Journal article

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

AR Ladson, S Lloyd, CJ Walsh, TD Fletcher, P Horton

Water Practice and Technology | IWA Publishing | Published : 2007


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 infiltra..

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