How much of the Netherlands is affected by the problem regulated by the Hoogheemraadschap van Rijnland?
Hoogheemraadschap van Rijnland The Hoogheemraadschap van Rijnland is the oldest water board of the Netherlands, having received its first commission to protect the land from flooding back in 1248 from William II of Holland. It conducts water control activities in the general area known as Rijnland. The Netherlands has 27 Waterboards or "Waterschappen" acting independently from the National government administration to manage the continuing Dutch struggle against water.
Nieuwveen Nieuwveen is a town in the Dutch province of South Holland, located close to the border of province North Holland, about 35 kilometers (22 miles) southwest of the city of Amsterdam. It is a part of the municipality of Nieuwkoop (until 2007: Liemeer), and lies about 9 kilometers (6 miles) northeast of Alphen aan den Rijn.