Nowadays software
packages that are commonly used in urban drainage design
offer a water quality modelling tool in addition to their
hydrodynamic modelling software. The availability of these
modelling tools opens up possibilities for an enhanced
design and management of urban drainage systems, involving
measures that are based on quality aspects rather than
findings merely based on hydrodynamic understandings.
In managing the impact of storm water overflows on the
receiving water, measures in urban drainage design nowadays
mainly rely on considerations based on the results generated
by hydrodynamic modelling tools. Establishing water quality
models using these tools can give a lot of useful information
on e.g. the pollutant load that is transported to the
wastewater treatment plant. The impact of sediment accumulation
in the sewer system (reduction of hydraulic capacity and
the resulting raise of overflow events) as well as the
amount of pollutants that is discharged into the receiving
water can also be studied. However, prior to using these
quality modelling tools it is of paramount importance
to know what these modelling tools actually do and how
they represent the physical, chemical and biological processes
that occur in the sewer system. The commercial urban drainage
software packages HydroWorks (Wallingford Software, UK)
and Mouse (DHI, Denmark) have been evaluated.
This research was sponsored
by Aquafin and Severn
Trent.
Full paper 'In sewer sediment
transport models' (2002) at 3rd International Conference
on Sewer Processes and Networks, Paris, France.
Full paper 'In sewer sediment
and pollutant transport models' (2002) at 9th International
Conference on Urban Drainage, Portland, US.
Nederlandstalig artikel 'Kwaliteit
huidige vuiluitworpmodellen : resultaten van een vergelijkend
onderzoek' (2002) in Rioleringswetenschap
en -techniek.
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