陕北榆林风沙区防护林体系效益评价研究

Evaluation on Benfit of Shelterbelt Network in Yulin Sandy Area in Northern Shaanxi

在全面调查研究榆林风沙区防护林体系基本特征、经营状况和社会经济状况的基础上,应用层次分析法对榆林风沙区防护林体系综合效益进行了评价研究,结果表明,榆林风沙区防护林体系经过10a的建设和发展,综合效益由1992年的较差(I4级)提高到了2002年的良好水平(I2级)。其中生态效益、经济效益由1992年的较差(I4级)提高到了2002年的良好水平(I2级)。只有社会效益变化极小,基本保持了中等水平。

Analytical hierarchy process was used to evaluate comprehensive benefit of shelterbelt network in Yulin sandy area on the basis of investigating the characteristics and managing status of the shelterbelt and social economic situations. The results indicated that all of the ecological benefits, economic benefits and comprehensive benefit were improved singnificantly form grade I4 (bad) in 1992 to grade I2 (better) in 2002 but the social benefit was kept grade I3 (general).