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The rest of the semester

The rest of the semester. Today: coastal hazards (apart from weather) F/M/W: stay tuned one moment Friday 27th: 4th exam, review Weds. 25th 5 PM, here M/W/F April 30/May 1/May 3: final group project on coastal hazards W May 9, 10 - 12, final exam. Please turn on your clicker.

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The rest of the semester

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  1. The rest of the semester • Today: coastal hazards (apart from weather) • F/M/W: stay tuned one moment • Friday 27th: 4th exam, review Weds. 25th 5 PM, here • M/W/F April 30/May 1/May 3: final group project on coastal hazards • W May 9, 10 - 12, final exam Please turn on your clicker

  2. Please click your first choice for next week • Climate change • Wildfires • Impacts and extinctions • Rivers and floods

  3. Please click your second choice for next week • Climate change • Wildfires • Impacts and extinctions

  4. TODAY: coastal hazards • READ • p. 226 - 232 (sure, read those pages again) • p. 243 - 246 (up to hurricanes) • p. 249 - 254 (“ “ “ ) • p. 260 - 261 (“Adjustment to coastal erosion”) • Be able to answer the Q’s on the handout

  5. In your group for ~10 minutes … • Read the article about coastal erosion • Anoint* a reporter, who will be prepared to discuss • what the article is about • what science the article explains well enough • what science the article infers you know something about/what terms are not explained well • what questions you have after reading the article *to install somebody officially or ceremonially in a position or office

  6. What is the article about? • Erosion of coastlines • Predictions over next 60 years • How to manage coastal erosion • Hazards and costs of damage

  7. What science is explained well enough? • How erosion occurs • How hurricanes affect erosion • How much erosion due to storms

  8. What science should you apparently know already/what terms aren’t explained? • What’s erosion? • Increased hurricane, but not why? • Sea level rising, but not why -- global warming? • What’s a hurricane

  9. Any other questions you have • How will erosion affect buildings -- ground or building itself • How to implement ideas to reduce threat of erosion? • What ideas are in circulation already? • What IS global warming? • Why spend so much money to move a lighthouse? Why not build another one?

  10. What is going on in coastal erosion? Why are 86,000 structures threatened along coastlines? • Wave energy: “the energy expended on a 400-km length of coastline with a height of 1 m is approximately equivalent to the energy produced by a nuclear power plant” • Whatever the height of the wave is (in meters), the energy is proportional to that amount squared

  11. Waves breaking on shore

  12. Wave refraction: waves break parallel to shore

  13. www.coastalchange.ucsd.edu/images/refraction2.jpg www.soton.ac.uk/ ~imw/harry.htm

  14. Longshore drift

  15. March, 1975 March, 2006 Jan., 1983 www.geol.ucsb.edu/faculty/sylvester/UCSBbeaches.html

  16. Jetties/groins/ breakwaters/ seawall to enhance beach development or protect harbors geology.uprm.edu/Morelock/GEOLOCN_/ coast/north/dorpho.jpg

  17. Jetties/groins/breakwaters/seawalls to enhance beach development

  18. Jetties/groins/breakwaters/seawalls to enhance beach development oceanica.cofc.edu/.../ guide/process3.htm

  19. In your group of 3-4 people, three things to do… • Draw picture A of a shoreline with longshore drift (doesn’t matter which direction) • You want to build a hotel on the beach, but you really don’t think there’s enough sand -- draw picture B of a likely resolution to that problem (including where your hotel will be) • Draw a picture C of the hotel on the next property “down-drift” and write a sentence about how the owner of that property might react

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