South Dandalup 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 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 at White Horse Hills North of Boddington

Boddington, Western Australia

Boddington is a town and shire in the Peel region of Western Australia, located south-east of Perth. The town sits on the road from Pinjarra to Williams on the Hotham River...

 and flows in westerly direction.

The river is nominally located at 32°35′S 115°53′E in the Shire of Murray

Shire of Murray

The Shire of Murray is a Local Government Area of Western Australia. It covers an area of just beyond metropolitan Perth, the capital of Western Australia. It lies about 80 km south of the Perth central business district. The Shire of Murray had a population of 11,969 as at the 2006...

, it flows throughLake Banksiadale

Lake Banksiadale

Lake Banksiadale is a freshwater lake in Western Australia. It is located at , about six kilometres north-east of Dwellingup in the locality of Banksiadale, Shire of Murray, in the Peel region...

 near Dwellingup

Dwellingup, Western Australia

Dwellingup is a town in Western Australia, located in a timber and fruitgrowing area in the Darling Range east-south-east of Pinjarra. At the 2006 census, Dwellingup had a population of 346.-Name:...

, crosses 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...

 north of Pinjarra

Pinjarra, Western Australia

Pinjarra is a town in the Peel region of Western Australia along the South Western Highway, from the state capital, Perth and south-east of the coastal city of Mandurah. Its local government area is the Shire of Murray. At the 2006 census, Pinjarra had a population of 3,279.Pinjarra is an area...

 to its confluence with the North Dandalup River east of Ravenswood

Ravenswood, Western Australia

Ravenswood in a small town in the Peel region of Western Australia.The town is located along Pinjarra Road and on the banks of the Murray River...

.

The two 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...

 of the South Dandalup River are Conjurunup Creek and Boomer Brook.

At Lake Banksiadale

Lake Banksiadale

Lake Banksiadale is a freshwater lake in Western Australia. It is located at , about six kilometres north-east of Dwellingup in the locality of Banksiadale, Shire of Murray, in the Peel region...

 the river is dam

Dam

A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

med by South Dandalup Dam

South Dandalup Dam

South Dandalup Dam is a dam in Western Australia. It is located at , where South Dandalup River flows out of Lake Banksiadale. The dam was built in 1971 in response to rapid population growth in Perth, Western Australia's capital city, and a resources boom in the Pilbara.With a reservoir capacity...

, the largest dam providing water to Perth

Perth, Western Australia

Perth is the capital and largest city of the Australian state of Western Australia and the fourth most populous city in Australia. The Perth metropolitan area has an estimated population of almost 1,700,000....

, Western Australia's capital city.