Reports

Historical foredune and beach profile data for the Victor Harbor to Kingston region collected by the Department of Environment and Water, together with LiDAR datasets from 2008 and 2018, were analysed to assess the magnitude of topographic change and to investigate potential shoreline responses to sea level rise. The analysis shows that beach–dune systems in the region exhibit high spatial and temporal variability, with profiles indicating accretion, erosion, or relative stability depending on location. While a small number of sites, such as Victor Harbor and Cape Jaffa, show persistent erosional behaviour and very few (e.g. Goolwa) display accretion, no consistent long-term erosion trend attributable to sea level rise is evident over more than 40 years of observations. Instead, short- to medium-term fluctuations driven by storm-induced erosion and subsequent accretion during calmer wave conditions appear to dominate the record, masking any potential sea level rise signal.