beach pole with red top marking tide line, netherlands

basic coastline beach beacon coast coastal distance marker dutch ebb europe european gauge goeree goereeoverflakkee holland horizon indicator kwade hoek landscape locality mark low tide maasvlakte measurement measuring monitor mudflat mudflats nature reserve netherlands north sea northsea pole post puddle sand sandflat seaside shore shoreline slijkgat south stellendam sunny tidal flats line tideland water level weathered wetland wetlands wooden