Delta Works was completed by the Europoortkering which required the construction of the Maeslantkering in the Nieuwe Waterweg between Maassluis and Hoek van Holland and the Hartelkering in the Hartel Canal near Spijkenisse. The works were declared finished after almost forty years in 1997. In reality the works were finished on 24 August 2010 with the official opening of the last strengthened and raised retaining wall near the city of Harlingen, Netherlands. Due to climate change and relative sea-level rise, the dikes will eventually have to be made higher and wider. This is a long term uphill battle against the sea. The
Coastline of the North Sea similar action to that which created the fjords and firths. The glaciers in these places affected the land to an even greater extent, so that large areas were scraped away. The coastal brim ("Strandflaten"), which is found especially in southern Norway, is a gently sloping lowland area between the sea and the mountains. It consists of plates of rock platforms, and often extends for kilometres, reaching under the sea, at a depth of only a few metres. The shallow-water coasts of the southern and eastern coast up to Denmark were formed by ice age activity, but their particular shape is