干旱区生态环境知识资源中心(Arid): Water Resource Assessment of a Complex Volcanic System Under Semi-Arid Climate Using Numerical Modeling: The Borena Basin in Southern Ethiopia

Arid

DOI	10.3390/w12010276
	Water Resource Assessment of a Complex Volcanic System Under Semi-Arid Climate Using Numerical Modeling: The Borena Basin in Southern Ethiopia
	Razack, Moumtaz 1; Furi, Wakgari 2; Fanta, Likissa 3; Shiferaw, Abera 3
通讯作者	Razack, Moumtaz
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:1
英文摘要	The Borena basin is located in southern Ethiopia, in a semi-arid climate, on the eastern shoulder of the south Main Ethiopian Rift (MER). The study area covers 18,000 km(2) and is characterized by a lack of perennial surface waters that can be used for domestic and agricultural purpose. As a result, groundwater, which occurs in complex volcanic settings, is the only source for water supply in the study area. This work is focused on the basaltic aquifers, which are intensely fractured, resulting in strong connectivity within the system. All available data (geology, hydraulic head, hydraulic parameters, well inventory and discharge, etc.) were compiled in a GIS database. The overall objective of this work is the assessment of groundwater potential, its spatial distribution and factors controlling its movement using numerical groundwater modeling to enhance groundwater management and use in the Borena basin. The modeling task was conducted at two scales: (i) regional scale; (ii) wellfields scale. The regional steady state model was calibrated using the Pilot points approach, highlighting a strongly heterogeneous system. A significant result of the regional model consisted of estimating the water balance of the whole system. The total inflow to the basin amounts to 542 x 10(6) m(3)/year, of which 367 x 10(6) m(3)/year are provided by superficial recharge. Groundwater resources are exploited with 7 wellfields. Exploitation of the wellfields was optimized based on the Sustainable Yield concept, which reserves a fraction of natural recharge for the benefit of the environment (surface waters, ecosystems). Each wellfield was extracted from the regional model, refined and used to simulate and optimize pumping scenarios, with the objective of maximizing discharge rates and avoiding over-exploitation of the groundwater. The optimized abstraction at all wellfields amounts to 121 x 10(6) m(3)/year, which represents 33% of the natural recharge and fully agrees with the sustainable yield concept.
英文关键词	basalts aquifer numerical modeling groundwater management Sustainable Yield Borena basin Ethiopia
类型	Article
语种	英语
国家	France ; Ethiopia
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000519847200276
WOS关键词	REGIONAL GROUNDWATER-FLOW ; HYDRAULIC-PROPERTIES ; SAFE YIELD ; AQUIFER ; MODFLOW ; MANAGEMENT ; SIMULATION ; UNCERTAINTY ; DYNAMICS ; IMPACTS
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315710
作者单位	1.Univ Poitiers, UMR CNRS 7285, 5 Rue Albert Turpain, F-86073 Poitiers, France; 2.Addis Ababa Univ, Nat Sci & Computat Fac, Ctr Environm Sci, Addis Ababa, Ethiopia; 3.Oromia Water Works Design & Supervis Enterprise, Addis Ababa, Ethiopia
推荐引用方式 GB/T 7714	Razack, Moumtaz,Furi, Wakgari,Fanta, Likissa,et al. Water Resource Assessment of a Complex Volcanic System Under Semi-Arid Climate Using Numerical Modeling: The Borena Basin in Southern Ethiopia[J],2020,12(1).
APA	Razack, Moumtaz,Furi, Wakgari,Fanta, Likissa,&Shiferaw, Abera.(2020).Water Resource Assessment of a Complex Volcanic System Under Semi-Arid Climate Using Numerical Modeling: The Borena Basin in Southern Ethiopia.WATER,12(1).
MLA	Razack, Moumtaz,et al."Water Resource Assessment of a Complex Volcanic System Under Semi-Arid Climate Using Numerical Modeling: The Borena Basin in Southern Ethiopia".WATER 12.1(2020).