基于变异系数和熵权组合赋权的正态云水质综合评价模型

Water Quality Evaluation Model of Normal Cloud Based on Coefficient Variation and Entropy Weight

针对水质评价的模糊性、随机性及多因子的综合评价问题,将云模型引用至地下水水质评价中,并采用变异系数和熵权组合赋权的方法确定评价指标的权重,建立了组合赋权的正态云模型;之后以徐州市张集镇20眼地下水井为例验证了该模型的有效性。结果表明,20个地下水水样中,11个Ⅲ类水质、9个Ⅱ类水质,与已有研究成果的结论较为一致,表示组合赋权的正态云模型可较好地解决地下水水质综合评价问题。

Cloud model was proposed to deal with the fuzziness and randomness of water quality evaluation.A combination of weighting-cloud model was established based on coefficient of variation and entropy weight.Based on the comprehensive evaluation of groundwater as the research object,the comprehensive evaluation of Zhangji town in Xuzhou City was carried out,which was compared with the existing research results.The results show that 11 samples wereⅢ class water quality,and nine samples wereⅡclass water quality.The conclusion was similar to the existing research results.Therefore,the proposed combination of weighting-normal cloud model can better solve the problem of groundwater quality evaluation.