CSIRO has reported the completion of powerful modelling techniques to aim to better understand the full impact of flooding that occurs when dams collapse.

 

The research has been helping China’s disaster management authorities better understand the full impact of the catastrophic flooding that would occur if one of China’s biggest dams collapsed.

 

Working with China’s Satellite Surveying & Mapping Application Centre (SASMAC), CSIRO scientists have modelled the effects of a catastrophic failure of the massive Geheyan Dam in China’s Hubei province. They have simulated the impact of flooding on the surrounding region and its infrastructure if the dam suddenly released its 3.12 billion cubic metres of water.

 

The Geheyan Dam holds more than five times the volume of water in Sydney Harbour. Dam failure is of particular concern in China because many of the country’s 70,000 dams are in regions prone to earthquakes.

 

“We modelled six different dam failure scenarios,” said CSIRO computational scientist, Dr Mahesh Prakash.

 

“Our simulations show where the water would go, how fast it would reach important infrastructure such as power stations and the extent of inundation in major townships downstream.”

 

The team at CSIRO used the same technique and software to model other catastrophic geophysical flow events like tsunamis, floods, storm surges as well as landslides and volcanoes. The technique was tested by modelling the 1928 St Francis dam break in California.