|Length||85 kilometres (53 mi) |
|Source elevation||250 metres (820 ft) |
|Avg. discharge||5212 ML/yr |
|Basin area||1,833 square kilometres (708 sq mi)|
The first European to discover the river was the explorer George Grey on 11 April 1839, on his second disastrous expedition along the west coast. He named it after the distinguished English cartographer John Arrowsmith.
The river commences just south of Arrino and north-west of Three Springs near the Midlands Road and flows in a westerly direction for a length of 85 kilometres (53 mi) to the coast and terminates in Arrowsmith Lake, 9 kilometres (6 mi) inland from Cliff Head.
The river drops a total of 219 metres (719 ft) in elevation over the course of its length.
- Western Australian Land Information Authority. "History of river names". Retrieved 11 October 2008.
- "Bonzle Digital Atlas - Arrowsmith River". 2006. Retrieved 11 October 2008.
- "WA Department of Water - Water Resources Data - Streamflow Sites - Arrowsmith River - Robb Crossing". 2008. Retrieved 11 October 2008.
- "West Midlands Hydrology Project". 2003. Retrieved 12 October 2010.
- Grey, George (1841). Journals of two expeditions of discovery in North-West and Western Australia, during the years 1837, 38, and 39, describing many newly discovered, important, and fertile districts, with observations on the moral and physical condition of the aboriginal inhabitants, etc. etc. 2. London: T. and W. Boone. p. 56. Retrieved 17 March 2012.
- "Anxiety in the Country". The West Australian (Perth, Western Australia: National Library of Australia). 19 July 1932. p. 10. Retrieved 31 March 2013.
- "Australian Natural Resources Atlas". 2007. Retrieved 11 October 2008.
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