基于集对分析模型的水土保持工程效益后评价研究

目的]建立一个科学合理的水土保持效益后评价指标体系对水土保持工程进行效益评价,为小流域的生态治理提供科学后评估依据。方法]综合分析小流域水土保持工程特性和影响水土保持工程效益的关键因素,识别和选取水土保持工程效益后评价的13项关键指标,建立小流域工程效益后评价指标体系,运用层次分析法和熵值法改进评价指标的权重,结合评价指标数据和指标评价标准应用改进的集对分析模型开展工程效益后评价研究。结果]改进的集对分析模型结果表明,评价指标体系中水保效益、生态效益、社会效益,流域水土保持工程效益评价总体处于2级水平,流域治理的成效显著、可供开发的空间和潜力较大。结论]该方法是一种有效地针对小流域的水土保持工程效益评价的新方法。在构建水土保持工程效益后评价指标体系的基础上,将该方法运用到水土保持工程效益后评价中,基本达到了预期的研究目的。

Post-evaluation of Soil and Water Conservation Project Benefits Based on Set Pair Analysis Model

Objective] A scientific and reasonable post-evaluation index system for soil and water conservation project benefits was established, in order to provide a scientific post-assessment basis for ecological management of small watersheds.Methods] According to the comprehensive analysis of the characteristics of soil and water conservation engineering in small watersheds and the key factors affecting the efficiency of soil and water conservation projects, 13 key indicators for post-evaluation of soil and water conservation project were identified and selected, to establish a post-evaluation index system. Analytic hierarchy process(AHP) and the entropy method were used to improve the weight of the evaluation index. Combined with the evaluation index data, the index evaluation criteria was applied to improve set pair analysis model and analyze the post evaluation of project benefits.Results] The improved set pair analysis model showed that the water conservation benefits, ecological benefits and social benefits in the evaluation index system were generally at the level of 2, and the effectiveness of watershed management was significant, and the potential for development was great.Conclusion] The research demonstrates a new method to effectively evaluate the benefit of soil and water conservation projects in small watersheds. The new method is applied to the post-evaluation of soil and water conservation project benefit on the basis of constructing the post-evaluation index system, which basically achieves the expected research purpose.