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河流水质污染水平综合评价方法研究—以沈阳白塔堡河为例
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摘要
运用物元分析模型对白塔堡河2013年干支流36个监测点进行水质评价,以事物、特征及其量值为物元,建立水质评价物元模型;根据地表水等级标准和实测数据建立水质评估矩阵,通过变异系数法确定各评价因子权重,计算出河流水质污染水平等级。研究结果表明:沈阳市白塔堡河36个采样点水质级别基本属于Ⅲ~Ⅴ类水,整个河流可大致分为3个河段,即农村带、城镇带、城市带,水污染水平由农村带、城镇带、城市带依次逐渐升高。农村带基本属于Ⅲ类下限,城镇带基本属于Ⅲ类,城市带基本接近Ⅳ类水。
By using matter-element analysis model, the comprehensive water quality of Baitabu River was assessed based on 36 monitoring point distributing in the main stream and tributary in 2013. The matter-element model for water quality assessment is established with things, characteristic and value as matter-element. According to the Environmental quality standards for surface water and the measured data,a water quality assessment matrix is built. Then the value of weight factor is determined through variation coefficient, and the overall water quality grade of a river can be calculated. The results show that the water quality grade of 36 monitoring point from Baitabuhe River is Ⅲ~Ⅴ, and the river can be divided into three section:Rural region、Town region、Urban region. Their water quality was polluted gradually in turn. For example, the water quality grade of rural region was Ⅲ level but near to II level, that of Town region is Ⅲlevel. The urban region is fundamental Ⅲ upper limit Close to Ⅳ.
引文
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