干旱区生态环境知识资源中心(Arid): Hydrological modelling for assessing spatio-temporal groundwater recharge variations in the water-stressed Amathole Water Supply System, Eastern Cape, South Africa Spatially distributed groundwater recharge from hydrological model

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DOI	10.1002/hyp.14264
	Hydrological modelling for assessing spatio-temporal groundwater recharge variations in the water-stressed Amathole Water Supply System, Eastern Cape, South Africa Spatially distributed groundwater recharge from hydrological model
	Nolte, Annika; Eley, Malte; Schoeniger, Matthias; Gwapedza, David; Tanner, Jane; Mantel, Sukhmani Kaur; Scheihing, Konstantin
通讯作者	Nolte, A (corresponding author), Univ Hamburg, Inst Geol, Dept Earth Sci, Bundesstr 55, D-20146 Hamburg, Germany.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2021
卷号	35 期号:6
英文摘要	To increase the resilience of regional water supply systems in South Africa in the face of anticipated climatic changes and a constant increase in water demand, water supply sources require diversification. Many water-stressed metropolitan regions in South Africa depend largely on surface water to cover their water demand. While climatic and river discharge data is widely available in these regions, information on groundwater resources - which could support supply source diversification - is scarce. Groundwater recharge is a key parameter that is used to estimate groundwater amounts that can be sustainably exploited at a sub-watershed level. Therefore, the objective of this study was to develop a reliable hydrological modelling routine that enables the assessment of regional spatio-temporal variations of groundwater recharge to discern the most promising areas for groundwater development. Accordingly, we present a semi-distributed hydrological modelling approach that incorporates water balance routines coupled with baseflow modelling techniques to yield spatio-temporal variations of groundwater recharge on a regional level. The approach is demonstrated for the actively managed catchment areas of the Amathole Water Supply System situated in a semi-arid part of the Eastern Cape of South Africa. In the investigated study area, annual groundwater recharge exhibits a high spatio-temporal heterogeneity and is estimated to vary between similar to 0.5% and 8% of annual rainfall. Despite some uncertainties induced by limited data availability, calibration and validation of the model were found to be satisfactory and yielded model results similar to (point) data of annual groundwater recharge reported in earlier studies. Our approach is therefore found to derive crucial information for efficiently targeting more detailed groundwater exploration studies and could work as a blueprint for orientating groundwater potential exploration in similar environments.
英文关键词	Eastern Cape groundwater groundwater recharge hydrological modelling semi-distributed model South Africa water-stress
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000667549500029
WOS关键词	BASE-FLOW ; BUFFALO RIVER ; MANAGEMENT ; SECURITY ; AQUIFER ; CLIMATE ; BALANCE
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368712
作者单位	[Nolte, Annika] Univ Hamburg, Inst Geol, Dept Earth Sci, Bundesstr 55, D-20146 Hamburg, Germany; [Nolte, Annika; Eley, Malte; Schoeniger, Matthias] Tech Univ Carolo Wilhelmina Braunschweig, Leichtweiss Inst Hydraul Engn & Water Resources, Dept Hydrol Water Management & Water Protect, Braunschweig, Germany; [Gwapedza, David; Tanner, Jane; Mantel, Sukhmani Kaur] Rhodes Univ, Inst Water Res, Makhanda Grahamstown, South Africa; [Scheihing, Konstantin] Oldenburg East Frisian Water Board, Dept Water Resources Management & Rights, Brake, Germany
推荐引用方式 GB/T 7714	Nolte, Annika,Eley, Malte,Schoeniger, Matthias,et al. Hydrological modelling for assessing spatio-temporal groundwater recharge variations in the water-stressed Amathole Water Supply System, Eastern Cape, South Africa Spatially distributed groundwater recharge from hydrological model[J],2021,35(6).
APA	Nolte, Annika.,Eley, Malte.,Schoeniger, Matthias.,Gwapedza, David.,Tanner, Jane.,...&Scheihing, Konstantin.(2021).Hydrological modelling for assessing spatio-temporal groundwater recharge variations in the water-stressed Amathole Water Supply System, Eastern Cape, South Africa Spatially distributed groundwater recharge from hydrological model.HYDROLOGICAL PROCESSES,35(6).
MLA	Nolte, Annika,et al."Hydrological modelling for assessing spatio-temporal groundwater recharge variations in the water-stressed Amathole Water Supply System, Eastern Cape, South Africa Spatially distributed groundwater recharge from hydrological model".HYDROLOGICAL PROCESSES 35.6(2021).