基于组合赋权的水土保持生态效应定量评价模型

发布时间：2018-06-12 10:46

本文选题：水土保持 + 生态效应　；参考：《中国农村水利水电》2017年07期

【摘要】：水土保持生态效应评价对了解水土保持措施的合理性、适宜性具有重要意义。根据水土保持生态效应在减少土壤侵蚀、减小地表径流、增加植被覆盖率和改善大气环境等四方面的成效机制,借鉴国内外有关生态效应评价指标体系的研究成果,建立了包含七个指标的评价指标体系,并采用组合赋权法确定各指标权重;针对实施水土保持措施后不同时间段内评价对象的生态响应,引入了指标的响应强度用于评价生态效应四大方面的改善程度,并通过计算评价对象的综合评价值揭示其总体响应趋势。通过对生态效应定量评价模型的实例分析发现,采用组合赋权法确定指标权重更为合理;生态效应中的保土和调水作用响应时间更短;水土保持措施对于改善生态环境是有积极作用的。
[Abstract]:Ecological effect evaluation of soil and water conservation is of great significance to understanding the rationality and suitability of soil and water conservation measures. According to the ecological effects of soil and water conservation in reducing soil erosion, reducing surface runoff, increasing vegetation coverage and improving the atmosphere environment, the paper draws on the study of ecological effect evaluation index system at home and abroad. As a result, the evaluation index system containing seven indexes is established, and the weight of each index is determined by the combined empowerment method. The ecological response of the evaluation objects in different time periods after the implementation of soil and water conservation measures is introduced, and the response intensity of the index is introduced to evaluate the improvement of the four aspects of the ecological effect and the comprehensive evaluation of the evaluation objects. The evaluation value reveals the overall response trend. Through the analysis of the quantitative evaluation model of ecological effect, it is found that the combination weighting method is more reasonable to determine the index weight, and the response time of soil conservation and water regulation is shorter in the ecological effect, and the measures of soil and water conservation have positive effect on improving the ecological environment.
【作者单位】：中国水利水电科学研究院泥沙研究所;
【基金】：水利部公益性行业科研专项经费项目资助(201501045)
【分类号】：S157

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