A Study on the Water Environmental Quality Assessment of Fenjiang River in Yaan City of Sichuan Province in China

This paper assessed the water environmental quality of Fenjiang River in Ya’an City in Sichuan Province using a fuzzy comprehensive evaluation and grey clustering evaluation methods. The results show that the water quality of this river is clean, comparatively clean and slight pollution in its upper reaches, middle reaches and lower reaches respectively. Finally, based on analyzing the corresponding reasons, this paper put forward some suggestions.