water pollution in Hongxi River is more serious than Longtan River. (4) Non-point source pollution is the main reason of water pollution and wet months have an obvious effect on diluting pollutants.
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