Stream Rehabilitation – Impact On Water
Quality And Long-term Effectiveness
In An Urban Environment
Author(s)
S. Riley, S. Shrestha & M. Riley
Abstract
Shrimptons Creek is a small catchment in the suburban-commercial area of
North Ryde, New South Wales, Australia. The original channel system was
significantly modified by firstly agricultural, then suburban, and finally
commercial development in its catchment and along the channel. Sewer lines,
uncontrolled stormwater outlets, major road systems with culverts and
significant weed infestation occurred over a period of more than 150 years. The
opportunity was provided to rehabilitate a section of the channel and monitor the
effectiveness of the rehabilitation. It is concluded that the rehabilitation impacted
on the aesthetic amenity of the channel and had some limited effects on water
quality. However, the failure to maintain the system, a problem identified
elsewhere by the authors, has reduced the effectiveness of the rehabilitation
Keywords: urban stormwater pollution, channel rehabilitation, water quality.
1 Introduction
The transition of watersheds from the natural to the urban condition encompasses
the removal of vegetation and canopy, compaction of soils, creation of
impervious surfaces, and alteration of natural drainage networks. These actions
result in increased surface runoff and a change in the hydrologic regime of the
receiving water and also cause change to sediment budgets (Herricks and
Osborne [1]; Henshaw and Booth [2]). Urbanisation also has many damaging
impacts on the chemical and biological systems of the stream.
Keywords
urban stormwater pollution, channel rehabilitation, water quality.
Related Book
Other papers in this volume
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