The Manning River Basin is located on the mid-north coast of NSW. The catchment covers an area of approximately 8,190 square kilometres. All of the rivers and creeks in the Manning valley are unregulated and therefore most water users rely on natural flows for their water supplies. The major tributaries of the Manning catchment flow in a south-easterly direction through alluvial valleys before entering the Manning River. The river itself flows over a length of 250 kilometres, with an average annual discharge of 2,230,000 ML. In the lower reaches, the river is tidal and is often saline to Abbotts Falls near Wingham. A weir on the Barmond River allows up to 20000 ML to be tranfserred to the Hunter Basin above Glenbawn Dam for use by Macquarie Power.
The Manning River Basin (208) ARCE was moderately modified and the ARCB was significantly impaired. The basin condition was non-assessed by the hydrological disturbance index, moderately modified based on the catchment disturbance index, largely unmodified based on the habitat index and moderately modified based on the nutrient and suspended load index.
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Environment Index scores compared to Biota Index scores for all reaches.
- Exit to more information on the AUSRIVAS for an introduction, models, taxonomy and downloads.
- Assessment of River Condition: and audit of the ecological condition of Australian rivers (by R. Norris, I. Prosser, B. Young, P. Liston, N. Bauer, N. Davies, F. Dyer, S. Linke, and M. Thoms)(PDF 4418 KB)
- View the Audit's Australian Catchment, River and Estuary Assessment 2002
- View the Audit's Australian Agriculture Assessment 2001
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