基于TOPSIS法的陕西省黄河流域干旱综合评价模型

Comprehensive evaluation model of drought in the Yellow River of Shaanxi province based on TOPSIS method

干旱是沿黄地区农业发展的长期制约性因素,研究黄河流域典型区域的干旱等级评价方法,建立黄河流域干旱评价模型,科学、客观、准确地评估黄河流域及供水区干旱级别,是做好抗旱工作的前提和基础。采用TOPSIS客观赋权法对各干旱评价指标进行加权,构建一个干旱综合指数,对陕西省黄河流域1999年6月-1999年8月进行干旱综合评价,评价结果与实际情况相符合,证明了评价方法的合理性和可操作性。

In the Yellow River,drought is one of the most outstanding natural disasters in agricultural production,which has become a long-term conditionality factor of agricultural development in the area.Development of the drought grade evaluation method in typical regions of the Yellow River,establishment of the arid evaluation model of the Yellow River,and scientific,objective,and accurate evaluation of the drought level in the Yellow River and water supply area are the premise and foundation of drought relief work.In this paper,TOPSIS objective weighting method was used to assign weights for each drought evaluation index and then to develop a comprehensive drought index,which was used to perform drought analysis in the Yellow River of Shaanxi Province between June 1999 and August 1999.The evaluation results were similar to the actual conditions,which proved the rationality and operability of the evaluation method.