南水北调中线工程核心水源区生态服务价值变化研究

Changes on eco-service value in central water source area of Middle Route of South-to-North Water Diversion Project

南水北调中线工程已正式开始向北方输水,研究核心水源区的生态服务价值,可以为合理利用自然资源,保护生态环境提供重要的参考依据.该文确定了南水北调中线工程核心水源区范围,在分析生态服务价值评估方法的基础,评估了核心水源区生态服务价值,并从生态服务价值生态系统差异、区域差异、变化率以及空间分布等方面,分析了20多年来核心水源区生态服务价值的变化特征:全流域生态系统服务价值呈逐年递增的趋势;单位面积生态服务价值最高的子流域为官渡河流域、堵河流域与霍河流域,丹江流域与老灌河流域最低;老灌河流域、丹江流域、天河流域变化趋势最好,潭口河流域最差;中南部生态服务价值高于西南、东南部,北部最低.

Middle Route of South-to-North Water Diversion Project has diverted water to north. Research on the eeo-service value in central water source area provides reference for rational utilization of natural resources and protecting the ecological environment. This paper determined the range of Middle Route of South-to-North Water Diversion Project, evaluated eco-service value in central water source area based on analyzing the ecological service value evaluation method. And it analyzed the ecological service value change characteristics for more than twenty years of the central water source, from the several aspects of ecosystem differences, regional difference, rate of change and spatial distribution and so on. The whole watershed ecosystem services value gradually increa- ses. The sub-basins with the highest per unit area ecosystem service value include Guan- du river basin, Duhe river basin and Hohe river basin. The lowest includes Danjiang riv- er basin and Laoguan river basin. The Sub-basins with the best variation trend include I.aoguan river basin, Danjiang river basin and Tianhe river basin. The worst is Tankou river basin. Ecological service value in south-central is higher than both the southwest and southeast, while north is the lowest.