Authors : A.G. Adeogun, A. Pathirana and M.O. Daramola
Abstract: In order to enable estimation of flood damage due to sewer overflow, a Sewer Network Model (SWMM) was coupled with an Inundation Model (BreZo) based on irregular triangular meshes. SWMM uses a 1D explicit finite difference solver that handles the full shallow water equations. BreZo employs a Godunov-type finite volume algorithm to explicitly solve the shallow water equations. The model coupling was effected by transferring mass (and neglecting momentum) from the Sewer Network Model to the Inundation Model. The flow back into the sewer network during the recession hydrograph from the surface was not considered. The model was evaluated by applying it to a case study taken from the urban drainage system in West Garforth, UK. The model application showed that computational economy was achieved. Also, the coupled model performed well against stability and mass balance criteria.
A.G. Adeogun, A. Pathirana and M.O. Daramola, 2012. 1D-2D Hydrodynamic Model Coupling for Inundation Analysis of Sewer Overflow. Journal of Engineering and Applied Sciences, 7: 356-362.