What happened in the 2011 Brisbane floods?
Flooding began to affect low-lying areas of Brisbane on the morning of 11 January 2011. By around 2:30 p.m. AEST, the Brisbane River broke its banks leading to evacuations in the Brisbane CBD and the suburbs of Fortitude Valley and West End.
What happened in the Queensland floods 2011?
On 13th January 2011 major flooding occurred throughout most of the Brisbane River catchment, most severely in Toowoomba and the Lockyer Creek catchment (where 23 people drowned), the Bremer River catchment and in Brisbane, the state capital of Queensland.
What was the main cause of the floods in early January 2011 in the Lockyer Valley QLD?
On 10 January 2011, a wall of water swept through Toowoomba, then travelled west, flooding Oakey, Dalby, Chinchilla and Condamine for a second time. This caused flooding through the Lockyer Valley, including Murphy’s Creek, Postman’s Ridge, Helidon, Grantham, Laidley, Lowood, Fernvale and Forrest Hill.
Where is Wivenhoe Dam released?
Wivenhoe Dam provides a safe drinking water supply for Brisbane, Ipswich, Logan, Gold Coast, Beaudesert, Esk, Gatton, Laidley, Kilcoy, Nanango and surrounding areas. Wivenhoe Dam was designed and built as a multifunctional facility.
What capacity was the Wivenhoe Dam in 2011?
1,165,238 ML
| Wivenhoe Dam | |
|---|---|
| Total capacity | 1,165,238 ML (256,317×106 imp gal; 307,823×106 US gal) |
| Catchment area | 7,020 km2 (2,710 sq mi) |
| Surface area | 109.4 km2 (42.2 sq mi) |
| Wivenhoe Power Station |
What happened at Wivenhoe Dam in 2011?
At Wivenhoe Dam, the operators transitioned from Strategy W1 to W3 at 8:00 am on January 8, 2011, as it became apparent that Wivenhoe pool levels would exceed El. 68.5 m.
Did Wivenhoe Dam cause the Lockyer Creek flood?
“It is clear that the dam release flood from Wivenhoe Dam was the immediate cause of flooding,” the report says. “Flood events in lower Lockyer Creek, in the lower Bremer River and in the lower Brisbane River were dwarfed by the subsequent water level rise associated with releases from Wivenhoe Dam [between January 11 and January 12]
How did Somerset Dam and Wivenhoe Dam operate during the 2011 flood?
During the January 2011 Flood Event, Somerset Dam and Wivenhoe Dam were operated in accordance with The Manual of Operational Procedures for Flood Mitigation at Wivenhoe Dam and Somerset Dam (Revision 7).
How much did it cost to build Wivenhoe Dam?
Construction of the auxiliary spillway for Wivenhoe Dam was completed in September 2005. This $70million project ensures that Wivenhoe Dam can withstand an extreme flood event. In the same report, SEQ Water states at page 30, under the heading “The Future”