Mon Oct 13, F. Flechtner
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Ramah, Mohamed, Heggy, Essam, Nasr, Ahmed, Toni, Mostafa, Gomaa, Mohamed M., Hanert, Emmanuel, and Kotb, Adel, 2024. Nubian aquifer linkage to the High Aswan Dam Reservoir: Initial assessments of processes and challenges. Journal of Hydrology, 644:131999, doi:10.1016/j.jhydrol.2024.131999.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024JHyd..64431999R,
author = {{Ramah}, Mohamed and {Heggy}, Essam and {Nasr}, Ahmed and {Toni}, Mostafa and {Gomaa}, Mohamed M. and {Hanert}, Emmanuel and {Kotb}, Adel},
title = "{Nubian aquifer linkage to the High Aswan Dam Reservoir: Initial assessments of processes and challenges}",
journal = {Journal of Hydrology},
keywords = {Surface water-groundwater exchanges, High Aswan Dam, Time-domain electromagnetic method, Aeromagnetic survey, Vertical electrical resistivity sounding and water stress},
year = 2024,
month = nov,
volume = {644},
eid = {131999},
pages = {131999},
abstract = "{Egypt, relying heavily on the Nile as its primary water resource, is
facing a rising water budget deficit due to increasing
consumption, hydroclimatic changes, and upstream river damming.
To address the above, innovative management of High Aswan Dam
Reservoir (HADR), the third largest artificial reservoir on
Earth, and its exchange with the surrounding groundwater system
is suggested to develop new agricultural areas. However, the
interconnectivity mechanism between the HADR and the fossil
Nubian aquifer, the largest transboundary aquifer in Africa,
remains speculative due to the lack of in-situ investigations.
To address this deficiency, we perform a geophysical survey
using aeromagnetic, time-domain electromagnetic, and vertical
electrical resistivity sounding in a 330 km<SUP
loc=``post''>2</SUP> pilot area to the northwest of the HADR
that is hypothesized to have a dense fracture system that could
act as a conduit between these two large water bodies. Our
survey results show the presence of normal faults cross the
reservoir to the tangential basement and the sedimentary cover
that are water-saturated and act as recharges to the Nubian
fossil aquifer. These in-situ investigations confirm previous
orbital gravity observations by GRACE-FO hypothesizing the
interconnectivity between the reservoir and the Nubian aquifer,
which was subject to debate. We suggest that such connecting
areas between these two water bodies can be optimal sites for
future agricultural development using improved management of
surface water-groundwater exchanges for irrigation. Finally, our
findings highlight upcoming challenges for this linkage if the
level of HADR reaches below {\ensuremath{\sim}}160 m above mean
sea level (amsl) due to upstream dam operation during the Nile's
extended drought periods. Under these conditions, the Nubian
aquifer could discharge back into the HADR at the investigated
site, changing the water budget of the aquifer and compromising
the planned agriculture developments in the adjacent areas,
which account for {\ensuremath{\sim}} 10 \% of the total arable
land in Egypt.}",
doi = {10.1016/j.jhydrol.2024.131999},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024JHyd..64431999R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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