Nogoa | |
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![]() Railway bridge inEmerald during a flood, 1918 | |
Location of Nogoa Rivermouth in Queensland | |
Location | |
Country | Australia |
State | Queensland |
Region | Central Queensland |
City | Emerald |
Physical characteristics | |
Source | Carnarvon Range |
• location | Carnarvon National Park |
• coordinates | 24°51′38″S147°00′16″E / 24.86056°S 147.00444°E /-24.86056; 147.00444 |
• elevation | 501 m (1,644 ft) |
Mouth | confluence withComet River, forming theMackenzie River |
• location | north ofComet |
• coordinates | 23°33′21″S148°32′11″E / 23.55583°S 148.53639°E /-23.55583; 148.53639 |
• elevation | 144 m (472 ft) |
Length | 569 km (354 mi) |
Basin size | 27,690 km2 (10,690 sq mi)[1] |
Basin features | |
River system | Fitzroy River basin |
National parks | Carnarvon National Park,Minerva Hills National Park,Peak Range National Park,Snake Range National Park |
[2] |
TheNogoa River is ariver inCentral Queensland, Australia.
The river rises on theCarnarvon Range, part of theGreat Dividing Range, in theCarnarvon National Park and flows in a generally north easterly direction towardsEmerald. From source tomouth, the Nogoa River is joined by 29 minortributaries. North ofComet the river formsconfluence with theComet River to form theMackenzie River. The Nogoa descends 361 metres (1,184 ft) over its 569-kilometre (354 mi)course. The river is crossed by theGregory andCapricorn Highways at Emerald.[2]
The river has acatchment area of 27,690 square kilometres (10,690 sq mi) draining parts of theMinerva Hills,Peak Range,Snake Rangenational parks. Of this area, 271 kilometres (168 mi) isriverinewetlands.[1]
Thereservoir created by Queensland's second largest dam,[3] Lake Maraboon was formed when theFairbairn Dam was built on the river in 1972. The dam and a network ofchannels along the Nogoa River supplies water for the Emerald Irrigation Area.[4]
Sir Thomas Mitchell was the first European explorer to discover the river on 19 July 1846.[5]
In January 2008, the Nogoa River reached record flood levels. During the flood, water levels in the Fairbairn Dam rapidly exceeded 100%.[6] Within a week inundations had caused severe disruptions to graziers, crops growers and to residents of Emerald when waters broke its banks. The Nogoa peaked at 15.4 m (51 ft) in Emerald on the night of January 22 2008, causing more than 2500 people to be evacuated.[7] The unprecedented floods washed through theEnsham coal mine, temporarily halting operations in two out of six coal pits, reducing output to less than 50% and rendering a hugedragline defunct after it had been submerged.[8]
InDecember 2010 - January 2011 the river was impacted by major flooding at Emerald[9] and in the Nogoa's upper catchment.[10]
Thetraditional owners include theGayiri people who occupied the area for tens of thousands of years before European colonisation began in the nineteenth century. The Gayiri (Kairi, Khararya) language region takes in the landscape of the Central Highlands Regional Council, includingEmerald and Nogoa River.[11]