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
No Thumbnail Available
Date
2022-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
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.
Description
Keywords
Calibration, GIS, Modeling, Remote sensing, SWAT, Validation