摘要
Water is the foundation of an arid ecological system, as the quantity and quality of surface water and groundwater determine its structure and function. The study on the relationship between water and ecosystem is the basis of ecosystem protection. Taking the Ejina delta, an extremely arid area located downstream of the Heihe River in northwestern China, as an example, this article gives an overviewe of the study in three aspects: (1) the groundwater table and salinity dynamics and their driving factors, (2) the groundwater depth and salt threshold of natural vegetation ecosystem, and (3) the impact evaluation of ecological flow control on Ejina natural vegetation. The authors point out the importance of the research into the relation between water and ecosystem and its key difficulties and weakness, and put forward strategies for promoting the study processes.
Water is the foundation of an arid ecological system, as the quantity and quality of surface water and groundwater determine its structure and function. The study on the relationship between water and ecosystem is the basis of ecosystem protection. Taking the Ejina delta, an extremely arid area located downstream of the Heihe River in northwestern China, as an example, this article gives an overviewe of the study in three aspects： （1） the groundwater table and salinity dynamics and their driving factors, （2） the groundwater depth and salt threshold of natural vegetation ecosystem, and （3） the impact evaluation of ecological flow control on Ejina natural vegetation. The authors point out the importance of the research into the relation between water and ecosystem and its key difficulties and weakness, and put forward strategies for promoting the study processes.
基金
supported by the National Key Basic Research Development Program of China (No.2009CB421305)
the National Natural Science Fund of China (No. 91025023)
作者简介
YU Jingjie(1964-),Professor,Deputy Director of the Key Laboratory of Water Cycle&Related Land Surface Processes,the Institute of Geographic Sciences and Natural Resources Research(IGSNRR),CAS.She received her B.Sc.at the Physical Geography Department of Najing University in 1985,her M.Sc.at the former CAS Intitute of Geography in 1988,and her Ph.D at IGSNRR in 2002.Her research fields include watershed hydrology and water resources management.She is the leader of two research projects separately supported by the National Natural Science Foundation of China and the National Basic Research Program(973 Program),focusing on hydrological processes and their impacts on vegetation in Heihe River basin.E-mail:yujj@igsnrr.ac.cn.
