A REPORT on the vanishing Portsea Beach has concluded sand erosion is a natural process and there is nothing to be done about it except to shore up the fast-eroding shoreline. Department of Sustainability and Environment contractors are set to return to the eroded beach to repair the eastern end of the 150-metre sandbag wall – again. DSE has released the Portsea Prefeasibility Study produced by international consultancy firm Aurecon and a sand monitoring report by GHD. The report considers erosion management options for the popular family beach and concludes maintenance of the sandbag wall is the best way to…