干旱区生态环境知识资源中心(Arid): The role of superficial geology in controlling groundwater recharge in the weathered crystalline basement of semi-arid Tanzania

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DOI	10.1016/j.ejrh.2021.100833
	The role of superficial geology in controlling groundwater recharge in the weathered crystalline basement of semi-arid Tanzania
	Zarate, E.; Hobley, D.; MacDonald, A. M.; Swift, R. T.; Chambers, J.; Kashaigili, J. J.; Mutayoba, E.; Taylor, R. G.; Cuthbert, M. O.
通讯作者	Zarate, E (corresponding author), Cardiff Univ, Sch Earth & Environm Sci, Main Bldg,Pk Pl, Cardiff CF10 3AT, Wales.
来源期刊	JOURNAL OF HYDROLOGY-REGIONAL STUDIES
EISSN	2214-5818
出版年	2021
卷号	36
英文摘要	Study region: Little Kinyasungwe River Catchment, central semi-arid Tanzania. Study focus: The structure and hydraulic properties of superficial geology can play a crucial role in controlling groundwater recharge in drylands. However, the pathways by which groundwater recharge occurs and their sensitivity to environmental change remain poorly resolved. Geophysical surveys using Electrical Resistivity Tomography (ERT) were conducted in the study region and used to delineate shallow subsurface stratigraphy in conjunction with borehole logs. Based on these results, a series of local-scale conceptual hydrogeological models was produced and collated to generate a 3D conceptual model of groundwater recharge to the wellfield. New hydrological insights for the region: We propose that configurations of superficial geology control groundwater recharge in dryland settings as follows: 1) superficial sand deposits act as collectors and stores that slowly feed recharge into zones of active faulting; 2) these fault zones provide permeable pathways enabling greater recharge to occur; 3) 'windows' within layers of smectitic clay that underlie ephemeral streams may provide pathways for focused recharge via transmission losses; and 4) overbank flooding during high intensity precipitation events increases the probability of activating such permeable pathways. These conceptual models provide a physical basis to improve numerical models of groundwater recharge in drylands, and a conceptual framework to evaluate strategies (e.g., Managed Aquifer Recharge) to artificially enhance the availability of groundwater resources in these regions.
英文关键词	Groundwater recharge Conceptual model Superficial geology Semi-arid Hydrogeology Focused recharge
类型	Article
语种	英语
开放获取类型	Green Accepted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000687247800003
WOS关键词	ELECTRICAL-RESISTIVITY TOMOGRAPHY ; TRANSMISSION LOSSES ; CLIMATE-CHANGE ; AREA ; INFILTRATION ; DYNAMICS ; SOUTHERN ; MODEL ; LAND ; EAST
WOS类目	Water Resources
WOS研究方向	Water Resources
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368571
作者单位	[Zarate, E.; Hobley, D.; Cuthbert, M. O.] Cardiff Univ, Sch Earth & Environm Sci, Main Bldg,Pk Pl, Cardiff CF10 3AT, Wales; [Zarate, E.; MacDonald, A. M.; Swift, R. T.; Chambers, J.] British Geol Survey, Lyell Ctr, Res Av South, Edinburgh EH14 4AP, Midlothian, Scotland; [Swift, R. T.] Univ Liege, Urban & Environm Engn, B-4000 Liege, Belgium; [Kashaigili, J. J.] Sokoine Univ Agr, POB 3013, Morogoro, Tanzania; [Mutayoba, E.] Water Inst, Water Resources Dept, POB 35059, Dsm, Tanzania; [Taylor, R. G.] UCL, Dept Geog, London WC1E 6BT, England; [Cuthbert, M. O.] Univ New South Wales UNSW, Sch Civil & Environm Engn, Sydney, NSW, Australia; [Cuthbert, M. O.] Cardiff Univ, Water Res Inst, Cardiff CF10 3AT, Wales
推荐引用方式 GB/T 7714	Zarate, E.,Hobley, D.,MacDonald, A. M.,et al. The role of superficial geology in controlling groundwater recharge in the weathered crystalline basement of semi-arid Tanzania[J]. University of London,2021,36.
APA	Zarate, E..,Hobley, D..,MacDonald, A. M..,Swift, R. T..,Chambers, J..,...&Cuthbert, M. O..(2021).The role of superficial geology in controlling groundwater recharge in the weathered crystalline basement of semi-arid Tanzania.JOURNAL OF HYDROLOGY-REGIONAL STUDIES,36.
MLA	Zarate, E.,et al."The role of superficial geology in controlling groundwater recharge in the weathered crystalline basement of semi-arid Tanzania".JOURNAL OF HYDROLOGY-REGIONAL STUDIES 36(2021).