清河流域水生态系统功能评价及主要驱动因子识别

Assessment of Aquatic Ecosystem Function of Qing River Basin and the Main Factors

以辽宁省铁岭市清河流域为研究区,构建了包括4大类16个因子的水生态系统功能评价指标体系,并结合2000-2007年研究区基础数据,综合运用主成分分析法,熵权综合指数法和相关性分析法对研究区水生态系统功能进行评价并识别主要驱动因子,结果表明:信息功能>生产功能>调节功能>生境功能,主要驱动因子为:水质综合污染指数、底栖动物多样性指数、藻类多样性指数、GDP、粮食总产量、水产品产量、绿化覆盖率和旅游收入,评价结果为功能分区和水资源合理利用、地方经济发展提供了参考和依据。

A system of candidate indices,including 4 classes and 16 factors,was set based on the basic data collected from Qing River Basin in 2000- 2007. Principal component analysis,entropy methods and correlation analysis were used to evaluate the function. The results showed that information function was stronger than production function, regulation function and habitat function,which would provide useful information and foundation for functional division,reasonable use of water and economic development.