dutch windmill and bridge

activity barrage barrier below blue bridge climate clouds cloudy construct construction control current danger dangerous delta dikes dutch dykes ecological ecology energy environment europe flood floods furious greenenergy high holiday holland kats landscape leisure level low lowland marine natural nature netherlands oosterschelde peaceful prevention protect protection quiet relaxing rocks rocky sand sandy scenery scenic sea seadefence seasurface seawall seawater ship sky stones storm stormy sunny surface tidal tide touristic tranquil water watermanagement waterside wetlands wind windmill zealand