Tackling erosion along the beaches
STATE Government co-ordination could be needed in the fight against coastal erosion threatening several sections of the metropolitan coast from Fremantle north.
The six councils responsible for about 25km of coastline face getting less sand and more damage to their beaches and infrastructure in coming years from a triple-whammy of sea rise, storms and changes to natural sand flow caused by groynes and moles.
There is also a pending cycle of super tides expected to hit Perth about 2031.
State Government policy recommends councils plan for a 0.9m sea rise in the next 100 years and Port Beach has been declared WA’s top erosion hot spot among 55 others being monitored in the State.
In a bid to assist some of the problems along the coast, where seabreezepowered longshore drift can move sand south to north in local zones called cells, annual anti-erosion grants of about $3.4 million were awarded by the State Government to the councils last month. Projects ranged from Stirling and Fremantle councils studying the erosion threats to their beaches to Cottesloe restoring a small section of its dunes.
Fremantle got the lion’s share of $3.25m to dump protective sand for 10 years on its heavily damaged Port Beach after it was hit by another storm in May.
The port city’s long-term strategy is to retreat from the encroaching waves while investigating more groynes or seawalls in a report due this November.
It also shares $18,750 with neighbouring
Erosion damage at Fremantle's ' P Port t Beach this year.
Mosman Park for a continuing study into sand movement along their shared Port, Leighton and Mosman Park beaches.
A Nedlands council spokeswoman said it would be “interested” in co-ordinated anti-erosion work from Fremantle to Stirling if it was based on a “sound” scientific understand about what was affecting the coast.
Asked if a co-ordinating body would be set up, a Department of Planning, Lands and Heritage spokeswoman said there was no “one size fits all’ approach to coastal erosion because damage was specific to locations, the environment at each spot and planning in those areas.
The spokeswoman said the Government worked with councils on coastal hazards to create overall policies.
Cottesloe deputy mayor Lorraine Young with Cott Coast Care chairman Mike Ewing getting on with dune repairs.
Storm surge waves reache reached under the Indiana restaurant in Cottesloe.