Flood and inundation evaluation using a GIS based hydrological model

In this paper, the SOBEK model was used which combines the function of a one-dimensional channel flow and a two-dimensional overland flow to analyze and present the flood potential of the Hsin-Huwei Creek basin in Taiwan. In the article, the methodology illustrated involved integrating the DTM data and hydrologic data, calibrating both hydrologic and hydraulic models, and producing inundation maps directly usable for planning of flood-prone areas. The GIS was used to perform the tedious and time-consuming tasks of spatial analysis for the 5 m × 5 m resolution DTM data. Using real rainfall data with observed channel stages, the parameters of the model were calibrated. The model was finally used for inundation simulation, and the results were used for inspecting the flood control facilities and drainage systems to reduce flood threats. Keywords Inundation evaluation, GIS, Hydrological model