Definition: A Seawall (also written as sea wall) is a form of hard and strong Costal Defense constructed on the inland part of a Coast to reduce the effects of strong waves.

Materials: most commonly, reinforced concrete, boulders, steel, or gabions. Additional seawall construction materials may include vinyl, wood, aluminium, fibreglass composite and with large biodegrable sandbags made of jute and coir.



Pictures:
sea_wall.jpg

Sources:
http://en.wikipedia.org/wiki/Seawall
http://www.townofstratford.com/images/Seawall.JPG


"Coastal erosion and the ban on hard structures - North Carolina Digital History." LEARN NC. N.p., n.d. Web. 9 Apr. 2010. <http://www.learnnc.org/lp/editions/nchist-recent/6374>.