When 100 percent is half-full

Many people, including me have struggled with the percentages used by authorities to explain the amount of water held by Wivenhoe dam.
For example, during the Brisbane flood event it was said that the dam was 186% full. Now there's a head-scratching number. How can a dam be more than 100% full?
It appears that the full capacity of the dam is 225% - with 100% referring to the storage of the region's drinking water and anything above that is for flood storage.
Still don't understand? Check out an article published yesterday by the Australian Geographic. Simply click on this article's headline.
One thing the article doesn't touch on is the legislation that requires seqwater to drain the floodwaters stored - 'within the required 7 days'.
Now what's that all about?
The economic cost of the Queensland floods is expected to be the highest in Australia's history. The federal government has already paid out $52m in immediate support to victims. The Premier's flood appeal has raised $85 million, and Ms Bligh has promised all the money will go directly to victims.
The river level at Colleges Crossing is still at catastrophic heights, and it should be remembered that the level at Mt Crosby at the peak of the flood was 26m. Colleges Crossing has been hit by a series of floods over the last couple of months as a result of those dam releases of stored floodwaters to comply with the 'required 7 days' in the legislation.
As everyone is aware the cafe at Colleges Crossing was removed last Monday as the flood levels got to critical levels.

Well since then I've be able to dig up a copy of the Local Bulletin news magazine from 1996 which featured the May floods of that year during which the cafe was also moved to the top of the hill overlooking the park.
The estimated cost for the repairs nearly 15 years ago was $150,000. The figure this year will leave that in the shade.

These latest releases from Wivenhoe dam are continuing around 300,000 megalitres a day, and Colleges Crossing is expected to remain inundated until the middle of next week.
It won't be a pretty sight when the water finally subsides.
It may been long time before the cafe reopens.