Preliminary mapping of inundation in urban areas

Abstract

This paper proposes a methodology aiming to provide a computational tool to outline areas with higher or lower risk of flood for planning a draining system and urban use. A hydrodynamic propagation model was developed by using the MacCormack explicit scheme, making it possible to be applied in urban channels. In the case of inundations, corresponding plates and sections are recorded for further generating the inundation preliminary map with the aid of a topographic software. Tests focused on hydrodynamic propagation in a real channel, stream of the Retiro Saudoso, in the city of Ribeirão Preto, state of São Paulo, having a map representing an estimative flooding area. The final outcome of this work might be used as part of a decision-making support system for authorities as to flood as the program might be applied to estimate and to map flood along a channel. Keywords: hydrodynamic propagation, flooding area, MacCormack scheme, urban drainage, inundation preliminary map.