The Impact of Land Use Change on Addis Ababa Drainage System
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Date
2020-06
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Addis Ababa University
Abstract
Urbanization in Ethiopia has increased population densification along with urban infrastructure
development. Urban growth is linked with the land use change of the city and plays a major role in
changing the Drainage condition. The city is exposed to flash floods. Moreover, extensive land use
changes due to housing developments, road and other infrastructure constructions increase the
susceptibility to flooding. This study evaluates the effect of land use change on the Drainage System.
Starting with Satellite image for 1985, 1995 and 2015 of the study areas, land use analysis was executed
using ArcGIS software. Based on the analyzed land use data for different land use scenario, simulation of
rainfall-runoff process is done on 50 sample drainage outlet points using the SWAT Model. The result of
the model which covers the full extent of Addis Ababa Region, showed considerable increase of discharge
and structures designed using older land use data were insufficient for the new land use/land cover
condition. The rate of increase has been presented in different charts which can be use by Designers and
governmental or non-governmental organizations to consider in future design works. In addition, the result
can be a guide for future planning and land use policies and related research on the city drainage system.
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Keywords
Drainage System, Land Use