Flood Hazard Assessment Using GIS in Bacho Plain, Upper Awash Valley, Southwest of Addis Ababa

Abebe, Feyissa Chibssa (2007) Flood Hazard Assessment Using GIS in Bacho Plain, Upper Awash Valley, Southwest of Addis Ababa. Masters thesis, Addis Ababa University.

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Flood hazard mapping is used to determine the areas susceptible to flooding when discharge of a stream exceeds the bank-full stage. Using historical data on river stages and discharge of previous floods, along with topographic data, maps can be constructed to show areas expected to be covered with flood waters for various discharges or stages. An effort was made in this study to identify flood hazard areas in Bacho Plain using GIS technology. Bacho Plain is an agricultural potential area in the western extreme of Upper Awash Valley. The area is drained by a number of large perennial rivers which are tributaries of the largest Awash River. The study area is spread within an extent of 1,539 sq km. Bacho Plain experienced flooding problem of different level (very low to moderate) almost every year and major floods every five years for the last two decades. These destructive floods were detrimental to Bacho Plain’s vulnerable social and economic development due to loss of lives and destruction to properties. Settlement areas and agricultural fields are situated along the river banks, which are severally vulnerable to flooding. The main objective of the study was to develop landuse zonation map of Bacho Plain area, and to identify the areas vulnerable to flood. Accordingly classified flood hazard map was developed using GIS and the landuse pattern was identified within the hazard areas. Flood hazard map was classified into five categories very high, high, Moderate, Low and very low. The weighted overlay analyses also showed that most of the cultivated lands, settlements, swampy land areas are in high to very high risk while the remaining are very low to low risk areas.

Item Type: Thesis (Masters)
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Q Science > QE Geology
Z Bibliography. Library Science. Information Resources > ZA Information resources
Divisions: Africana
Depositing User: Selom Ghislain
Date Deposited: 22 Jun 2018 09:04
Last Modified: 22 Jun 2018 09:04
URI: http://thesisbank.jhia.ac.ke/id/eprint/4239

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