干旱区生态环境知识资源中心(Arid): Focused groundwater recharge in a tropical dryland: Empirical evidence from central, semi-arid Tanzania

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DOI	10.1016/j.ejrh.2021.100919
	Focused groundwater recharge in a tropical dryland: Empirical evidence from central, semi-arid Tanzania
	Seddon, David; Kashaigili, Japhet J.; Taylor, Richard G.; Cuthbert, Mark O.; Mwihumbo, Catherine; MacDonald, Alan M.
通讯作者	Taylor, RG (corresponding author), UCL, Dept Geog, Gower St, London WC1E 6BT, England.
来源期刊	JOURNAL OF HYDROLOGY-REGIONAL STUDIES
EISSN	2214-5818
出版年	2021
卷号	37
英文摘要	Study region: Little Kinyasungwe Catchment within the River Wami Basin of central, semi-arid Tanzania. Study focus: Groundwater and its replenishment via recharge are critical to sustaining livelihoods and poverty alleviation in tropical drylands yet the processes by which groundwater is replenished remain inadequately observed and resolved. Detailed observations are examined from central Tanzania, where the Makutapora Wellfield supplies freshwater to the rapidly growing, capital city of Dodoma. New hydrological insights for the region: The prominence of focused recharge from ephemeral stream discharges is shown from: (1) groundwater recharge correlates more strongly with the seasonal duration of ephemeral stream stage exceeding a threshold than seasonal rainfall; (2) hourly monitoring of groundwater-levels and stream stage shows that sustained groundwater level rises, indicative of groundwater recharge, correspond better to observed pulses of stream discharge from intensive rainfall observed upstream of the wellfield than rainfall recorded proximate to piezometers; and (3) stable isotope ratios of O and H indicate similar compositions of groundwater and ephemeral streamflow; both have undergone evaporative enrichment and are linked to intensive (90th percentile) daily rainfall. This characterisation of focused groundwater recharge from intensive rainfall in this tropical dryland highlights the potential resilience of groundwater resources to climate change amplifying precipitation extremes and informs strategies to augment replenishment of groundwater supplying the city of Dodoma.
英文关键词	Groundwater recharge Dryland Hydrometric observations Climate change Water supply Stable isotopes
类型	Article
语种	英语
开放获取类型	Green Published, gold, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000701882000004
WOS关键词	CRYSTALLINE BASEMENT ; CLIMATE-CHANGE ; AFRICA ; VARIABILITY ; INFILTRATION ; PRECIPITATION ; RAINFALL ; AQUIFER ; MODEL ; AREA
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/2XILL650/363940
作者单位	[Seddon, David; Taylor, Richard G.] UCL, Dept Geog, Gower St, London WC1E 6BT, England; [Kashaigili, Japhet J.] Sokoine Univ Agr, Dept Forest Resources Assessment & Management, Morogoro, Tanzania; [Cuthbert, Mark O.] Cardiff Univ, Sch Earth & Environm Sci, Cardiff, Wales; [Cuthbert, Mark O.] Univ New South Wales UNSW, Sch Civil & Environm Engn, Sydney, NSW, Australia; [Cuthbert, Mark O.] Cardiff Univ, Water Res Inst, Cardiff CF10 3AT, Wales; [Mwihumbo, Catherine] Minist Water & Irrigat, POB 456, Dodoma, Tanzania; [MacDonald, Alan M.] Lyell Ctr, British Geol Survey, Edinburgh, Scotland
推荐引用方式 GB/T 7714	Seddon, David,Kashaigili, Japhet J.,Taylor, Richard G.,et al. Focused groundwater recharge in a tropical dryland: Empirical evidence from central, semi-arid Tanzania[J]. University of London,2021,37.
APA	Seddon, David,Kashaigili, Japhet J.,Taylor, Richard G.,Cuthbert, Mark O.,Mwihumbo, Catherine,&MacDonald, Alan M..(2021).Focused groundwater recharge in a tropical dryland: Empirical evidence from central, semi-arid Tanzania.JOURNAL OF HYDROLOGY-REGIONAL STUDIES,37.
MLA	Seddon, David,et al."Focused groundwater recharge in a tropical dryland: Empirical evidence from central, semi-arid Tanzania".JOURNAL OF HYDROLOGY-REGIONAL STUDIES 37(2021).