The Evolution of Groundwater Flow Systems in the Quaternary of Hebei Plain since the Last Glacial Maximum
详细信息
- 责任者：Zhang Renquan (School of Environmental Studies ; China University of Geosciences ; Wuhan 430074 ; China) ; Liang Xing
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(3)
- 关键词：地下水系统 ; groundwater system ; 河北 ; Hebei Province
- 页码：p.217-226
- 图表：illus., 1 table, 31 refs.
- 分类号：1701
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Based on historical analysis of regional geography and geology with the confirmed evidences from environmental isotopes and succeeding change of continental salinized salt water,it is found that the groundwater flow systems in the Quaternary of Hebei Plain have undergone three major evolution stages since the Last Glacial Maximum.In the low sea level stage of 18-15 ka BP,groundwater recharge from abound rainfall almost fully replaced the original water in the Quaternary aquifers,and the regional flow system developed.In the period of sea level sharply rising stage of 15-12 ka BP,the flow driven force weakened as the result of topographic potential differences decreased;the early intermediate flow systems penetrating to the third aquifer developed and the regional flow system tended to be stagnant.From the stage of 2.5 ka BP to the present,the present fluvial morphology formed,the topographic potential differences between mountain and sea decreased continually,and the potential differences between high river beds and low river beds or depressions became the dominated flow driven force,so that the late intermediate flow systems penetrating to the first and second aquifers developed.Along with sea level rising,the penetrating depth of later flow systems being less than the former,thus,the later partly cut and superimposed on the former.At present,it is a temporal and spatial assemblage of groundwater flow systems of different evolution stages in the Quaternary of Hebei Plain.Such a scene might be seen in other costal basin,even in inland basin if the erosion weakened with time.The continental salinized saline water originated in around 12 ka BP,resulting in saline water and soil salinization by upward flow,is the key negative factor in water resources management and in ecology and environment protection of Hebei Plain.
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