storms often cause water of tide for s' to crush on the dams and to flood the rivers and the estuaries. Although all the coastal areas are threatened, two particularly vulnerable factors are l' important entry of the tides known in the past like Zuiderzee and the delta created by the Rhine and the Meuse in the south-western corner of the country. Netherlander engineers purse to propose that Zuiderzee being dammed up and drained at the 19th century, but the government was reticent with s' to attack with an immense project. Then, in 1916, a furious storm struck the provinces of north. The difficulties of the agricultural production in time of war worsened, and it way was traced for the construction of stoppings on Zuiderzee...