Washoff Model Of Total Suspended Particles
In Urban Areas
Author(s)
E. Crobeddu, S. Allali & S. Bennis
Abstract
Urban runoff pollution due to suspended particles is of great concern for sewer
system managers. This paper presents a new conceptual model called RQSM
(Runoff Quality System Model) used to simulate the washoff (erosion and
transport of particle) of total suspended particles (TSS) at the outlet of urban
catchments. The RQSM model was validated with the help of 285 TSS data
points monitored during 22 rainfall events. Four rainfall events were monitored
in the subcatchment (1) of Verdun borough in Canada and 18 rainfall events
were monitored on three subcatchments in Champaign city (USA). The
simulated loads of the RQSM model were compared to the simulated loads
obtained with the \“rating curve” model and with the SWMM exponential
washoff model. The performance criteria showed that the results given by the
RQSM model are equivalent to the results given by the rating curve model and
the SWMM exponential washoff model. A sensitivity analysis that was
conducted on the RQSM model places of interest the influence of every
parameter on the simulated loads.
Keywords: urban catchment, total suspended particles, build-up, washoff,
comparative study.
1 Introduction
One of the municipality’s interests is minimising the impact due to the pollution
of stormwater in the natural environment. For real-time management of sewers
network, the knowledge of the pollutograph associated to a rainfall event appears
necessary to maximize the interception of pollutants. The estimation of the
quantities of washoff suspended solids in the outlet of catchment allows
Keywords
urban catchment, total suspended particles, build-up, washoff,
comparative study.
Related Book
Other papers in this volume
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