中文摘要：

跨流域调水是解决我国区域水资源配置的重要手段与途径,也是21世纪全球水系统计划科学前沿和我国北方水资源安全保障关注的重点问题.本文研讨了与气候变化与跨流域调水联系的陆地水系统概念,分析了与环境变化问题联系的国际发展态势.以跨长江、黄河、海河流域的南水北调中线调水区和北京受水区为典型区域,论述我国南水北调重大调水工程实施对陆地水循环影响及水资源安全保障研究关键科学问题,提出该复杂性问题研究的若干重点、研究途径与方法.

英文摘要：

Water diversion project across basins is one of important approaches to solve regional water resources allocation in China,which is also scientific frontal of the Global Water System Project（GWSP） and key issue of water security in North China.This paper addresses the issue of land water system related to climate change and water diversion project from South to North in China.Based on relative international development in this field and case study of the middle road of water diversion project from South to North in China,three issues are analyzed and discussed,that are key scientific issues,distributed water system model and impact evaluation of water project and climate change on water security in water diversion region and getting water region in China.It is shown that climate change and human activity such as the water diversion project from South to North in China will be key issues for large scale water allocation.Water system will be good approach to understand impact of environmental change on regional water security.