Title: Hydrogeology and groundwater flow in a basalt-capped Mesozoic sedimentary series of the Ethiopian highlands
Authors: Vandecasteele, Ine ×
Nyssen, Jan
Clymans, Wim
Moeyersons, Jan
Martens, Kristine
Van Camp, marc
Gebreyohannes, Tesfamichael
Desmedt, Florimond
Deckers, Seppe
Walraevens, Kristine #
Issue Date: 2011
Publisher: Verlag Heinz Heise
Series Title: Hydrogeology Journal vol:19 issue:3 pages:641-650
Abstract: A hydrogeological study was undertaken in the
Zenako-Argaka catchment, near Hagere Selam in Tigray,
northern Ethiopia, during the rainy season of 2006. A
geological map was produced through geophysical measurements
and field observations, and a fracture zone
identified in the north west of the catchment. A perched
water table was found within the Trap Basalt series above
the laterized upper Aram Aradam Sandstones. A map of
this water table was compiled. Water-level variation
during the measurement period was at least 4.5m.
Variation in basal flow for the whole catchment for the
measurement period was between 12 and 276m3/day. A groundwater flow model was produced using Visual
MODFLOW, indicating the general direction of flow to
be towards the south, and illustrating that the waterways
have only a limited influence on groundwater flow. The
soil water budget was calculated for the period 1995–
2006, which showed the important influence of the
distribution of rainfall in time. Although Hagere Selam
received some 724mm of rainfall per year over this period,
the strong seasonal variation in rainfall meant there was a
water deficit for on average 10months per year
ISSN: 1431-2174
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Geography & Tourism
Division Soil and Water Management
× corresponding author
# (joint) last author

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