Western Maritime Climate surge affected and exposed coastal estuarial river catchments tend to have highland headwater zones and high response to inland flood spate meeting steep energy wave and contracted basin backed sea outlets along the European and UK Atlantic fetch Oceanographic defined coastal continental slope and interim event sedimentation extensive platform The zones vary from low water deposition to high tide and flood ebb erosion and formation of granular beach and ridge with vegetal mass marsh drifting into the sludge as banks and pond lakes collapse at local scour