flood bed and riverbank
river and stream
stabilized dune
after 1943
mixed
detached longitudinal defence
submerged wet land
urban area
farmland
wet land
arboreal vegetation
abandoned meander
levee
after 1900 - before 1943
arboreal
fluvial bar
adherent longitudinal defence
sea storm terrace
mixed defence
beach ridge
beach with infrastructure
flattened dune
shrub
cross-shore defence
low tide terrace
before 1900
semi-stabilized dune
runoff channel
dry beach
active dune
flooded beach
washover fan
mouth bar
reworked soli
urban green