Geography and Environmental Studies

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Browsing Geography and Environmental Studies by Subject "Addis Ababa"

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    Urban Households’ Vulnerability to Flooding Hazards in Addis Ababa A Case Study from Ginfle Stream
    (Addis Ababa University, 2018-12) Birhanu, Selamawit; Lika, Tebarek (PhD)
    The prime objective of this study was to investigate urban households’ vulnerability to flooding hazards in Addis Ababa with more emphasis to the households and areas along Ginfile Stream. To achieve this objective a two-time series satellite image of 2002 TM and 2008 were analyzed by using Arc GIS 10.3.1 mainly meant for analyzing the status and dynamics of land use land cover (LU/LC) as a cause for flooding hazards, and the level of inundation. Additionally, the main adverse impacts of the flooding hazards were analyzed by using key informant interview (KII), focus group discussion FGD) and field observation. Five land use classes were identified along the stream such as built-up areas, vegetation lands, open lands, water bodies and agricultural lands. The LULC dynamics in the area was found to be very high, leaving the area vulnerable to flooding. The open land had decreased by 10.44% from 2002 to 2018. Both agricultural and vegetation lands have also shown decreased by 74.27% and 35.19%, respectively; whereas the built up area increased by 36.65%. The result of the purposely selected informants and discussants reveal that flooding in Ginfile catchment and its adverse impacts are very high due to high urbanization which changed the vegetation cover in to buildings and industries as most of the time manufacturing industries built along the riverside. In addition to flooding hazards, the river is becoming source of pollution in the area as various types of wastes are disposed in it. This has become a serious health problem for the population along the riverside and still not given proper attention by the city administration. Based on the result of this study, the following issues are recommended: upgrading the infrastructure in the area in terms of building durable flooding barriers in the catchments or capacitating the existing barriers. Most importantly, Drainage Master Plan must be in place so as to serve Addis Ababa City and other small towns around the city. Keywords: Urban flooding, urban, land use/land cover, GIS/RS, Ginfle, Addis Ababa,