干旱区生态环境知识资源中心(Arid): Transmission loss estimation for ephemeral sand rivers in Southern Africa

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DOI	10.1016/j.jhydrol.2021.126487
	Transmission loss estimation for ephemeral sand rivers in Southern Africa
	Mathias, Simon A.; Reaney, Sim M.; Kenabatho, Piet K.
通讯作者	Mathias, SA (corresponding author), Univ Durham, Dept Engn, Durham, England.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	600
英文摘要	Ephemeral sand rivers represent an important water resource in Southern Africa. These rivers only flow for a few days in a year. However, much of this water infiltrates the underlying river bed sediments where it is protected from evaporation and utilized by farmers throughout the dry season. Despite their importance, little is known about how much recoverable water is annually stored within the sand. A particular difficulty concerns obtaining reliable estimates of transmission losses (the amount of water that infiltrates the river bed). The objective of this article was to develop an improved methodology for quantifying transmission loss from ephemeral sand rivers by calibrating a lumped rainfall-runoff model to observed river flow data. Fifteen years of daily river flow data were obtained from four sand rivers in Botswana, namely, Shahshe, Ntshe, Tati and Metsimotlhabe. These data were supplemented with meteorological data from AgMERRA (Ruane et al, 2015) and precipitation data from CHIRPS (Funk et al, 2015). Our simplified rainfall runoff model had four unknown parameters including a river bed infiltration factor, a surface storage capacity, a river bed storage and an average river channel width. Posteriori parameter distributions were derived using a GLUE (Beven and Binley, 1992) methodology. Our study confirms that upper and lower bounds for transmission loss can be obtained by calibrating a lumped rainfall runoff model to a single set of river flow gauging data. Transmission loss was found to represent between 55% and 85% of the total surface runoff at these locations.
英文关键词	Sand river Transmission loss Probability distributed model Catchment water balance Arid zone hydrology
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000685246900010
WOS关键词	INFILTRATION ; RECHARGE ; STREAM ; CATCHMENT ; DYNAMICS ; LIMPOPO
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/2XILL650/363917
作者单位	[Mathias, Simon A.] Univ Durham, Dept Engn, Durham, England; [Reaney, Sim M.] Univ Durham, Dept Geog, Durham, England; [Reaney, Sim M.] Univ Durham, Inst Hazard Risk & Resilience, Durham, England; [Kenabatho, Piet K.] Univ Botswana, Dept Environm Sci, Gaborone, Botswana
推荐引用方式 GB/T 7714	Mathias, Simon A.,Reaney, Sim M.,Kenabatho, Piet K.. Transmission loss estimation for ephemeral sand rivers in Southern Africa[J],2021,600.
APA	Mathias, Simon A.,Reaney, Sim M.,&Kenabatho, Piet K..(2021).Transmission loss estimation for ephemeral sand rivers in Southern Africa.JOURNAL OF HYDROLOGY,600.
MLA	Mathias, Simon A.,et al."Transmission loss estimation for ephemeral sand rivers in Southern Africa".JOURNAL OF HYDROLOGY 600(2021).