In the last 600 years, the polders of the Biesbosch were developed through sand accretion and land acclamation of a big lake. But the discharge of the rivers increased and the sea level rose. To create more space for the river, openings were made in the dikes in order to let the river flow over the land.
More info: www.ruimtevoorderivier.nl
Produced by: www.rombus.nl
Language: English subtitles, Dutch
Region: The Netherlands