基于灰色关联度的TOPSIS模型在秦岭生态功能区水土保持治理效益评价中的应用

采用熵值法确定TOPSIS的指标权重，利用灰色系统理论，构建了灰色关联度的TOPSIS评价模型，并根据陕西省秦岭生态功能区近10 a水土流失与治理资料实例验证了该法的有效性，定量评价揭示了该区水土保持治理效益动态变化情况，并采用灰色聚类法加以验证。结果表明:秦岭实施生态环境保护措施初期，各项措施尚未完善、发挥作用相对滞后，水土流失未得到有效控制；随着各项功能措施的逐步深入，水土保持治理效益大幅度提升，与初期相比，治理效益指标增长1.24倍，生态环境逐步向良性发展，有利于秦岭生态功能的改善。该评价方法体系的提出为区域水土保持措施有效开展提供了新的思路，也可为政府决策与综合管理、宏观调控提供科学的理论依据。

Application of TOPSIS Model to Beneficial Evaluation of Soil and Water Conversation of Qinling Ecological Function Region Based on Gray Correlation Degree

In order to solve the determination of the index weight in TOPSIS model, an entropy method was put forward to calculate the index weight, and then gray system theory was combined to construct a TOPSIS evaluation model based on the gray correlation degree. According to ten years of related data on soil and water loss and governance of Qinling region, the effectiveness of this method was finally proven. The quantify evaluation model explored the dynamic state of soil and water conversation in Qinling ecological function region, and was tested by gray clustering. The results showed that soil and water loss had not effectively controlled at the early stage of implementation on ecological environmental protection measures because the measures were not perfect and its roles were relative lag. With various measures gradually deepening, the harness benefit of soil and water conservation was greatly promoted, and its index rose 1.24 times compared to the initial stage. The gradual development of ecological environment benefit was conducive to the improvement of the Qinling ecological functions. The evaluation methodology provided new ideas for the effectiveness of regional soil and water conservation measures, and can provide the reliable basis for government decision-making and comprehensive management, macro-control in Qinling ecological function region.