Numerical Simulation and Visualization of Flood Inundation in the Upper Reaches of Huangpu River

An integrated strategy coupling GIS with two-dimension hydrodynamic model is explored to simulate the flooding inundation in the upper reaches of Huangpu River. DEM data, hydraulic engineering map and other available geospatial data are used and aid to generate the computational grid, while, some treatments of interior and exterior boundary conditions, and calculations of variable resistance terms are discussed. Then the hydrodynamic model, Delft3D-Flow, is applied to predict the submerged area, as well as the distribution of water depth and velocity. Finally, the simulated result is processed and the dynamic visual simulation of flooding is developed based on component GIS technology, which will provide scientific methods for experts to make flood risk map and loss assessment.