Noosa David Heckendorf rejects Munna Point erosion claims
NOOSA'S Dog Beach restoration activist is not convinced the stabilisation works on the recreational spot on Noosa Spit is an erosion threat to Munna Point.
David Heckendorf, who petitioned council for action to bring back the beach inside the river mouth, said he shares public concerns about the loss of beach and palm trees at the Noosa River Holiday Park. But he also supports the Sunshine Coast Council's experts who assessed that there would be negligible upstream impacts.
"River bank erosion in the Munna Point stretch of the river has been occurring for a long time, I don't believe it is caused by works associated with the restoration of Dog Beach," Mr Heckendorf said.
"Munna Point and for a couple of hundred metres upstream is just another stress point along the river as the stream moves with different weather conditions. That is why this stretch has a rock wall to protect the bank and buildings at the end of Russell St."
Mr Heckendorf said ongoing erosion for 200m upstream of Munna Point had seen dock piles collapse near the Queensland Fisheries building while a wooden dock further upstream has been removed recently.
"The river is quite deep along this stretch, I guess the bank is being held by the rock wall put in years ago. It runs parallel to the stream, and is probably in danger of being undercut," he said.
Mr Heckendorf believes the solution for stabilising this section would be a rock groyne from the end of Russell St to divert the river stream away from the bank, allowing the bank to naturally re-establish.
"This rock groyne need not be visible above the water as it is the underwater structure that creates the required effect with the current," he said.
He said such "spur groynes" to protect river banks are common throughout the world.
Mr Heckendorf is a former owner of a precast concrete business and is developing his own concrete "fish habitat module" which could be used in place of quarry rock.