Scenarios for redesigning an urban drainage system to reduce runoff frequency and restore stream ecological condition

Details

Serval ID
serval:BIB_4A1A5AB7727D
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Title
Scenarios for redesigning an urban drainage system to reduce runoff frequency and restore stream ecological condition
Title of the conference
International Conference on Urban Drainage Modelling and the 4th International Conference on Water Sensitive Urban Design: Book of proceedings
Author(s)
Ladson A.R., Lloyd S., Walsh C.J., Fletcher T.D., Horton P.
Publisher
International Water Association
ISBN
0646459031
Publication state
Published
Issued date
2006
Editor
Delectic A., Fletcher T.
Pages
769-776
Language
english
Abstract
Monitoring the hydrochemical efficiency of urban stormwater treatment
devices is not straightforward as the traditional, automated, In
urban areas, efficient drainage of impervious surfaces means that
polluted stormwater is frequently delivered to streams. Commonly,
catchment urbanization can increase runoff frequency by a factor
of 10 or more, as the effective imperviousness - the proportion of
the catchment that consists of impervious surfaces drained to streams
- is increased. This causes a decline in stream health.
To decrease runoff frequency, effective imperviousness must be reduced.
This requires urban drainage systems to be redesigned, using techniques
such as infiltration and rainwater harvesting, so that stormwater
from small rain events is not piped directly to streams but instead
is infiltrated, reused or retained. We have developed scenarios that
explore alternative urban drainage systems appropriate for a small
partly urbanised catchment in Melbourne's east. These scenarios incorporate,
biofiltration basins, swales and dual purpose rainwater tanks that
supply water for householders. Our results suggested that sufficient
reductions in effective imperviousness and runoff frequency are possible
to achieve improvements in stream health.
Keywords
Stream restoration, runoff frequency, urban drainage
Create date
25/11/2013 19:36
Last modification date
20/08/2019 13:57
Usage data