Temporal variation and water quality assessment of Xiaoqing River catchment

Abstract

Xiaoqing River plays an import role in water supply, flood control and ecological protection in Shandong Province. The deterioration of water quality seriously threatens the safety of drinking water for local residents and water ecological environment. In order to investigate the present situation of Xiaoqing River, the cluster analysis was used to study the temporal variation of water quality, and the composite pollution index was used to assess the river water, lake and reservoir water quality. The temporal variation of CODCr, CODMn, total nitrogen, total phosphorus and ammonia in the river water was discussed from the year of 2009 to 2016. The results found that the water quality of Xaiqoing River has improved with time on the whole. The results found that total nitrogen was the major pollutant during all the sampling points. And the Mashang sampling station has the worst water quality. The result can help provide the references for the prevention and control of river water pollution and water ecological imbalance in the Xiaoqing River basin.