组合赋权法在河流健康评价权重计算中的应用

Application of combination weighting method to weight calculation in river health evaluation

引进基于博弈论的组合赋权思想,利用主观赋权法(层次分析法)与客观赋权法(熵值法)相结合得到的组合赋权法来计算权重,既避免了主观赋权法的主观性,又避免了客观赋权法的绝对客观性。选取海河流域永定河为研究区,用组合赋权法计算永定河河流健康评价指标体系的权重,从而判断各指标对河流健康的影响程度。研究表明,通过组合赋权法得到的指标权重克服了单一权重的片面性,使得综合评价更合理,更科学,最后得到的结果也较符合实际情况,具有较好的解释性和说明性。

According to the concept of combination weighting based on game theory,the combination weighting method,which combines the subjective weighting method（the analytic hierarchy process method） and the objective weighting method（the entropy method）,was used for weight calculation.This method avoids not only the subjectivity of the subjective weighting method,but also the absolute objectivity of the objective weighting method.The method was used to calculate the weights of indices of the health evaluation index system for the Yongding River in the Haihe Basin and to evaluate the influences of the indices on the river＇s health.The research results show that the weights of the indices obtained by the combination weighting method,compared with a single weight that is unilateral,are more reasonable and scientific,and applicable to actual conditions,indicating that the proposed method plays a practical role in river health evaluation.