辽河流域干流水质特征分析与评价

根据国家《地表水环境质量标准》,采用单因子评价方法,对辽河流域干流28个断面水质进行分析和评价。结果表明,辽河流域水质污染严重,水质超标区域主要分布在辽河干流的上游和下游,主要污染指标为高锰酸盐指数、氨氮、挥发酚和重金属元素。其中,高锰酸盐指数在辽河上游老山头断面超标倍数为Ⅴ类水体标准的17.3倍。辽河干流39%的河段为Ⅲ类水体,21%的河段为Ⅳ类水体,Ⅴ类或劣Ⅴ类水体的比例高达40%。

Analysis and Evaluation of Water Quality Characteristics in Liaohe River Basin

According to national surface water environment quality standard,single-factor evaluation method was adopted to analyze and evaluate water quality of 28 sections in Liaohe River Basin.The results showed Liao River Basin occurred serious water pollution,water quality area exceeding the standard was mainly distributed in the upstream and downstream of Liaohe River.The main pollution indicators were permanganate index,ammonia,volatile phenols and heavy metal elements.Permanganate index in the old hills of the Liaohe River upstream section superscalar multiples of 17.3 times Ⅴ water standard,39% of the Liaohe river main stream was class III waterbody,21% of the river sections was Ⅳ water body,V class or inferior Ⅴ water reached 40%.