Warren River (Western Australia)
Encyclopedia
The Warren River is a river
River
A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in the South West of Western Australia
Western Australia
Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...

.

The headwaters of the river rise in the Tone State Forest just West of Strachan then flow in a south westerly direction crossing the South Western Highway
South Western Highway
South Western Highway is a highway in the South West region of Western Australia connecting Perth's southeast with Walpole. It is a part of the National Highway 1 network for most of its length...

 and then flowing through the Warren State Forest, finally discharging into the Southern Ocean
Southern Ocean
The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...

 near Coolyarbup.

The river has eight tributaries
Tributary
A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 including; Wilgarup River, Perup River, Tone River
Tone River (Western Australia)
The Tone River is a river in the South West of Western Australia.The headwaters of the river rise South West of Kojonup and flow in a south westerly direction crossing Muirs Highway and through Strachan then discharging into the Warren River in Lake Muir Nature Reserve.The river has four...

, LeFroy Brook, Diamond Tree Gully and Dombakup Brook.

The average salinity of the river water up to 2001 has been 895 mg/L and rising, with some 67% coming from the Perup and Tone river catchments which only contribute 19% to the total flow. To combat the rise in salinity a large tree planting program has been recommended for the catchment area.
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