南水北调中线工程受水区生态补水目标及优先级研究

Targets and priorities of ecological water supplement in water-receiving region of middle route of South-to-North Water Diversion Project

立足于南水北调中线工程生态补水调度的实际需要,以南水北调中线工程受水区水资源三级区为基本单元,从生态条件、水文条件以及人类活动影响等方面构建评价指标体系,对水资源三级区进行生态水文分级,为研究中线受水区生态补水目标及优先级别提供依据;在分析生态补水目标确定原则的基础上,依据南水北调中线工程生态补水方式,初步界定中线工程生态补水对象主要有三类:湿地、地下水、河流;最后根据水资源三级区生态水文分级结果,确定南水北调中线工程受水区生态补水目标及优先级别。

Based on the ecological water supplement operation requirements for the water-receiving region of the middle route of the South-to-North Water Diversion Project（MR-SNWDP）,and considering the third grade zone according to the Water Resources Regionalization in the water-receiving region in the MR-SNWDP,an evaluation index system was established that takes into account ecological conditions,hydrological conditions,and the impact of human activities,and eco-hydrological classification was conducted in the third grade zone of water resources. The classification of the third grade zone of water resources provided foundations for determining the targets and priorities of ecological water supplement.On the basis of analysis of the principle of determining the ecological water supplement targets,three types of supplement objects,wetlands,groundwater,and rivers,were preliminarily defined according to the modes of ecological water supplement in the MR-SNWDP.The targets and priorities of the ecological water supplement were finally determined according to the classification results of the third grade zone of water resources in the MR-SNWDP.