Influence of urban forms on surface flow in urban pluvial flooding

peer reviewedThis paper presents a systematic analysis of the influence of nine urban characteristics (distance be-tween buildings, mean building size, building coverage, etc.) on surface flow in case of pluvial flooding. Time dependent stored volumes, outflow discharges and mean water depths were comput-ed for a set of 2,000 synthetic urban forms, considering various terrain slopes and return periods of the rainfall. An efficient porosity-based surface flow model was used to compute the 2D flow varia-bles. Statistical analysis of the relationship between the flow and urban variables highlights that the flooding severity is mostly influenced by the building coverage.ARC FloodLan