Flood occurs repeatedly in Ethiopia and cause tremendous losses in terms of property andrnlife, particularly in the lowland areas. The majority of flood disastersâ€™ victims are poor peoplernliving in nearby stretch of floodplain. Therefore, the study was carried out to performrnfloodplain analysis and risk assessment of Fogera and nearby areas. This research involvesrnthe integration of 2D Structured Mesh Generator (CCHE-MESH) and hydrodynamicrnnumerical model (CCHE2D model) with Geographic Information Systems (GIS) to develop arnregional model for floodplain determination and representation.rnThe study describes the flood extent and depth in the area for flow condition derived from thernhistorical flow data of the Rib River. Triangulated Irregular Network (TIN) was preparedrnfrom shape file generated from spot elevations of the floodplain through field survey data andrnthe DEM of the study area in ArcGIS. Triangulated Irregular Network (TIN) is converted tornan ASC II format, which is supported by the CCHE-MESH and CCHE2D model.rnBoundary condition for the inlet is specified as total discharge and discharge hydrograph forrnsteady and unsteady simulation respectively and for the outlet a constant water level of LakernTana (1788m) is specified as a downstream BC which allows for simulation of the free flowrncondition at the river outlet. Initial conditions are defined based on information on gauges orrnthrough introducing a so called warm-up that precedes the actual simulation period andrnboundary conditions are generally specified from hydrometric data such as time series data ofrndischarge and stage or simulated discharge hydrograph.rnMaps of flood Extent, Level, Depth and Velocity are developed using 100 years return periodrnflood. The Flood has the inundation area of 47.13km2 while the simulated flood extent hasrnflood depths less than 5.9m. The depth between 5.9m and 2m is located along the riverrnchannel and on the pond which is located south of the rib river. However, the depths belowrn2m exist largely on the flood plain which extend 4 km and 3 km outside right bank and thernleft bank of the main river respectively. The simulated water level ranges between 1798.4mrnASL at the upstream and 1788m ASL at the downstream end of the main river. Thernsimulation result indicates much of the flooding occur in the middle part of the river wherernthe flow behaviour is mainly dominated by the inflow from the Rib River. Most of the areasrnaround the flood plain are cultivated land with less proportion of Agro-pastoral, Marsh andrnPastoral. 85-90% of the flood inundated areas are covered by agricultural land. Thernremaining 10-15% is covered by Agro-pastoral near inlet to Lake Tana.