The Arrowsmith River lies within the

Mid West The Mid West region is one of the nine regions of Western Australia. It is a sparsely populated region extending from the west coast of Western Australia, about north and south of its administrative centre of Geraldton and inland to east of W ...

region of

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

. The explorer

George Grey Sir George Grey, KCB (14 April 1812 – 19 September 1898) was a British soldier, explorer, colonial administrator and writer. He served in a succession of governing positions: Governor of South Australia, twice Governor of New Zealand, Gov ...

found the river on 11 April 1839, on his second expedition along the west coast. He named it after the distinguished English

cartographer Cartography (; from , 'papyrus, sheet of paper, map'; and , 'write') is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an imagined reality) can ...

John Arrowsmith. The river commences just south of

Arrino Arrino is a small town in the Mid West region of Western Australia. The town is located between Mingenew and Three Springs on the Midlands Road. The name of the town is Aboriginal in origin; it is the name of the local springs, thought to me ...

and north-west of Three Springs near the Midlands Road and flows in a westerly direction for a length of to the coast and terminates in Arrowsmith Lake, inland from Cliff Head. The river drops a total of in elevation over the course of its length.

Flood A flood is an overflow of water (list of non-water floods, or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant con ...

ing in surrounding areas occurred in 1932 following a torrential downpour that caused the river and surrounding creeks to rise and flood a few hours later. The

salinity Salinity () is the saltiness or amount of salt (chemistry), salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensio ...

levels in the river are often higher than 1000 mg/L due to

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

run-off water, but the potential bore yields of the catchment are quite high.

References

Rivers of the Mid West region {{WesternAustralia-river-stub