Flood is one of the critical hydrological issues and results from the combination of meteorological and hydrological conditions. Floods can have disastrous short and long-term effects on people and their economies. Flood impacts are functions of valley characteristics and dependent not only on the river discharge/flow depths, but also on the topography of the landform around a river section. The top width of flow at a section corresponding to a depth of flow can be determined by using Digital Elevation Models (DEM). River flow models can be redefined using flow top width variable(s) and used...