Study rates this week’s unprecedented monsoonal rainfall as comparable to a one in 1,000-year flood

Australian authorities must plan for more severe floods, experts have warned, amid concern that the management of the Townsville Ross River dam contributed to extensive flooding when a massive amount of water was released downstream.

The decision to open the floodgates when the dam water level reached 43m was based on a 2012 study that warned doing so could cause more extensive property damage during the most extreme flooding events.

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Read More Townsville floods: dam management under scrutiny as experts demand greater preparation

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