Urban channel adjustments in a management context: an Australian example

Area of Science:

• Environmental Science
• Urban Hydrology
• Geomorphology

Background:

• Urbanization causes significant changes to stream channel morphology and function.
• Previous studies have documented the extent of these channel adjustments.
• Spatial context for urban stream channel characteristics is increasingly important for management.

Purpose of the Study:

• To present a rapid field survey method for classifying urban stream channels.
• To illustrate the application of this method in Armidale, NSW, for stormwater management planning.
• To suggest management options based on channel classification.

Main Methods:

• Development and application of a rapid field survey technique.
• Classification of urban stream channels into near natural, adjusted, and channelized systems.
• Integration of channel characteristics, water quantity, and quality into management plans.

Main Results:

• A practical method for depicting urban channel networks was successfully applied.
• The survey enabled the characterization of stream channels within the Armidale urban area.
• Management options were identified for different channel categories.

Conclusions:

• The proposed channel classification system complements stormwater management plans.
• It provides a basis for defining specific management alternatives.
• The system aids in communicating management options for community engagement.