Implications for Coastal Management

The consequences of inundation west of the caravan park are likely to be low, so management planning here would likely be a lower priority, even though impacted by inundation under present day conditions. It is also likely that the financial costs of protecting the Sands Caravan Park area from inundation will not be affordable; therefore retreat options may be preferred in this area. This will be further investigated in subsequent risk and mitigation studies.

Management triggers are presented in Error! Reference source not found..

Table 6-16     Management triggers – Clifton Springs Coast

Hazard Mechanism Estimated scenario under which this is likely to occur Triggers
Inundation (Sands Caravan Park) Overwashing of the shoreline due to storm-tide inundation + sea-level rise 1% AEP event + 0.0 m SLR A) Investigation and planning / management required at present day levels. The consequences of this are likely to be low, so could be a low-priority, even though impacted by inundation under present day conditions.

 

The previous geotechnical assessments consider the slope stability hazards along this shoreline (A.S. Miner Geotechnical, 2011). The report findings noted that the reduction of the beach width at the toe of the cliffs over the past 60 years had little effect on the stability of the cliffs behind, however this will change as the erosion regresses into the slopes over time. This will be exacerbated by sea-level rise. The Miner report addresses the slope hazards and risk for the present day; however, it does not consider future erosion scenarios. This should be taken into account in subsequent risk assessments, which should be undertaken in consultation with geotechnical engineers.

Inundation Hazard Assessment

Further investigations & recommendations