干旱区生态环境知识资源中心(Arid): Paleochannel groundwater discharge to the River Niger in the Iullemmeden Basin estimated by near- surface geophysics and piezometry

Arid

DOI	10.1007/s12665-023-10861-y
	Paleochannel groundwater discharge to the River Niger in the Iullemmeden Basin estimated by near- surface geophysics and piezometry
	Mahaman, Rabilou Abdou; Nazoumou, Yahaya; Favreau, Guillaume; Ousmane, Boukari Issoufou; Boucher, Marie; Babaye, Maman Sani Abdou; Lawson, Fabrice M. A.; Vouillamoz, Jean-Michel; Guero, Abdou; Legchenko, Anatoly; Taylor, Richard Graham
通讯作者	Mahaman, RA
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2023
卷号	82 期号:9
英文摘要	In drylands, groundwater is often the only perennial source of freshwater to sustain domestic water supplies and irrigation. Knowledge of the pathways and dynamics of groundwater discharge and recharge is, therefore, essential to inform sustainable and rational management of limited water resources. The lower valley of the Dallol Maouri in Niger represents a large fossil tributary (i.e. paleochannel) of the River Niger and drains groundwater regionally from the Iullemmeden Basin through coarse-grained Quaternary sediments. The objective of this paper is to quantify groundwater discharge within this paleochannel using piezometry and near-surface geophysics (TDEM: Time Domain Electromagnetics, MRS: Magnetic Resonance Sounding). TDEM and MRS experiments, conducted at 21 sites along 3 transects, show the thickness of the saturated Quaternary alluvium varies from 7 to 19 m with estimated effective porosities ranging from 18 to 38% and a hydraulic conductivity of 0.6-3 x 10(-3) m/s. Dense piezometric surveys along drainage channel reveal hydraulic gradients of 0.2-0.3 parts per thousand that generate Darcy fluxes of 1000-2000 m(3)/day (dry season, i.e. minimum value). Paleochannel discharge, which currently provides baseflow to the River Niger, is the focus of local demand to increase access to water for drinking, livestock watering, and supplementary irrigation.
英文关键词	Semi-arid area Groundwater flow Alluvial aquifer
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000972074000006
WOS关键词	MAGNETIC-RESONANCE ; WATER-TABLE ; JOINT USE ; MRS ; AQUIFER ; TRANSMISSIVITY ; VARIABILITY ; RECHARGE ; SYSTEM ; SOUTH
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396121
推荐引用方式 GB/T 7714	Mahaman, Rabilou Abdou,Nazoumou, Yahaya,Favreau, Guillaume,et al. Paleochannel groundwater discharge to the River Niger in the Iullemmeden Basin estimated by near- surface geophysics and piezometry[J],2023,82(9).
APA	Mahaman, Rabilou Abdou.,Nazoumou, Yahaya.,Favreau, Guillaume.,Ousmane, Boukari Issoufou.,Boucher, Marie.,...&Taylor, Richard Graham.(2023).Paleochannel groundwater discharge to the River Niger in the Iullemmeden Basin estimated by near- surface geophysics and piezometry.ENVIRONMENTAL EARTH SCIENCES,82(9).
MLA	Mahaman, Rabilou Abdou,et al."Paleochannel groundwater discharge to the River Niger in the Iullemmeden Basin estimated by near- surface geophysics and piezometry".ENVIRONMENTAL EARTH SCIENCES 82.9(2023).