The Pallinup rises 10 km southeast of Broomehill, and flows in a southeasterly direction toward the coast passing through Kybelup Pool and discharging into the Southern Ocean via Beaufort Inlet.
The local Noongar people also know the river as the Mara River and it is regarded as a place of historical importance as the Noongar have camped, fished and traded along the banks of the river for generations.
The Pallinup River is home to many native aquatic flora and fauna. Fish found in the Pallinup River include: Galaxias maculatus (spotted minnow), Leptatherina wallacei (western/Swan River hardyhead), Pseudogobius olorum ( Swan River goby), Gambusia holbrooki(Mosquito fish), Acanthopagrus butcheri (black bream). Gambusia is the only non-native species recorded in the Pallinup River.
Some aquatic plants sampled during the Department of Environment foreshore survey include the following: Cotula coronopifolia - which is a plant with small yellow button flowers. This species is found in areas which are frequently inundated, sometimes for long periods. It is an important plant for wading birds, particularly ducks and swans. Marsilea sp. (Nardoo) is another macrophyte found in waterways. It looks like a four leaf clover, but has a long single tap root, and floats on top of the water. It grows in seasonally flooded swamps and along creeks, and is very drought tolerant, dying away in arid conditions but growing back rapidly with rains. Aborigines used sporocarps of this plant for food (Nardoo). Juncaginaceae, Triglochin sp. - commonly known as 'water ribbons' were also found in the Pallinup River. These have tuberous roots that were used by Aborigines for food. The seeds germinate readily in the autumn in shallow water and the small plants survive the winter. This plant is very important for habitat for native fish and macroinvertebrates, and as food for wading birds. The plants will survive dry conditions by putting down underground rhizomes and tubers. They will only flower when they are flooded.
The water in the river is considered to be saline and explains why the river was also known as the Salt River with salinity levels varying from 3‰ when the river is flowing to over 50‰ in pools during summer.
The Pallinup has many tributaries including Warperup Creek, Six Mile Creek, Pendenup Creek, Peendebup Creek, Monjebup Creek and Corackerup Creek. No potable surface water sources are present in the Pallinup. The water quality ranges from brackish to saline. The best quality water streams exist in the Stirling Range National Park area of the catchment, which is the occasional source of snow-melt water.
Source Wikipedia Encylopedia