Mon Oct 13, F. Flechtner
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Abdelmohsen, Karem, Sultan, Mohamed, Yan, Eugene, Abotalib, Abotalib Z., Save, Himanshu, Emil, Mustafa, Elhaddad, Hesham, and Abdelmalik, Karim, 2024. Watching the Grand Ethiopian Renaissance Dam from a distance: Implications for sustainable water management of the Nile water. PNAS Nexus, 3(7):pgae219, doi:10.1093/pnasnexus/pgae219.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024PNASN...3E.219A,
author = {{Abdelmohsen}, Karem and {Sultan}, Mohamed and {Yan}, Eugene and {Abotalib}, Abotalib Z. and {Save}, Himanshu and {Emil}, Mustafa and {Elhaddad}, Hesham and {Abdelmalik}, Karim},
title = "{Watching the Grand Ethiopian Renaissance Dam from a distance: Implications for sustainable water management of the Nile water}",
journal = {PNAS Nexus},
year = 2024,
month = jun,
volume = {3},
number = {7},
eid = {pgae219},
pages = {pgae219},
abstract = "{Increased demands for sustainable water and energy resources in densely
populated basins have led to the construction of dams, which
impound waters in artificial reservoirs. In many cases, scarce
field data led to the development of models that underestimated
the seepage losses from reservoirs and ignored the role of
extensive fault networks as preferred pathways for groundwater
flow. We adopt an integrated approach (remote sensing,
hydrologic modeling, and field observations) to assess the
magnitude and nature of seepage from such systems using the
Grand Ethiopian Renaissance Dam (GERD), Africa's largest
hydropower project, as a test site. The dam was constructed on
the Blue Nile within steep, highly fractured, and weathered
terrain in the western Ethiopian Highlands. The GERD Gravity
Recovery and Climate Experiment Terrestrial Water Storage
(GRACETWS), seasonal peak difference product, reveals
significant mass accumulation (43 {\ensuremath{\pm}} 5 BCM) in
the reservoir and seepage in its surroundings with progressive
south-southwest mass migration along mapped structures between
2019 and 2022. Seepage, but not a decrease in inflow or increase
in outflow, could explain, at least in part, the observed drop
in the reservoir's water level and volume following each of the
three fillings. Using mass balance calculations and GRACETWS
observations, we estimate significant seepage (19.8
{\ensuremath{\pm}} 6 BCM) comparable to the reservoir's
impounded waters (19.9 {\ensuremath{\pm}} 1.2 BCM).
Investigating and addressing the seepage from the GERD will
ensure sustainable development and promote regional cooperation;
overlooking the seepage would compromise hydrological modeling
efforts on the Nile Basin and misinform ongoing negotiations on
the Nile water management.}",
doi = {10.1093/pnasnexus/pgae219},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024PNASN...3E.219A},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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