Spatial and Temporal Changes of Water Quality in Yinchuan Yuehai Wetlands

In order to avoid one-sidedness of single point analysis for water quality of lakes,improve the accuracy of lake water quality analysis,so as to identify the characteristics of the spatial and temporal distribution of water quality in lakes.The comprehensive pollution index method was used to conduct an seasonal multi-point and multi-index quality analysis of Yinchuan Yuehai wetlands,at the same time the spatial distribution of pollutants in Yuehai wetlands was analyzed by equidistant weight interpolation method.The results showed that Yuehai wetland pollution was the most serious in spring(March).All pollutants in various points exceeded the limits seriously and the pollution varied significantly in different points.The pollution was relatively light in Autumn(October) with little variation of pollution in different points,which was in accordance with Yuehai size and aquatic organism.Meanwhile,total phosphorus pollution should be paid more attention to.The spatial distribution of pollutants showed that the concentration distribution of various pollutants existed some difference.