Course and features
Avon River rises in the northern foothills of the Barrington Tops, south of , and flows generally north-east, joined by five minor tributaries, before reaching its confluence with the Gloucester River, near Gloucester, south of the confluence of the Gloucester River with the Barrington River. The river descends 412 metres (1,352 ft) over its 42 kilometres (26 mi) course.
The catchment area of the river benefits from melting snow in spring. Gloucester district, although incredibly hot in the main summer months, nevertheless has an annual rainfall averaging 1,300 millimetres (51 in). As a result, combined with the merging streams and rivers, periodic serious flooding occurs in the Avon Valley at Gloucester, sometimes cutting all transport links.
In 2004, assessments of water sampling done in 1997 by the NSW Environment Protection Authority, revealed poor water quality, with high levels of nutrients leading to excess algae. Along the river, downstream from Stratford, bank erosion and the invasion by exotic plant species have degraded the river.
- "Map of Avon River, NSW". Bonzle Digital Atlas of Australia. Retrieved 25 February 2013.
- "Avon River". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 25 February 2013.
- Hose, Grant; Turak, Eren. "Mann504 - Avon River downstream of Stratford". River Health in the New South Wales Lower North Coast, Hunter and Central Coast Catchments. Department of Environment, Water, Heritage and the Arts. Retrieved 24 January 2008.
- "Manning River catchments" (map). Office of Environment and Heritage. Government of New South Wales.