标准差因子赋权法在生态评价综合指数中的应用

Application of Standard Deviation Factor Weighting Method in Ecosystem Assessment on Comprehensive Index

以内蒙古黄土丘陵沟壑区生态系统健康评价为实例,按照指标体系评价法,运用层次分析法和标准差因子赋权法从生态系统活力、组织结构、系统服务功能和土壤健康等方面进行了计算和分析,并与采用专家调查赋权法的结果相比较。结果表明,标准差因子赋权法是成功的,能把一些在原生植被区、人工治理区和退化未治理区三区上差异较大的指标突出出来,也能够把研究的三区的指数值明显区别开来。从各层指标值的情况来看,最后三区的指数值和差异与实际情况基本相符,标准差因子赋权法比专家调查赋权法更客观,更精确,更贴近实际。

The index system assessment method, analytic hierarchy process method and standard deviation factor weighting method were used to analysis on the health assessment of ecology system in the hill and gully area of the Loess Plateau, Inner Mongolia from the aspects of ecosystem activity, organizing fraraework, system service and soil health, etc. Comparison on the result by standard deviation factor weighting method and that by expert investigation weighting method shows that the former is successful. It can stand out the indexes that have the larger difference among three areas of intact vegetation, reconstructed vegetation and severely degraded vegetation and obviously distinguish the index value of three areas. The final index value and difference are dosed to practical instance, indicating that this method is more objective, exacte and close to practice than the expert investigation weighting method.