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Spatial and temporal simulation of groundwater recharge and cross-validation with point estimations in volcanic aquifers with variable topography

Alemu Yenehun Beyene (UGent) , Mekete Dessie, Fenta Nigate, Ashebir Sewale Belay, Mulugeta Azeze, Marc Van Camp (UGent) , Derbew Fenetie Taye, Desale Kidane Asmamaw, Enyew Adgo, Jan Nyssen (UGent) , et al.
(2022) JOURNAL OF HYDROLOGY-REGIONAL STUDIES. 42.
Author
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Abstract
Study region: This study is performed for the volcanic aquifers of semi-humid Lake Tana basin in northwest Ethiopia, the source region of Blue Nile basin. Study focus: estimating groundwater recharge at required spatial and temporal scale is a challenge in groundwater management, sustainability and pollution studies. In this study, the physicallybased WetSpass model is applied. The recharge by WetSpass is validated with estimations by water table fluctuation (WTF) and chloride mass balance (CMB) methods. Evaluating the groundwater recharge estimation mechanism for the volcanic aquifers lying at different topographical setting, that represents wide part of the world groundwater aquifers, and suggesting more appropriate methods will benefit different similar studies. New hydrological insights for the region: the mean annual rainfall, recharge, surface runoff, and evapotranspiration are estimated at 1431 mm, 315 mm, 416 mm, and 770 mm, respectively. The recharge varies from 0% to 57% of the rainfall. A high variation is also noted using WTF and CMB methods showing the strong heterogeneous nature of the hydro(meteoro)logical characteristics of the area. WetSpass is effective in aquifers where diffuse recharging mechanism is the predominant type and recharge is controlled by rainfall. Hence, it is found less effective in the storagecontrolled flat floodplain, alluvial and fractured rock aquifer areas. In these areas, the point estimates by the WTF and CMB are effective and can be considered as reliable values.
Keywords
Earth and Planetary Sciences (miscellaneous), Water Science and Technology, Lake Tana basin, Recharge, WetSpass, WTF, CMB, Storage controlled, Diffuse recharge, BLUE NILE BASIN, LAKE TANA, WATER-BALANCE, SOURCE REGION, RUNOFF, CATCHMENT, SYSTEM, FLUCTUATION, RESOURCES, EVOLUTION

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MLA
Beyene, Alemu Yenehun, et al. “Spatial and Temporal Simulation of Groundwater Recharge and Cross-Validation with Point Estimations in Volcanic Aquifers with Variable Topography.” JOURNAL OF HYDROLOGY-REGIONAL STUDIES, vol. 42, 2022, doi:10.1016/j.ejrh.2022.101142.
APA
Beyene, A. Y., Dessie, M., Nigate, F., Belay, A. S., Azeze, M., Van Camp, M., … Walraevens, K. (2022). Spatial and temporal simulation of groundwater recharge and cross-validation with point estimations in volcanic aquifers with variable topography. JOURNAL OF HYDROLOGY-REGIONAL STUDIES, 42. https://doi.org/10.1016/j.ejrh.2022.101142
Chicago author-date
Beyene, Alemu Yenehun, Mekete Dessie, Fenta Nigate, Ashebir Sewale Belay, Mulugeta Azeze, Marc Van Camp, Derbew Fenetie Taye, et al. 2022. “Spatial and Temporal Simulation of Groundwater Recharge and Cross-Validation with Point Estimations in Volcanic Aquifers with Variable Topography.” JOURNAL OF HYDROLOGY-REGIONAL STUDIES 42. https://doi.org/10.1016/j.ejrh.2022.101142.
Chicago author-date (all authors)
Beyene, Alemu Yenehun, Mekete Dessie, Fenta Nigate, Ashebir Sewale Belay, Mulugeta Azeze, Marc Van Camp, Derbew Fenetie Taye, Desale Kidane Asmamaw, Enyew Adgo, Jan Nyssen, Ann Van Griensven, and Kristine Walraevens. 2022. “Spatial and Temporal Simulation of Groundwater Recharge and Cross-Validation with Point Estimations in Volcanic Aquifers with Variable Topography.” JOURNAL OF HYDROLOGY-REGIONAL STUDIES 42. doi:10.1016/j.ejrh.2022.101142.
Vancouver
1.
Beyene AY, Dessie M, Nigate F, Belay AS, Azeze M, Van Camp M, et al. Spatial and temporal simulation of groundwater recharge and cross-validation with point estimations in volcanic aquifers with variable topography. JOURNAL OF HYDROLOGY-REGIONAL STUDIES. 2022;42.
IEEE
[1]
A. Y. Beyene et al., “Spatial and temporal simulation of groundwater recharge and cross-validation with point estimations in volcanic aquifers with variable topography,” JOURNAL OF HYDROLOGY-REGIONAL STUDIES, vol. 42, 2022.
@article{8765660,
  abstract     = {{Study region: This study is performed for the volcanic aquifers of semi-humid Lake Tana basin in northwest Ethiopia, the source region of Blue Nile basin. Study focus: estimating groundwater recharge at required spatial and temporal scale is a challenge in groundwater management, sustainability and pollution studies. In this study, the physicallybased WetSpass model is applied. The recharge by WetSpass is validated with estimations by water table fluctuation (WTF) and chloride mass balance (CMB) methods. Evaluating the groundwater recharge estimation mechanism for the volcanic aquifers lying at different topographical setting, that represents wide part of the world groundwater aquifers, and suggesting more appropriate methods will benefit different similar studies. New hydrological insights for the region: the mean annual rainfall, recharge, surface runoff, and evapotranspiration are estimated at 1431 mm, 315 mm, 416 mm, and 770 mm, respectively. The recharge varies from 0% to 57% of the rainfall. A high variation is also noted using WTF and CMB methods showing the strong heterogeneous nature of the hydro(meteoro)logical characteristics of the area. WetSpass is effective in aquifers where diffuse recharging mechanism is the predominant type and recharge is controlled by rainfall. Hence, it is found less effective in the storagecontrolled flat floodplain, alluvial and fractured rock aquifer areas. In these areas, the point estimates by the WTF and CMB are effective and can be considered as reliable values.}},
  articleno    = {{101142}},
  author       = {{Beyene, Alemu Yenehun and Dessie, Mekete and Nigate, Fenta and Belay, Ashebir Sewale and Azeze, Mulugeta and Van Camp, Marc and Taye, Derbew Fenetie and Asmamaw, Desale Kidane and Adgo, Enyew and Nyssen, Jan and Griensven, Ann Van and Walraevens, Kristine}},
  issn         = {{2214-5818}},
  journal      = {{JOURNAL OF HYDROLOGY-REGIONAL STUDIES}},
  keywords     = {{Earth and Planetary Sciences (miscellaneous),Water Science and Technology,Lake Tana basin,Recharge,WetSpass,WTF,CMB,Storage controlled,Diffuse recharge,BLUE NILE BASIN,LAKE TANA,WATER-BALANCE,SOURCE REGION,RUNOFF,CATCHMENT,SYSTEM,FLUCTUATION,RESOURCES,EVOLUTION}},
  language     = {{eng}},
  pages        = {{21}},
  title        = {{Spatial and temporal simulation of groundwater recharge and cross-validation with point estimations in volcanic aquifers with variable topography}},
  url          = {{http://doi.org/10.1016/j.ejrh.2022.101142}},
  volume       = {{42}},
  year         = {{2022}},
}
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