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|Title: ||The impact of climate and land-use changes on the hydrological processes of Owabi catchment from SWAT analysis|
|Authors: ||Amekudzi, L.K.|
Osei, Marian Amoakowaah
Wemegah, David Dotse
Gyawu, Emmanuella Serwaa
Water resource management
|Issue Date: ||Jul-2019|
|Publisher: ||Journal of Hydrology|
|Citation: ||Journal of Hydrology, Regional Studies 25 (2019) 100620|
|Abstract: ||Study region: The 69 km2 Owabi catchment in Ghana.
Study focus: The Soil-Water-Assessment-Tool (SWAT) was used to assess the hydro-climatic
variability resulting from anthropogenic activities from 1986 to 2015. Specifically, the model
simulated historic and projected stream-flow and water balance. Future stream-flow projections
were modelled for three climate ensembles under three different representative concentration
pathways (RCPs) for two land-use categories.
New hydrological insights for the region: Initial results revealed that forest and topography played
major role in water loss, whereas evapotranspiration and surface runoff were the dominant
modulating processes. Monthly calibration/validation of the model yielded acceptable results
with NSE, R2, PBIAS and RSR values of 0.66/0.67, 0.67/0.67, 8.2%/8.0% and 0.59/0.58 respectively.
Uncertainty was fairly low and the model enveloped about 50% of the observed
stream-flow. The RCP projections for all land use categories showed decreasing rainfall and
streamflow trends. The model proved efficient in determining the catchment hydrology parameters
and has potential to be used for further modelling of water quality and pollution to aid in
effective water management.|
|Description: ||This article is published in Journal of Hydrology and also available at www.elsevier.com/locate/ejrh|
|URI: ||www.elsevier.com/locate/ejrh The|
|Appears in Collections:||College of Science|
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