三峡水库消落带生态系统综合评价指标体系构建

Comprehensive Assessment Index System of Eco-environment of the Water-Level-Fluctuating Zone in the Three Gorges Area

水位周期性波动形成的三峡消落带是位于水陆交错带的一类特殊生态系统,是一条生态脆弱带。如何科学地对这类生态系统进行健康评价是保护与开发这类生态系统的基础。本文在以前学者的研究成果基础上提出了消落带生态系统健康评价的综合指标体系,针对以前学者研究结果中指标差异较大的现实问题,对指标的权重进行了重新分配,用随机的方法构建一批模拟系统检验综合评价模型。结果表明,综合评价模型与以前学者构建的模型偏差较小,可以很好地代替以前的模型。

Water-Level-Fluctuating Zone(WLFZ) in the Three Gorges Area is formed by water level periodic fluctuation.WLFZ system is a transition zone between terrestrial ecosystem and water ecosystem.Because of impact of water level fluctuating,WLFZ system is very fragile.How to scientifically assess the WLFZ system is the basis of protecting and developing this type of ecosystem.Comprehensive assessment index system was proposed based on previous scholars' research results.There was a huge difference among index weights in previous WLFZ assessment papers.Index weight of WLFZ was redistributed,then simulation system constructed by random method was used to test comprehensive assessment model of WLFZ.The results showed that deviation between comprehensive assessment results and previous assessment results was small and comprehensive assessment model can replaced previous assessment models.