How much of the Netherlands is affected by the problem regulated by the Hoogheemraadschap van Rijnland?
Flood control in the Netherlands Flood control is an important issue for the Netherlands, as about two thirds of its area is vulnerable to flooding, while the country is among the most densely populated on Earth. Natural sand dunes and constructed dikes, dams, and floodgates provide defense against storm surges from the sea. River dikes prevent flooding from water flowing into the country by the major rivers Rhine and Meuse, while a complicated system of drainage ditches, canals, and pumping stations (historically: windmills) keep the low-lying parts dry for habitation and agriculture. Water control boards are the independent local government bodies responsible for maintaining this system.
Bergschenhoek Bergschenhoek (] ) is a town and former municipality in the Netherlands. It is situated roughly 10 km to the north of Rotterdam in the province of South Holland. The former municipality had a population of 17,075 in 2006, and covered an area of 15.52 km² (5.99 mile²) of which 0.63 km² (0.24 mile²) is water. On 1 January 2007, the town was merged with neighbouring towns Berkel en Rodenrijs and Bleiswijk to form the new municipality Lansingerland; these three towns collectively are known locally as the "3B Hoek".