层次分析法在退耕还林生态效益评价指标体系建立中的应用

Application of Analytic Hierarchy Process in Index System for Evaluating Ecological Effect of Land Conversion Program

退耕还林生态效益评价是当今研究的热点问题之一,构建评价指标是评价工作的前提和基础。笔者根据退耕还林生态效益的主要影响因子,在设定多层次指标体系的基础上,采用AHP法计算各指标权重,以确定影响退耕还林生态效益的主要因素。结果表明:退耕还林生态效益指标体系19个指标中,所占比重最大的5个指标依次为:土壤的侵蚀模数、地表径流量、土壤容重、枯落物层厚度和林草的覆盖率等。

The research on ecological benefit of evaluation on the land conversion program has been the focus of discussion today, and it＇s the precondition and base to establish the evaluation of index system of ecological benefit measurement. Based on the main influent factors to the ecological benefit of the land conversion program, the authors establish the index system and calculate every factor＇s weight to show the most important factors through AHP. The results show that among the 19 indexes of the system, 5 indexes with the largest weights were ranked as follows., the erosion amount of the forest soil, the surface runoff of the forest,soil bulk density, the thickness of the litter as well as the forest and grass coverage.