The Mystery of the Disappearing Sand

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Presentation transcript:

The Mystery of the Disappearing Sand Angela Taylor

Beach Erosion The wearing away of rock, soil, and other biotic and abiotic earth materials.

What are some of the causes? Wind Waves Currents: Deep ocean currents, long shore currents. near shore currents Dredging Tourism – shoreline recreation Use this slide to help students brainstorm as you present.

Predicting shoreline change Decipher how waves evolve Determine where currents will form and why Learn where sand comes from and where it goes Understand when conditions are right to promote beach erosion, transport, or deposition. http://www.whoi.edu/oceanus/viewVideo.do?fileid=2 364&id=2400

What tools do scientists use? http://www.carocoops.org/carocoops_website/buoypic s.htm High-frequency radar (insert page 10 from Harvey here) Lets explore some data sets http://nautilus.baruch.sc.edu/carocoops_website/buo y_detail.php?buoy=buoy2 The teacher may need to describe what high-frequency radar is.

What is the real solution? The Army Corps function is to reduce storm damage. The Fish and Wildlife Conservation Commission protects the habitat of sea turtles. The state Department of Environmental Protection ensures that any "solution" put into place doesn't create problems elsewhere.

Beach Replenishment Scientists use data to know when and where to get the sand from Here is an example of a citizen helping to solve a problem where perhaps data was not used to determine where the sand should come from. http://ianswales.com/en/article/2011/508025/redcar- resident-solves-mystery-of-disappearing-sands

Key Vocabulary Jetty Groin Storm surge Long shore current

Resources http://news.nationalgeographic.com/news/2004/11/1 130_041130_florida_hurricanes_2004.html http://www.friendsofhuntingisland.org/beaches.html http://www.dnr.sc.gov/climate/sco/ClimateData/yearl y/cli_sc2008review.php http://www.whoi.edu/oceanus/viewArticle.do?id=247 0 http://www.snookfoundation.org/news/research/125- a-coastal-engineer-answers.html http://www.meteorologynews.com/2011/09/05/hurri cane-irene-before-and-after-photos/