Groundwater Dynamic Equilibrium Evidence for Changes of Renewability of Groundwater in Beijing Plain
详细信息
- 责任者：Zhai Yuanzheng (College of Water Sciences ; Beijing Normal University ; Beijing 100875 ; China) ; Wang Jinsheng
- 刊名：Journal of Jilin University
- 出版年：2012
- 卷期：42(1)
- 关键词：地下水资源 ; groundwater resources ; 北京 ; Beijing
- 页码：p.198-205
- 图表：6 illus., 3 tables, 15 refs.
- 分类号：1701
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
The aim of this paper is to analyze the spatial and temporal changes of renewability of groundwater in Beijing. The recharge volume,renewing cycle, renewal rate, and recharge rate of groundwater in the Beijing Plain, especially in the mining aquifers, were calculated using groundwater table dynamic equilibrium method. The renewability of groundwater and changes of its spatio-temporal were further evaluated. The results show that, firstly, under natural conditions,the renewability of groundwater is generally strong with a decreasing trend from the piedmont to the central plain. Secondly, the aquifers in this study have favorable boundary conditions for groundwater recharge from exterior and excellent water bearing conditions. Thirdly, the renewability of groundwater in investigated area and all the sub areas have decreased clearly with mean annual groundwater recharge rate during 2001~2008 (0.28 m/a) decreasing by 35.6% compared with that in 1981~2000. Lastly, the mean groundwater level in 2008 is 19.73 m which is deeper than that in natural conditions. The above evidences show that the issue of groundwater sustainable supply is serious in Beijing under the impacts of climate change and human activities.
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