Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin

Study region: The Lake Tana sub-basin, upper Blue Nile, Ethiopia Study focus: The Lake Tana sub-basin is one of the agricultural growth corridors for Ethiopia’s ambitious plan to expand irrigation. Despite the booming irrigation activities in the sub-basin, limited information exists on the rate of...

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Autores principales:	Meron Teferi Taye, Alemseged Tamiru Haile, Addisalem Genet Fekadu, Prossie Nakawuka
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Small-scale irrigation Dry season flow Water abstraction Lake Tana sub-basin Water balance Physical geography GB3-5030 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/2c44e3d05ec2487b8ec66ae1e859ef00
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id	oai:doaj.org-article:2c44e3d05ec2487b8ec66ae1e859ef00
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spelling	oai:doaj.org-article:2c44e3d05ec2487b8ec66ae1e859ef002021-11-18T04:49:01ZEffect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin2214-581810.1016/j.ejrh.2021.100961https://doaj.org/article/2c44e3d05ec2487b8ec66ae1e859ef002021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214581821001907https://doaj.org/toc/2214-5818Study region: The Lake Tana sub-basin, upper Blue Nile, Ethiopia Study focus: The Lake Tana sub-basin is one of the agricultural growth corridors for Ethiopia’s ambitious plan to expand irrigation. Despite the booming irrigation activities in the sub-basin, limited information exists on the rate of irrigation expansion and its impact on the water balance of the sub-basin. This study collected and organized smallholder irrigation data in the sub-basin to identify the actual irrigated area, the abstracted irrigation water, and its implications on seasonal water availability. The area under small-scale irrigation was estimated through data obtained from 'woredas’ (districts) databases. Crop patterns were obtained through field surveys. Irrigation water abstracted at daily timescale was measured. New hydrological insights for the Region: In the sub-basin, 38,694 ha was under small-scale irrigation in 2020/21. Surface water is the dominant water source, and it supplies about 80% of irrigation withdrawal. Water abstraction for small-scale irrigation is about 430 MCM per dry season (~50% of dry season flow). The eastern side of the sub-basin faces water shortages as the dry season flow is not sufficient for irrigation. With the prospects of more irrigation expansion, small-scale irrigation water withdrawals pose concerns of water scarcity at local level and to the water balance of the sub-basin. Hence, there is urgent need for adaptive management of the small-scale irrigation effect on the sub-basin’s hydrology.Meron Teferi TayeAlemseged Tamiru HaileAddisalem Genet FekaduProssie NakawukaElsevierarticleSmall-scale irrigationDry season flowWater abstractionLake Tana sub-basinWater balancePhysical geographyGB3-5030GeologyQE1-996.5ENJournal of Hydrology: Regional Studies, Vol 38, Iss , Pp 100961- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Small-scale irrigation Dry season flow Water abstraction Lake Tana sub-basin Water balance Physical geography GB3-5030 Geology QE1-996.5
spellingShingle	Small-scale irrigation Dry season flow Water abstraction Lake Tana sub-basin Water balance Physical geography GB3-5030 Geology QE1-996.5 Meron Teferi Taye Alemseged Tamiru Haile Addisalem Genet Fekadu Prossie Nakawuka Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin
description	Study region: The Lake Tana sub-basin, upper Blue Nile, Ethiopia Study focus: The Lake Tana sub-basin is one of the agricultural growth corridors for Ethiopia’s ambitious plan to expand irrigation. Despite the booming irrigation activities in the sub-basin, limited information exists on the rate of irrigation expansion and its impact on the water balance of the sub-basin. This study collected and organized smallholder irrigation data in the sub-basin to identify the actual irrigated area, the abstracted irrigation water, and its implications on seasonal water availability. The area under small-scale irrigation was estimated through data obtained from 'woredas’ (districts) databases. Crop patterns were obtained through field surveys. Irrigation water abstracted at daily timescale was measured. New hydrological insights for the Region: In the sub-basin, 38,694 ha was under small-scale irrigation in 2020/21. Surface water is the dominant water source, and it supplies about 80% of irrigation withdrawal. Water abstraction for small-scale irrigation is about 430 MCM per dry season (~50% of dry season flow). The eastern side of the sub-basin faces water shortages as the dry season flow is not sufficient for irrigation. With the prospects of more irrigation expansion, small-scale irrigation water withdrawals pose concerns of water scarcity at local level and to the water balance of the sub-basin. Hence, there is urgent need for adaptive management of the small-scale irrigation effect on the sub-basin’s hydrology.
format	article
author	Meron Teferi Taye Alemseged Tamiru Haile Addisalem Genet Fekadu Prossie Nakawuka
author_facet	Meron Teferi Taye Alemseged Tamiru Haile Addisalem Genet Fekadu Prossie Nakawuka
author_sort	Meron Teferi Taye
title	Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin
title_short	Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin
title_full	Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin
title_fullStr	Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin
title_full_unstemmed	Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin
title_sort	effect of irrigation water withdrawal on the hydrology of the lake tana sub-basin
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2c44e3d05ec2487b8ec66ae1e859ef00
work_keys_str_mv	AT meronteferitaye effectofirrigationwaterwithdrawalonthehydrologyofthelaketanasubbasin AT alemsegedtamiruhaile effectofirrigationwaterwithdrawalonthehydrologyofthelaketanasubbasin AT addisalemgenetfekadu effectofirrigationwaterwithdrawalonthehydrologyofthelaketanasubbasin AT prossienakawuka effectofirrigationwaterwithdrawalonthehydrologyofthelaketanasubbasin
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Effect of irrigation water withdrawal on the hydrology of the Lake Tana sub-basin

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