Modeling Of Flood Hazard Management For Forecasting And Emergency Response Of Koka Area Within Awash River Basin Using Remote Sensing And Gis Method

Floods are one of the common natural disasters occurring in many parts of the world. Floodsrnresult in damage to human life, infrastructure and deterioration of the environment. Thernsocio economic and ecological impacts of floods are devastating in Africa and otherrndeveloping countries, because most of them do not have real time forecasting technology orrnresources for post disasters rehabilitation. Flood hazard assessment is based on informationrnon the intensity and frequency of flood events. Flood in Ethiopia is a major problem; itrndestroys life and property every year.rnIn the Awash River basin, especially in upper Awash (Koka) extensive use of the land forrnagriculture and high pressure on the forest for fire wood expose the area for severe floodingrnand erosion during high rainfall. So Flooding has becomes a more common threat for thernpeople living in Awash River basin. Accordingly, the objective of this thesis is preparation ofrnflood hazard map. Since, rainfall is the major force driver of floods, the temporal and spatialrndistribution of precipitation is the key parameter for flood hazard mapping. Using remoternsensing and GIS technology is proved to be the most advanced to identify the flood hazardrnprone areas of a watershed, region, or country in small and large scale. ‘Koka’ area whichrnis a part of Awash River basin is experiencing severe floods for many years due torndeforestation and erratic rainfall pattern. In the present study an attempt is made to identifyrnthe flood prone area by integrating different themes which has direct and indirect influencernin occurrence of floods. Topography, soil, drainage, land use/cover and rainfall data arernused to model the flood hazard of ‘Koka’ area within the Awash River basin using SatelliternRemote Sensing data and GIS technology. GIS technology is one of the new technologiesrnused to collect, store, analyze and display large amount of spatially distributed information.rnUsing the above data a GIS based hazard map is prepared,rnthis can be used for decision making process in the emergency response in flood disaster.

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