Researchers have discovered that Brisbane is not ready to handle floods as the deep holes of Moreton Bay won’t allow them to do so.
When it rains heavily, the deep holes in the bay are filled with water, thereby not letting the water logged in the city to drain. As of now, Brisbane has a perfect-looking beach that is 25-meters deep. Its cleanliness provides a perfect backdrop to the inner-city beach that comprises white sand which is visible as the Brisbane River proceeds towards achieving its cleanest point every year since 2013.
However, an expert has stated that the perfect appearance of the river will not last forever and would fade very soon. Australian Institute’s director and Griffith University’s water science professor Jon Olley said that the condition of the Brisbane River is deteriorating, and the reason behind it is the continuous rain. “We haven’t had significant rain for a while now and whenever we don’t have rain in the catchments, the river cleans up quite a bit,” he said.
The professor said that the amount of sediment and mud that get logged in the river was washed downstream from the Upper Brisbane River and the Lockyer Valley catchments during the flood that took place in 2011 as well as in 2013. The mud and sediment ran directly into Moreton Bay with reportedly deep holes. The areas that were filled with mud during the floods look perfectly fine and clean now but at the time of the calamity, they were muddy all over.
Moreton Bay, however, has been found to have deep holes that seem to be filling gradually with the wash aways. This, according to Olley, is giving rise to future difficulties. “It has cleaned itself up well since the floods, but the sad part of the story is that all of the deep holes in Moreton Bay that were taking the fine sediment are now largely full,” Brisbane Times quoted him as saying.
“Future floods will have a much larger impact on the (Moreton) Bay system,” he added.