东辽河流域水生态功能分区研究

流域水生态功能分区是水环境、水生态系统管理的基础。综合考虑东辽河流域自然地理特征、水生态因子、社会经济活动影响和水生态服务功能等,确定了东辽河流域分区指标,运用地理信息系统空间分析和主成分分析等数学方法,对基础空间数据和流域水生态系统特征调查资料进行分析,提出了流域三级水生态功能分区方案,将东辽河流域划分为2个一级分区、4个二级分区、13个三级分区,利用底栖无脊椎动物的相关指标进行聚类分析,表明水生态功能三级分区是合理的。

Study on Aquatic Ecological Function Regionalization in Dongliao River Basin

The aquatic ecological function regionalization at watershed scale is the foundation of the management of water environment and aquatic ecosystem.Considering the geographical features,aquatic ecological factors,impact of socio-economic activities and aquatic ecological functions of the Dongliao River basin,regionalization indexes of aquatic ecological function regionalization in Dongliao River basin had been determined.Through analyzing the basic spatial data and the survey data of the watershed ecosystem characteristics with the Spatial analysis function of ArcGIS and Mathematical methods such as principal component analysis,the three levels division methods of aquatic ecological function regionalization in Dongliao River basin had been proposed.Dongliao River basin was divided into two Grade 1 regions,4 Grade 2 regions and 13 Grade 3 regions.The validity of the Grade 3 regions had been identified by the cluster analysis with the indicators of the benthic invertebrate species and biodiversity data.