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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12055

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
Preko, Kwasi
Gyawu, Emmanuella Serwaa
Obiri-Danso, Kwasi
Keywords: Hydro-climate
Water resource management
Climate change
SWAT model
Issue Date: 24-Jul-2019
Publisher: Journal of Hydrology: Regional Studies
Citation: Journal of Hydrology: Regional Studies, 10.1016
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: Regional Studies and also available at https://doi.org/10.1016/j.ejrh.2019.100620
URI: 10.1016/j.ejrh.2019.100620
Appears in Collections:College of Science

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