城市河流生态健康评价体系构建研究

在分析城市河流生态系统健康状况的基础上,概括了河流生态系统健康概念的含义,并从水安全、水生态、水经济3个方面构建了城市河流生态健康的递阶层次结构和评价指标体系,运用层次分析法对影响城市河流生态健康的各个指标进行权重计算和排序,得到了影响城市河流生态健康最主要的因素是非生物系统和生物系统,其中非生物系统又起主导作用,在非生物系统中河床基质、水岸交换力所占的权值又最大;在生物系统的结构、活力、恢复力3个指标中结构对城市河流生态健康的影响最大。

Establishment of an urban river ecological health evaluation system

Based on the present healthy status of urban river ecosystem, river ecosystem health was defined and a stepwise hierarchy structure and evaluation index system was developed using indicators of water safety, aquatic ecology and water economy. The hierarchy, analysis process was used to conduct weight computation and sorting of the Indicators affecting urban river ecosystem health. It is concluded that, of the primary non-biological and biological factors, the non- biological factors are more important. The weights of riverbed sediment and the exchange force between water and shore .are higher than those of other non-biological factors, while, in the biological system, structure, vitality and resilience are the three factors that have the greatest impacts on the ecological health of urban rivers.