Spatial and seasonal water level dynamics in dryland grabens along the Rift Valley of northern Ethiopia
- Author
- Hailemariam Meaza Gebregergs, Biadgilgn Demissie Mullaw (UGent) , Laurens Hermans, Brhanu Haftu, Birhanu Biruk, Jean Poesen, Tesfaalem Gebreyohannes Asfaha, Amanuel Zenebe and Jan Nyssen (UGent)
- Organization
- Abstract
- We investigated water levels in semi-closed grabens of northern Ethiopia. Springs (n = 79), streamflows (n = 48), wetlands (n = 3), endorheic lakes (n = 3), hand-dug wells (n = 48) and boreholes in unconfined aquifers (n = 25) were monitored (2015-2017). Spring discharge fluctuates between wet (2.75 +/- 1.5 L/s) and dry seasons (0.87 +/- 0.21 L/s) (n = 68, p < .0001). Spring discharge and streamflow were larger at the foot of the escarpment than at the horst (p < .001). The water level of wells varied between horsts and escarpments in the grabens (p < .02). A water level depletion of up to 2.23 m/year occurred in response to withdrawals in the irrigated plains. Importantly, water level fluctuation was faster in streams, springs and hand-dug wells than in boreholes. Striking water level variations in the grabens were linked to rainfall deficit and management scarcity. An integration of surface water and groundwater management responses will bring the water table nearer to the surface; this could mitigate water storage in the fertile and productive grabens.
- Keywords
- LAND-COVER CHANGES, SURFACE-WATER, GROUNDWATER LEVEL, CLIMATE-CHANGE, TREND ANALYSIS, VARIABILITY, RESOURCES, SPRINGS, BASIN, FLUCTUATIONS, graben, natural spring, streamflow, dry season, escarpment, Ethiopia
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01H4ZK4N3EZMK6SDGT2XC0F9DB
- MLA
- Gebregergs, Hailemariam Meaza, et al. “Spatial and Seasonal Water Level Dynamics in Dryland Grabens along the Rift Valley of Northern Ethiopia.” HYDROLOGICAL SCIENCES JOURNAL, vol. 67, no. 9, 2022, pp. 1418–38, doi:10.1080/02626667.2022.2085511.
- APA
- Gebregergs, H. M., Mullaw, B. D., Hermans, L., Haftu, B., Biruk, B., Poesen, J., … Nyssen, J. (2022). Spatial and seasonal water level dynamics in dryland grabens along the Rift Valley of northern Ethiopia. HYDROLOGICAL SCIENCES JOURNAL, 67(9), 1418–1438. https://doi.org/10.1080/02626667.2022.2085511
- Chicago author-date
- Gebregergs, Hailemariam Meaza, Biadgilgn Demissie Mullaw, Laurens Hermans, Brhanu Haftu, Birhanu Biruk, Jean Poesen, Tesfaalem Gebreyohannes Asfaha, Amanuel Zenebe, and Jan Nyssen. 2022. “Spatial and Seasonal Water Level Dynamics in Dryland Grabens along the Rift Valley of Northern Ethiopia.” HYDROLOGICAL SCIENCES JOURNAL 67 (9): 1418–38. https://doi.org/10.1080/02626667.2022.2085511.
- Chicago author-date (all authors)
- Gebregergs, Hailemariam Meaza, Biadgilgn Demissie Mullaw, Laurens Hermans, Brhanu Haftu, Birhanu Biruk, Jean Poesen, Tesfaalem Gebreyohannes Asfaha, Amanuel Zenebe, and Jan Nyssen. 2022. “Spatial and Seasonal Water Level Dynamics in Dryland Grabens along the Rift Valley of Northern Ethiopia.” HYDROLOGICAL SCIENCES JOURNAL 67 (9): 1418–1438. doi:10.1080/02626667.2022.2085511.
- Vancouver
- 1.Gebregergs HM, Mullaw BD, Hermans L, Haftu B, Biruk B, Poesen J, et al. Spatial and seasonal water level dynamics in dryland grabens along the Rift Valley of northern Ethiopia. HYDROLOGICAL SCIENCES JOURNAL. 2022;67(9):1418–38.
- IEEE
- [1]H. M. Gebregergs et al., “Spatial and seasonal water level dynamics in dryland grabens along the Rift Valley of northern Ethiopia,” HYDROLOGICAL SCIENCES JOURNAL, vol. 67, no. 9, pp. 1418–1438, 2022.
@article{01H4ZK4N3EZMK6SDGT2XC0F9DB,
abstract = {{We investigated water levels in semi-closed grabens of northern Ethiopia. Springs (n = 79), streamflows (n = 48), wetlands (n = 3), endorheic lakes (n = 3), hand-dug wells (n = 48) and boreholes in unconfined aquifers (n = 25) were monitored (2015-2017). Spring discharge fluctuates between wet (2.75 +/- 1.5 L/s) and dry seasons (0.87 +/- 0.21 L/s) (n = 68, p < .0001). Spring discharge and streamflow were larger at the foot of the escarpment than at the horst (p < .001). The water level of wells varied between horsts and escarpments in the grabens (p < .02). A water level depletion of up to 2.23 m/year occurred in response to withdrawals in the irrigated plains. Importantly, water level fluctuation was faster in streams, springs and hand-dug wells than in boreholes. Striking water level variations in the grabens were linked to rainfall deficit and management scarcity. An integration of surface water and groundwater management responses will bring the water table nearer to the surface; this could mitigate water storage in the fertile and productive grabens.}},
author = {{Gebregergs, Hailemariam Meaza and Mullaw, Biadgilgn Demissie and Hermans, Laurens and Haftu, Brhanu and Biruk, Birhanu and Poesen, Jean and Asfaha, Tesfaalem Gebreyohannes and Zenebe, Amanuel and Nyssen, Jan}},
issn = {{0262-6667}},
journal = {{HYDROLOGICAL SCIENCES JOURNAL}},
keywords = {{LAND-COVER CHANGES,SURFACE-WATER,GROUNDWATER LEVEL,CLIMATE-CHANGE,TREND ANALYSIS,VARIABILITY,RESOURCES,SPRINGS,BASIN,FLUCTUATIONS,graben,natural spring,streamflow,dry season,escarpment,Ethiopia}},
language = {{eng}},
number = {{9}},
pages = {{1418--1438}},
title = {{Spatial and seasonal water level dynamics in dryland grabens along the Rift Valley of northern Ethiopia}},
url = {{http://doi.org/10.1080/02626667.2022.2085511}},
volume = {{67}},
year = {{2022}},
}
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