Thesis Open Access

Recharge Estimation Using WetSpass Model in Northeastern Upper Jemma River Catchment, Abay Basin, Ethiopia.

Misganaw Gonbis

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<oai_dc:dc xmlns:dc="" xmlns:oai_dc="" xmlns:xsi="" xsi:schemaLocation="">
  <dc:creator>Misganaw Gonbis</dc:creator>
  <dc:description>This study is conducted Northeastern upper Jemma River catchment, which is located in
the Abay Basin. Though groundwater serves as the main safe drinking water supply source
in the study area, there were no detail study in the recharge amount and distribution. The
main objective of this thesis is to quantify the amount and spatial distribution of
groundwater recharge over study catchment using the WetSpass model. As input to the
model: -precipitation, potential evapotranspiration, temperature, and wind speed were
estimated using data collected from meteorological stations located within and nearby the
Catchment, the physical environmental data including land use, soil type, and groundwater
depth are evaluated from field observation and existing maps. Slope and topography were
generated from DEM data. Input data for the model were prepared in the form of grid maps
using 100m grid size and the parameter attribute tables were adjusted to represent the
catchment condition using scientific literature. The results of the model showed that the
long-term average annual rainfall of 1118 mm was partitioned to 271 mm (24%) of surface
runoff, 612 mm (55%) of evapotranspiration, and 235 mm (21%) of recharge. The model
output is found to be comparable with recharge estimation in nearby areas having similar
climatic and physical characteristics. Finally, the study result provides baseline information
for water resource experts and policymakers of the region for further investigation of water
resources, design, sustainable developmental activities, and for land use managing and
planning purposes. It is concluded that the groundwater recharge estimation using the
WetSpass model is reasonable and useful for quantification of annual groundwater
recharge with spatial and seasonal variation.</dc:description>
  <dc:subject>Groundwater Recharge, WetSpass, Northeastern Upper Jemma, Abay Basin</dc:subject>
  <dc:title>Recharge Estimation Using WetSpass Model in Northeastern Upper Jemma River Catchment, Abay Basin, Ethiopia.</dc:title>
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