The rest of the semester

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 Qs 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 arent explained?

• Whats erosion?
• Increased hurricane, but not why?
• Sea level rising, but not why -- global warming?
• Whats 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
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Longshore drift
15
March, 1975
March, 2006
Jan., 1983
www.geol.ucsb.edu/faculty/sylvester/UCSBbeaches.ht
ml
16
Jetties/groins/ breakwaters/ seawall to enhance
beach development or protect harbors
geology.uprm.edu/Morelock/GEOLOCN_/ coast/north/do
rpho.jpg
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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

1. Draw picture A of a shoreline with longshore
   drift (doesnt matter which direction)
2. You want to build a hotel on the beach, but you
   really dont think theres enough sand -- draw
   picture B of a likely resolution to that problem
   (including where your hotel will be)
3. 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