An analysis of the combined consequences of pluvial and fluvial flooding

摘要

Intense rainfall in urban areas often generates both pluvial flooding due to the limitedncapacity of drainage systems, as well as fluvial flooding caused by deluges from rivernchannels. The concurrence of pluvial and fluvial flooding can aggravate their (individual)npotential damages. To analyse the impact caused by individual and composite type ofnflooding, the SIPSON/UIM model, an integrated 1D sewer and 2D overland flow wasnapplied to numerical modelling. An event matrix of possible pluvial scenarios wasncombined with hypothetic overtopping and breaching situations to estimate the surfacenflooding consequences in the Stockbridge area, Keighley (Bradford, UK). The modellingnresults identified different flooding drivers in different parts of the study area andnshowed that the worst scenarios resulted from synthesised events.