Hamersley River Explained

Hamersley River
Mouth Location:Hamersley Inlet
Subdivision Type1:Country
Subdivision Name1:Australia
Length:40km (30miles)
Source1 Elevation:252m (827feet)[1]
Mouth Elevation:sea level

The Hamersley River is an ephemeral river in the Great Southern region of Western Australia.

The headwaters of the river rise east of Fitzgerald and just north of the South Coast Highway on an undulating sandplain on the edge of the Yilgarn plateau and flows in a south easterly direction. The river flows through the Fitzgerald River National Park winding through gorges cut into faults in the quartzite and schist of the Mount Barren formation until discharging into the Hamersley Inlet and on to the Southern Ocean.

Hamersley Inlet is a wave dominated estuary approximately 7km (04miles) in length with a depth of about 2m (07feet)[2] with a total surface area of 2.9km2.[3]

The river was named by the explorer and surveyor John Forrest in 1871 while on expedition in the area. He is thought to have named it after his future wife, Margaret Hamersley or her family.

The river is an important drainage network in the National Park. The river flows very little under normal conditions but floods infrequently after heavy rain events.

The upper part of the catchment has been mostly cleared for agriculture but the lower part in the National park is in near pristine condition. Overall 20% of the river's catchment has been cleared.[4]

References

-33.9481°N 119.92°W

Notes and References

  1. Web site: Bonzle Digital Atlas – Map of Hamersley River. 2009. 12 July 2016.
  2. Web site: South Coast Rivercare - Hamersley Inlet. 2002. 15 October 2010.
  3. Web site: Estuary Assessment Framework for Non-Pristine Estuaries - Estuary 888 - Hamersley Inlet. 2006. 25 April 2009. dead. https://web.archive.org/web/20090523085037/http://dbforms.ga.gov.au/pls/www/npm.ozest.show_mm?pBlobno=9444. 23 May 2009. dmy-all.
  4. Web site: South coast Rivercare - Hamersley River. 2002. 24 April 2009.