Pollution wash-off modelling on impervious surfaces: Calibration, validation, transposition

This paper presents the modification and the application of the conceptual wash-off model initially proposed by the SWMM on five separate urban catchm ents with very different characteristics and during a lot of rainfall event s. To allow measurements on real sites to be considered, this model was inc orporated in an overall model including simulation build-up, sediment trans port in collector as well as runoff and hydraulics. This modified model has been calibrated, validated, transposed and completed with sensivity analys is of parameters and initial conditions. The proposed model gives some impr ovement to the results of the initial model: an adaptation to a large range of rainfalls, the correct reproduction of the peak values and satisfying r eproduction of the beginning and the end of the TS pollutograph. (C) 1999 I AWQ Published by Elsevier Science Ltd. All rights reserved.