江西省玉山县“七一”水库水质状况评价

Evaluation of Water Quality Status of Qiyi Reservoir in Yushan County,Jiangxi Province

采用熵权综合指数法评价江西玉山县"七一"水库水质状况,首先建立评价矩阵,对矩阵标准化处理后采用熵权法确定各评价时各水质指标所占权重系数,继而在Arcgis 10. 0中对各水质指标进行赋分,分级显示出水库在2013年各季度水质评价图,并对Arcgis中评价结果采用"交叉验证"法对其精度进行验证,结果表明:在评价"七一"水库水质时先采用熵权综合指数法确定各水质指标权重,随后在Arcgis中赋分显示的水质评价图整体效果较好,评价精度也较高;"七一"水库上游至下游水质逐渐变差,至下游断面时水质已不能满足Ⅱ类水质标准。评价结果可为水库水质管理提供轮参考。

This paper uses the entropy weight comprehensive index method to evaluate the water quality of the“July 1”reservoir in Yushan County,Jiangxi Province.Firstly,an evaluation matrix is established.After the matrix is standardized,the entropy weight method is used to determine the weight coefficient of each water quality index in each evaluation,and then in Arcgis.In 10.0,each water quality index was assigned.The water quality evaluation chart of the reservoir in each quarter was graded.The accuracy of the evaluation results in Arcgis was verified by the“cross-validation”method.The results showed that:“July 1”was evaluated.When the water quality of the reservoir is first,the weight of each water quality index is determined by the entropy weight comprehensive index method.The overall water quality evaluation map shown in Arcgis is better and the evaluation accuracy is higher.The water quality of the“July 1”reservoir gradually deteriorates from upstream to downstream.The water quality can no longer meet the Class II water quality standard when it reaches the downstream section.The evaluation results can provide a round reference for reservoir water quality management.