Modeling Land-Use Land-Cover Change and Assessment of its Impacts on Hydrology Using GIS and Remote Sensing Techniques; A Case of Muger Catchment, Ethiopia

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Addis Ababa University


Assessing the impacts of LULC change on hydrology plays a great role in the effective planning and management of hydrological resources of the catchment. The change of LULC has a direct effects on the different hydrological processes that occur during and after rainfall, such as surface discharge, evaporation, evapotranspiration, groundwater infiltration, and surface runoff. Therefore, modeling the land-use land-cover change and assessment of its impacts on hydrology is critically an important issue at the current time. This study deals on modeling the land-use land-cover change and assessment of its effects on the hydrology for Muger catchment by using GIS and remote sensing techniques through integrating with the SWAT hydrological model. It was conducted using the spatio-temporal data such as slope, land-use land-cover, soil, meteorological and hydrological data from the different sources. The maximum likelihood classification, change detection, and SWAT hydrological model was deployed to perform this analysis. Finally, the sensitivity analysis, model calibration, and validation were being conducted. There is a strong relationship between the measured and simulated monthly flows based on the calibration results with the NSE of 0.81 and R2 of 0.86 for Aleltu River; NSE of 0.63 and R2 of 0.84 for Muger River and NSE of 0.66 and R2 of 0.79 for Sibilu River. In addition, the validation result reveals that the measured and simulated flow are in good agreement with the NSE of 0.73 and R2 of 0.89 for Aleltu River; NSE of 0.66 and R2 of 0.88 for Muger River and NSE of 0.87 and R2 of 0.89 for Sibilu River. The change of the LULC is the driving force to change an ecosystem and environmental processes in different ways. Therefore, this study facilitates the society within Muger catchment for conducting proper land management practices as well as proper utilization of the water resources.



Calibration, GIS, Modeling, Remote sensing, SWAT, Validation