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We don't need s*&%. It's a bit of bloody water. So what if it covers an area the size of NSW. And well Toowoomba flash flood was a bit of a freak of nature, thats all. Stop trying to harp up and get sympathy from the rest of the world. Bloody Id!()7
Originally posted by ~Lucidity
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Originally posted by Yissachar1
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A dam and a prayer
The devastating flood has left whole families missing, now a mighty dam built to protect Brisbane after its last major flood disaster is at bursting point, reports David Humphries.
WITH the dead and missing in its wake, the worst flood in 100 years is building towards Brisbane as Australia's third-biggest city holds its breath and hopes a dam 80 kilometres to its west can keep back enough water to avoid a disaster of biblical proportions.
The Wivenhoe Dam - built to spare the Queensland capital a repeat of devastating floods in 1974 - is at its limit. ''And they now have to discharge that water [further swelling the Brisbane River] … because more is on the way,'' the lord mayor, Campbell Newman, said yesterday of the ''huge challenge'' facing Wivenhoe authorities.
Wivenhoe put to the ultimate test
Brisbane's main defence from a catastrophic flood is facing an unprecedented test as heavy rain continues to inundate southern Queensland.
Further upstream the Wivenhoe Dam, built in the wake of the deadly 1974 floods, is pumping record amounts of water over its spillway as the flood situation rapidly changes.
Last night releases from Wivenhoe's five gates were at about 236,000 megalitres, but that level will be increased today.
Professor Chanson says the dam operators have been progressively releasing water from the dam to prevent it filling.
"If the Wivenhoe become full up to the stage where the water in the reservoir is very close to the crest of the dam, it would mean a situation where the operators of the dam would have to open fully the gate of the spillway," he said.
"Anything coming into the reservoir would have to be immediately discharged."
He says it would be catastrophic if water made it over the top of the dam wall.
"The Wivenhoe Dam is not designed to be overtopped, it is what we call an embankment dam. And if water was to flow over the top of the crest of the dam, there would be a very high risk of erosion of the dam wall and ultimately failure of the dam," he said.
"If the water was to spill over the top of the crest of the dam we would look at the failure of the dam on the possible complete emptying of the reservoir into the Brisbane River with deadly consequences for the people living downstream."