River basins may have gauged and ungauged catchments. To determine flow contributions from the catchments distributed parameter modeling is required. Geographic Information System (GIS) can handle spatially varied parameters efficiently and is useful in developing IUH/UH for watersheds. Multiple inflows routing model can integrate a number of upstream flows to compute the common downstream flow rate on the basis of several upstream flows. This book describes flood flow modeling for river systems having a number of gauged and ungauged watersheds. Flow contribution from the ungauged watersheds...

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...