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.
Eastern Scheldt The Eastern Scheldt (Dutch: "Oosterschelde" ) is a former estuary in the province of Zeeland, Netherlands, between Schouwen-Duiveland and Tholen on the north and Noord-Beveland and Zuid-Beveland on the south. It is also the largest national park in the Netherlands, founded in 2002.