Shannon 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...

 located in the Great Southern

Great Southern

Great Southern can refer to any of the following:*Great Southern Television, based in Auckland and Sydney.*Great Southern , a region in Western Australia.*Great Southern , the backing band for American rock guitarist Dickey Betts....

 region 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 river rises in the forests to the West of Lake Muir and flows in a southerly 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...

 just East of Shannon then continuing South through the Shannon National Park

Shannon National Park

Shannon National Park is a national park on the south coast of Western Australia, south of Perth and southeast of Manjimup. It was declared a national park in 1988. The park covers the entire Shannon River basin....

 before entering the Broke Inlet

Broke Inlet

Broke Inlet is an inlet in the South West region of Western Australia located West of Walpole.The inlet is a large a shallow estuary found at the eastern end of the d'Entrecasteaux National Park, it is linked to the Southern Ocean by a narrow seasonally open channel situated between two high sand...

. The only tributary

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...

 of the river is Fish Creek.

The water quality

Water quality

Water quality is the physical, chemical and biological characteristics of water. It is a measure of the condition of water relative to the requirements of one or more biotic species and or to any human need or purpose. It is most frequently used by reference to a set of standards against which...

 of the river is excellent, fresh

Fresh

Fresh is a 1994 crime film written and directed by Boaz Yakin in his film directorial debut, and produced by Lawrence Bender , who at the time was riding the wave of success of Reservoir Dogs...

 and low in sediment

Sediment

Sediment is naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of fluids such as wind, water, or ice, and/or by the force of gravity acting on the particle itself....

s. Sandbanks bar the mouth of the river where in enters the inlet.