沈阳辉山水库水质污染现状分析及评价

根据《地表水环境质量评价办法》中规定的方法,对沈阳辉山水库进行了水质和富营养化状态评价,并对污染源和水质污染特性进行了分析。结果显示:水库水质类别为劣Ⅴ类,水质状况为重度污染。富营养化综合营养状态指数为34.44,辉山水库水质为中营养化水平,水库没有藻类水华的产生。水库主要污染指标为总磷、总氮和悬浮物,分别超出国家地表水Ⅲ类标准的14.2倍、5.85倍和2.72倍。整个库区水质变化不均匀,水质变化受库区沿岸污染物排放影响较大,辉山明渠上游和某工厂暗渠排污口输入是水库主要污染源,库区周围动迁后的荒地和蚯蚓养殖,是辉山水库地面径流和农业污染污染源。

Analysis and Evaluation of Water Pollution Status of Huishan Reservoir in Shenyang

According to the procedures formulated in the evaluation method of environmental quality of surface water, the status of water quality and eutrophication of Huishan Reservoir in Shenyang is evaluated and the pollution source and water pollution characteristics are analyzed. The results show that water quality of the reservoir is categorized as inferior level V in the state of serious pollution. Eutrophication index TLI （ ∑ ） is 34.44 and water quality of the reservoir is in the level of moderate eutrophication without generation of algae bloom. TP, tiN, and SS are the major pollution indicators of the reservoir and exceed class Ⅲ of the national environmental quality standard for surface water by 14.2 times, 5.85 times and 2.72 times respectively. Water quality variation of the whole reservoir is not uniform and significantly affected by pollutant discharge along the reservoir bank. The upstream of Huishan channel and inflow of the effluent from a culvert discharge outlet of a certain plant are the main pollution sources. The wasteland left after relocation surrounding the reservoir and earthworm cultivation is the pollution sources for surface runoff and agriculture.