丹河晋城段水质评价及变化趋势分析

采用综合水质标识指数法对丹河晋城段在2006年-2010年间6个断面水质进行了综合评价,分析结果表明6个断面水质在2010年均能达标,各类水质污染物中,氨氮在丹河晋城段超标范围最广,超标程度较深,是影响丹河水质的主要污染物。同时应用Speraman秩相关系数法对丹河晋城段6个断面在近5年间的水质变化趋势进行探究,分析结果表明丹河晋城段6个断面中水东桥和后寨两个断面水质呈显著好转趋势,其它4个断面水质变化比较稳定。

Water Quality Assessment and Variation Trend Analysis on Jincheng Sectionof Danhe River

This study adopts comprehensive water quality identification index method to evaluate the water quality of Jincheng section of Danhe River based on the monitoring data of six fiver sections during 2006 -2010. The results showed that all the water quality of six sections can meet standard in 2010. Ammonia nitrogen was the main pollutant in Jincheng section due to its wide distribution and exceeded the standard substantially. At the same time, the Speraman rank correlation coefficient method was ap- plied to analyze the water quality variation trend of the six sections during the past five years. The result showed that the water quality of Shuidongqiao and Houzhai sections improved significantly. However, the water qualities of the other four sections were stable during the past five years.