Editing Levee (section)

=== Coastal flood prevention ===
Levees are very common on the marshlands bordering the [[Bay of Fundy]] in [[New Brunswick]] and [[Nova Scotia]], [[Canada]]. The [[Acadians]] who settled the area can be credited with the original construction of many of the levees in the area, created for the purpose of farming the fertile tidal marshlands. These levees are referred to as dykes. They are constructed with hinged sluice gates that open on the falling tide to drain freshwater from the agricultural marshlands and close on the rising tide to prevent seawater from entering behind the dyke. These sluice gates are called "[[aboiteau]]x". In the [[Lower Mainland]] around the city of [[Vancouver]], [[British Columbia]], there are levees (known locally as dikes, and also referred to as "the sea wall") to protect low-lying land in the [[Fraser River]] delta, particularly the city of [[Richmond, British Columbia|Richmond]] on [[Lulu Island]]. There are also dikes to protect other locations which have flooded in the past, such as the Pitt Polder, land adjacent to the [[Pitt River]], and other tributary rivers.

Coastal flood prevention levees are also common along the inland coastline behind the [[Wadden Sea]], an area devastated by many historic floods.<ref>{{cite web|url=http://www.waddensea-secretariat.org/sites/default/files/downloads/03.1-coastal-defence-10-05-14.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.waddensea-secretariat.org/sites/default/files/downloads/03.1-coastal-defence-10-05-14.pdf |archive-date=2022-10-09 |url-status=live|title=Trilateral Working Group on Coastal Protection and Sea Level Rise (CPSL), Wadden Sea Ecosystem No. 25 by Jacobus Hofstede, Common Wadden Sea Secretariat (CWSS), Wilhelmshaven, Germany, 2009|website=Waddensea-secretariat.org|access-date=3 April 2019}}</ref> Thus the peoples and governments have erected increasingly large and complex flood protection levee systems to stop the sea even during storm floods. The biggest of these are the huge levees in the [[Netherlands]], which have gone beyond just defending against floods, as they have aggressively taken back land that is below mean sea level.<ref>{{cite web|url=http://geography.about.com/od/specificplacesofinterest/a/dykes.htm|title=Dikes of the Netherlands&nbsp;— Geography|author=Matt Rosenberg|website=Geography.about.com|access-date=6 December 2014|archive-date=1 February 2009|archive-url=https://web.archive.org/web/20090201074700/http://geography.about.com/od/specificplacesofinterest/a/dykes.htm|url-status=dead}}</ref> <!-- {{Citation needed|date=June 2013}} Some source reference may be reused from the Netherlands article -->