干旱区生态环境知识资源中心(Arid): Interaction of focused recharge and deep groundwater discharge near a wetland: A study in the Ordos Basin, China

Arid

DOI	10.1016/j.jhydrol.2023.130361
	Interaction of focused recharge and deep groundwater discharge near a wetland: A study in the Ordos Basin, China
	Shi, Jia-Xin; Jiang, Xiao-Wei; Zhang, Zhi-Yuan; Zhang, Yi-Peng; Wang, Xu-Sheng; Wan, Li
通讯作者	Jiang, XW ; Zhang, ZY
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2023
卷号	626
英文摘要	Groundwater mounds and depressions induced by rainfall and evapotranspiration near wetlands/lakes have been widely observed, but their effects on groundwater flow field are poorly known. Here, a sandy hillslope near a wetland in the Ordos Plateau, China, which has a semi-arid climate, is selected for investigation. After identifying temporary groundwater mounds/depressions based on three water level observation wells, a HYDRUS-2D model is setup to obtain the highly transient daily flow field. The variable thickness of unsaturated zone near the wetland, which controls soil water content and unsaturated hydraulic conductivity, is found to be responsible for groundwater mounds resulting from focused recharge and groundwater depressions resulting from nonuniform evapotranspiration. On nonrainy days, evapotranspiration in the lowland is supported by flowpaths from regional groundwater discharge, and in the slope is supported by a flow cell from the upland to the upper part of the slope, which causes water table recession in the upland. On rainy days, focused recharge in the lowland leads to two temporary local flow cells, which break the regional groundwater discharge flowpaths into two temporary flow cells. The two temporary flow cells toward the upland contribute to water table rises in the uplandMoreover, we find focused recharge in rainy days does not change the overall direction of flowpaths controlled by regional groundwater discharge and strong evapotranspiration, but only increase the tortuosity of flowpaths. By coupling daily atmospheric conditions and regional groundwater discharge, this study has implications for groundwater recharge estimation and future groundwater modelling in arid regions.
英文关键词	Groundwater mounds Focused recharge Stagnation point Flowpaths Hillslope
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001116552700001
WOS关键词	SURFACE WATER INTERACTIONS ; HYDRAULIC CONDUCTIVITY ; THEORETICAL-ANALYSIS ; BOREAL PLAINS ; FLOW ; LAKES ; ZONE ; FLUCTUATIONS ; DISPERSION ; REVERSALS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397422
推荐引用方式 GB/T 7714	Shi, Jia-Xin,Jiang, Xiao-Wei,Zhang, Zhi-Yuan,et al. Interaction of focused recharge and deep groundwater discharge near a wetland: A study in the Ordos Basin, China[J],2023,626.
APA	Shi, Jia-Xin,Jiang, Xiao-Wei,Zhang, Zhi-Yuan,Zhang, Yi-Peng,Wang, Xu-Sheng,&Wan, Li.(2023).Interaction of focused recharge and deep groundwater discharge near a wetland: A study in the Ordos Basin, China.JOURNAL OF HYDROLOGY,626.
MLA	Shi, Jia-Xin,et al."Interaction of focused recharge and deep groundwater discharge near a wetland: A study in the Ordos Basin, China".JOURNAL OF HYDROLOGY 626(2023).