The
Vistula Delta were created as the result of river sediments accumulating
in a former gulf. The process of covering began about 6,000 years ago and
it is still going on. The natural environment of the Vistula River Delta
used to be composed of numerous river branches, lagoons, swamps, sandbanks
and shallows. Human has been present in this area for many ages and has
been acquiring land, e.g. for cultivation, since medieval times, and has
gradually transformed it into an artificial environment. This environment
is formed of polders, flood lands, hydro-technical buildings, etc. in a
plain area of about 2500 km2. |