The river arises from a catchment of just 40 square kilometres in the Whicher Range.[1][2][3][4]
The middle reaches pass through land cleared for agriculture, especially viticulture.
There is a weir across the river just above the town. The mouth of the river is a small estuary, closed to the ocean by a sandbar that opens only seasonally.
Margaret River is presumed to be named after Margaret Wyche, cousin of John Garrett Bussell (founder of Busselton) in 1832.
Western Australia. Margaret River Catchment Management Plan Working Group; Water Authority of Western Australia (1993), Margaret River and Ten Mile Brook catchment management plan 1993-1998, Water Authority of Western Australia, ISBN978-0-7309-5263-3
Hanran-Smith, Genevieve; Milton, Kristin; Western Australia. Water and Rivers Commission; Natural Heritage Trust (Australia); Geographe Catchment Council; Cape to Cape Catchments Group; Cape to Cape Catchments Group (W.A.) (2003), Margaret River action plan: 2003, Water and Rivers Commission, ISBN978-1-920687-40-3
Western Australia. Dept. of Environment; Western Australia. Dept. of Environment. Water Resources Division; Western Australia. Dept. of Environment. Water Resources Division (2005), Margaret River Catchment Area (including Ten Mile Brook Catchment) drinking water source protection plan: Margaret River, Prevelly, Gnarabup and Cowaramup town water supply, Dept. of Environment, ISBN978-0-7309-7544-1
References
Brearley, Anne (2005). Ernest Hodgkin's Swanland: Estuaries and coastal lagoons of Southwestern Australia. University of Western Australia Press. ISBN1-920694-38-2.
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