Numerical analysis and evaluation of groundwater recession in a flood detention basin |
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| Authors: | XU Jun-xiang WANG Shao-juan LI Chang-suo XING Li-ting |
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| Institution: | 1.Shandong Provincial Bureau of Geology and Mineral Resources, Jinan 250013, China. ;2.No. 801 Brigade of Hydrogeology and Engineering Geology, Shandong Provincial Bureau
of Geology and Mineral Resources, Jinan 250014, China. ;3.School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China. |
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| Abstract: | This study analyzes the groundwater environment in the Yangzhuang flood detention basin in Henan Province, China. A numerical model of groundwater flow is established based on the hydrogeological conditions in the basin and changes of groundwater level in the flood detention basin under flood detention and recession conditions. The results show that during flood diversion and storage, the groundwater level in the basin rises, mainly in four flood detention zones, with a maximum rise of 1.0 m. After the floodwater recedes, the groundwater level slowly drops in the detention basin along with flood discharge, finally returning to its original level fifty days later. This study indicates that groundwater recession in the flood detention basin is a slow process, where the rise of groundwater level may cause environmental problems such as soil swamping. |
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| Keywords: | Flood detention basin Numerical method Groundwater level Recession analysis |
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