常年灌溉地带节水灌溉效益评估——基于动态可拓TOPSIS法  

Application of Dynamic Extension Weighting TOPSIS Method in Comprehensive Evaluation of Regional Water Saving Irrigation

作　　者：尤敏[1] 吴凤平[1] 沈俊源 

机构地区：[1]河海大学规划与决策研究所,南京211100

出　　处：《节水灌溉》2017年第6期73-76,共4页Water Saving Irrigation

基　　金：国家自然科学基金面上项目(41271537);国家社会科学基金重大项目(12&ZD214)

摘　　要：针对节水灌溉效益评估中定性与定量指标不相容以及评价过程过度依赖主观判断的问题,借助动态可拓赋权并结合改进后的TOPSIS法增加客观性,开展了节水灌溉效益评估模型构建和实证分析。调整可拓法中简单关联函数的最优点位置,克服了传统可拓法存在的区间内逆向变化和权重未归一化问题;使用相对熵值替代欧几里得距离,增加了TOPSIS法的稳定性、准确性和可操作性;构建评估模型,并以常年灌溉地带为例,筛选指标、确立等级、输入数据,对其进行了分区域效益评估,评估结果与实际情况及类似研究成果[1]一致。Aiming at the problem that the qualitative and quantitative indicators is incompatible and over-reliance on subjective judgment during evaluation process of regional water-saving irrigation comprehensive effect assessment, with the aid of dynamic extension weighting combi- ning with the improved TOPSIS method to increase the objectivity, the regional water-saving irrigation comprehensive effect evaluation is carried out by constructing model and empirical analysis. Adjusting the position of the best point overcomes the problems of traditional extension method. Using relative-entropy instead of Euclidean distance increases the stability, accuracy and operability of the TOPSIS method. The evaluation model is established with the perennial irrigation area as a case to choose index, establish grade and input data to set sub-regional comprehensive effect evaluation. The results are accord with the actual situation and the results of similar studies.

关 键 词：区域节水灌溉 常年灌溉地带 动态可拓赋权 TOPSIS法 

分 类 号：S274.3[农业科学—农业水土工程] TV93[农业科学—农业工程]