Flood events can be caused by heavy rainfall, dam breaks, incapable or limited drainage, levee breaches, river overflow, individually or due to a combination of them. There is one more factor that greatly affects the intensity of flood, which is infiltration. Rural and urban areas, due to land cover, stand opposite in the infiltration aspect. This paper presents initial development for exploring the urban flooding challenges. Firstly, a 2D Zero inertia model is tested with cases involving two-dimensional flows and results are presented. Next, Saint Venant’s equation with the TVD-MacCormack scheme is tested for dam-break flow. By coupling these two developed models, an interaction between channel and floodplain is modeled to predict flooding scenarios under similar situations. To model the floodplain, the 2D zero-inertia (shallow water equation) equation and 1D Saint-Venant’s equation for the channel are used. The interaction is modeled through a discharge linking equation. This developed coupled computational model is finally tested with a hypothetical test case and shows a satisfactory result. This model still needs more validation for its further development.