JOURNAL OF NATURAL RESOURCES ›› 2012, Vol. 27 ›› Issue (4): 686-696.doi: 10.11849/zrzyxb.2012.04.014

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Changing Characteristics and Influencing Causes of Groundwater Level in the Lower Reaches of the Heihe River

AO Fei1,2, YU Jing-jie1, WANG Ping1, ZHANG Yi-chi1   

  1. 1. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-01-27 Revised:2011-09-29 Online:2012-04-20 Published:2012-04-20

Abstract: In order to research the changing characteristics of groundwater level depth in the lower reaches of the Heihe River, we selected six monitoring wells along the Donghe River and the Xihe River, used statistical method combining with Mann-Kendall and Mann-Whitney trend test methods to analyze the groundwater level depth data, observed three times per month (from 1990 to 2009) in Ejina in this paper. We found that the mean groundwater level depth is lower in the upper and the middle parts of the two rivers during this time. The groundwater level depth had been increased obviously in the lower part, while it declined not obviously in the upper and middle parts. All the groundwater dynamics of monitoring well changed after 2000, but happened in different years. The main conclusions are as follows: environmental flow controls project put into effect in 2000 is the basic reason for lifting groundwater level, but shortage in water conveyance quantity and water pumping for irrigation in the middle and lower reaches in the area led to constant decrease of groundwater level. What we find is important for assessment and management of environmental flow controls project, furthermore, the conclusions can also guide further research on the groundwater restoration and ecological rehabilitation.

Key words: the lower reaches of the Heihe River, groundwater level depth, environmental flow controls project

CLC Number: 

  • P641.2 Z