Behind the sea wall , the marshes were drained after the war , and reverted to farmland , but the bank was breached in the North Sea flood of 1953 , returning the whole area to tidal saltmarsh dominated by sea aster . The construction of a new sea wall across the reserve created a shallow freshwater lagoon , with a reed bed on its northern side and a vegetation-free brackish marsh
North Sea flood of 1953
North Sea flood of 1953
Titchwell Marsh