Gudgenby River

The Gudgenby River, a perennial river that is part of the Murrumbidgee catchment within the Murray-Darling basin, is located in the Australian Capital Territory, Australia.

Gudgenby
Location of the Gudgenby River mouth in the ACT
Location
CountryAustralia
TerritoryAustralian Capital Territory
RegionSouth Eastern Highlands (IBRA), Capital Country
Physical characteristics
SourceMount Gudgenby and Yankee Hat, Brindabella Range
Source confluenceBogong Creek and Middle Creek (Australian Capital Territory)
 • locationNamadgi National Park
 • coordinates35°46′17″S 148°56′31″E
 • elevation995 m (3,264 ft)
Mouthconfluence with the Murrumbidgee River
 • location
near Tharwa
 • coordinates
35°31′14″S 149°4′33″E
 • elevation
573 m (1,880 ft)
Length35 km (22 mi)
Basin features
River systemMurrumbidgee River,
Murray–Darling basin
Tributaries 
 • leftNursery Creek, Orroral River, Booroomba Creek, Naas River
 • rightHospital Creek (ACT), Dry Creek (ACT), Half Moon Creek
[1]

Location and features

Formed by the confluence of Bogong Creek and Middle Creek, the Gudgenby River rises within Namadgi National Park, below Yankee Hat and Mount Gudgenby, on the south-eastern slopes of the Brindabella Range in the south of the Australian Capital Territory (ACT). The river flows generally north and north-east, joined by nine tributaries, including the Naas River and Orroral River, before reaching its confluence with the Murrumbidgee River, near Tharwa. The river descends 422 metres (1,385 ft) over its 35 kilometres (22 mi) course.[1]

The river catchment contains ecologically significant alpine wetlands.

In 2004, ACTEW announced that the creation of a large 159 gigalitres (5.6×109 cu ft) reservoir by damming the Gudgenby River, below Mount Tennent, was one of three options being considered as part of the Future Water Options Project in order to provide improved reliability and increased supply of potable water for Canberra and the ACT. By 2005, the ACT Government decided that the creation of the Mount Tennent dam would not proceed; in favour enlarging the Cotter Dam.[2]

Climate

Gudgenby River, due to its much higher elevation, yields a noticeably cooler climate than that of Canberra. Gudgenby River is precisely where the record low of –14.6 °C for the Australian Capital Territory was held.

Climate data for Gudgenby River, ACT (Murrumbidgee Catchment); 975 m AMSL; 35° 45′ 00.00″ S
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 39.0
(102.2)		 37.8
(100.0)		 33.5
(92.3)		 31.0
(87.8)		 22.3
(72.1)		 16.3
(61.3)		 16.5
(61.7)		 21.5
(70.7)		 25.8
(78.4)		 28.5
(83.3)		 32.0
(89.6)		 35.0
(95.0)		 39.0
(102.2)
Average high °C (°F) 25.7
(78.3)		 25.4
(77.7)		 22.1
(71.8)		 17.9
(64.2)		 13.1
(55.6)		 10.1
(50.2)		 9.3
(48.7)		 10.9
(51.6)		 13.8
(56.8)		 17.4
(63.3)		 20.0
(68.0)		 23.7
(74.7)		 17.5
(63.4)
Average low °C (°F) 9.3
(48.7)		 9.4
(48.9)		 6.6
(43.9)		 2.5
(36.5)		 0.1
(32.2)		 −2.3
(27.9)		 −3.0
(26.6)		 −1.8
(28.8)		 0.0
(32.0)		 3.2
(37.8)		 5.0
(41.0)		 7.1
(44.8)		 3.0
(37.4)
Record low °C (°F) −2.5
(27.5)		 −2.2
(28.0)		 −4.8
(23.4)		 −8.2
(17.2)		 −11.0
(12.2)		 −12.0
(10.4)		 −14.6
(5.7)		 −10.8
(12.6)		 −9.3
(15.3)		 −7.0
(19.4)		 −5.2
(22.6)		 −1.5
(29.3)		 −14.6
(5.7)
Average precipitation mm (inches) 75.2
(2.96)		 57.9
(2.28)		 65.4
(2.57)		 55.7
(2.19)		 55.6
(2.19)		 69.3
(2.73)		 58.2
(2.29)		 57.9
(2.28)		 69.7
(2.74)		 74.8
(2.94)		 63.7
(2.51)		 63.9
(2.52)		 767.3
(30.2)
Average precipitation days 6.9 6.2 7.0 6.5 7.1 8.5 8.4 9.2 9.2 9.4 8.1 7.6 94.1
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See also

References
  1. "Map of Gudgenby Creek, ACT". Bonzle.com. Retrieved 14 February 2013.
  2. "Proposal for the pass-through of water supply augmentation costs" (PDF). Submission to the Independent Competition and Regulatory Commission. ACTEW Corporation. 13 January 2006. pp. 1, 8. Archived from the original (PDF) on 11 April 2013. Retrieved 15 February 2013.


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