top angle of a small boat leaving the lanaye lock with the floodgate open

albert angle architecture barge barrage barrier belgium boat bridge building canal cargo cloudy dam day dike dyke engineering environment europe floodgate freight freighter gate gateway harbor huge hydraulic hydro industrial lanaye landscape leaving levees level lock low nature nautical navigation open port red reservoir river ship shipping sluice small stream summer ternaaien top transport transportation travel vessel wall walls water watercourse watergate waterway weir