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 1.Climate change 2.Wildfires 3.Impacts and extinctions 4.Rivers and floods

3. Please click your second choice for next week 1.Climate change 2.Wildfires 3.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 Jan., 1983 March, 2006 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. oceanica.cofc.edu/.../ guide/process3.htm

19. In your group of 3-4 people, three things to do… A.Draw picture A of a shoreline with longshore drift (doesn’t matter which direction) B.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) C.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