摘要
针对传统单一赋权方法的缺陷,将AHM主观权重和CRITIC客观权重相结合,构建AHM-CRITIC耦合权重;采用TOPSIS排序方法,量化样本与评价标准之间的相对关系,建立水质评价模型。选取COD-Mn、TN、TP、NH-3-N、DO、pH 6项指标作为评价因子,将该模型应用于小兴凯湖进行水质评价。AHM-CRITIC评价结果中Ⅱ类水占20,Ⅲ类水、Ⅳ类水各占10,Ⅴ类水占60,表明湖水水质整体较差;且由于水体富营养化现象严重,当地居民应科学排灌、文明发展旅游业以改善水环境。将AHM-CRITIC、AHM和CRITIC三种赋权方法进行对比,可得优化后模型能够有效避免主观权重极值和客观权重“不灵敏”的问题,提升整体评价精度与适应性,具有一定的应用价值。
Aiming at the shortcomings of the traditional single weighting method,the AHM subjective weighting and the CRITIC objective weighting were combined to construct the AHM-CRITIC coupling weighting method.The TOPSIS ranking method was also used to quantify the relative relationship between samples and the evaluation standard,and a water quality evaluation model was established.Six indexes of CODMn,TN,TP,NH3-N,DO and pH were selected as evaluation factors,and the model was applied to the water quality evaluation of Xiaoxingkai Lake.In the AHM-CRITIC evaluation results,ClassⅡwater accounts for 20%,ClassⅢwater and Class IV water account for 10%each,and ClassⅤwater accounts for 60%,indicating that the water quality is generally poor.Because the eutrophication of the water body is serious,local residents should improve their water environment by scientific drainage and irrigation and developing tourism in a civilized way.Comparing the three weighting methods of AHM-CRITIC,AHM and CRITIC,it shows that the optimized model can effectively avoid the problem of“insensitive”of subjective weight extreme value and objective weight,and improve the overall evaluation accuracy and adaptability,which has certain application value.
作者
郑恺原
向小华
ZHENG Kai-yuan;XIANG Xiao-hua(College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China)
出处
《节水灌溉》
北大核心
2020年第9期79-83,共5页
Water Saving Irrigation
基金
国家重点研发计划(2016YFA0601000)
国家级大学生创新训练项目(201910294006Z)。
作者简介
郑恺原(1999-),男,硕士研究生,研究方向为水务工程,E-mail:kyzheng196@163.com;通讯作者:向小华(1981-),男,副教授,博士,研究方向为水文过程模拟,E-mail:xxhxiang@hhu.edu.cn。
