Author(s): R. Abdalla; Z. Chen; G. H. Huang; Y. A. El Awad
Linked Author(s): Zereng Chen
Keywords: GIS; Risk assessment; Flood; Simulation
Abstract: This research introduces an integrated approach for flood risk assessment through GIS. The developed approach is based on an integration of hydrologic simulation and GIS analysis. This integration of GIS and hydrologic simulation analysis allowed visualization and spatial based prediction of flood disaster. Specifically, (1) the Hydrologic Engineering Center River Analysis System (HEC-RAS) model was employed to simulate multi-scenario flood cases within a Canadian context; (2) the dimensional stream channel model was constructed based on geometry obtained from Digital Elevation Model (DEM), and (3) Arc View GIS software was used for producing water surface grids, and Triangular Irregular Network (TIN) model was utilized for the study area based on Digital Terrain Model (DTM). A real case study application of the developed model has been conducted for a section of Qu’Appelle River in Southern Saskatchewan. The results of this application have indicated that the developed methodology is efficient in modeling and visualizing the spatial extend of different flood scenarios and in determining areas at risk over certain time periods. In the case of the study section of Qu’Appelle River, it was clear that changes in water surface elevations made areas down stream of the channel at more risk. The considerable presence of creeks along the study section has significantly shared in taking the access amount of flow.
Year: 2002