横江流域水环境质量综合评价方法探讨

根据横江流域7个水质监测站2008年监测资料,结合单因子评价法与算术平均、综合指数法与面积加权、综合指数法与径流加权3种方法对其水质进行综合评价,并分析了3种评价方法的优缺点。结果表明,采用单因子评价法与算术平均结果较其他两种方法偏大。建议根据径流对水质的影响程度,选择使用综合指数法与面积加权或综合指数法与径流加权进行流域水环境质量综合评价。

Discussion on comprehensive evaluation method for basin water environment quality: A case study of Hengjiang River Basin

According to monitoring data from seven water quality monitoring stations in the Hengjiang Rivet＇ Basin in 2008, three methods, the single-factor evaluation method combined with arithmetic average, the composite index method combined with area-weighting, and the composite index combined with runoff-weighting, were used to make a comprchensive assessment of water quality, and the advantages and disadvantages of three evaluation methods were analyzed. The resuhs from the single-factor evaluation method combined with the arithmetic average were larger than those from other two methods. It is recommended that the composite index method combined with area-weighting or runoff- weighting be used to assess the basin water environment quality according to influence degree of runoff.