乌江水库水质评价及原因分析

Cause analysis and water environmental quality evaluation in Wujiang Reservoir

根据2006～2010年水质监测资料对乌江水库水质进行了现状评价及分析,结果表明:乌江水库各垂线水质以Ⅳ类水质为主,主要污染物为总磷,主要来自支流息烽河;乌江水库水质总体在逐年好转,由2006年的劣Ⅴ类水质断面占75%,到2010年的无劣Ⅴ类水质断面,且Ⅳ类水质断面占到75%;从污染物变化趋势来看2,006～2010年乌江水库总磷浓度呈显著下降趋势。

Based on the systematic water quality monitoring data to analyze and assess Wujiang Reservoir from the year of 2006 to 2010. The result reveals that the main water quality of each vertical water quality of Wujiang Reservoir is class IV, the main pollutant is TP. In these four vertical water lines of estuaries, Xi Feng estuary has the most seriously TP polluted in water. Generally, the water quality of Wujiang Reservoir has gone up year by year, from 75% occupied by low class V water quality section in 2006 to 75% occupied by class IV water quality section and none low class V water quality section in 2010. From the variation trend of pollutant, the density of TN of Wujiang Reservoir from 2006 to 2010 reveals a remarkable decline trends.