1. X. The Coast: Beaches and Shoreline Processes (Chapter 10)by
Al Trujillo

2. Hard Stabilization: Jetties, Groins, and Breakwaters
Jetties: Always in pairs; built to protect a harbor entrance
Groins: Individual or many (if many = “groin field”); built to trap sand

3. Ex: Groin A groin has nothing to do with human anatomy…
Why is a groin built?
So that the beach is wide in front of your house!
Your house
Neighbor’s house
New groin

4. Curved breakwater, Greece
Ex: Breakwater
A hard, rocky structure built parallel to shore and attached to the sea floor
A few feet above sea level
Designed to break waves and make quiet water behind
Curved breakwater, Greece

5. Case Study: Coastal Stabilization Structures
Work together with your Success Team
Need: Case Study Handout (1 per team)
Rules:
Closed book (starting now!)
Can use your notes
Rank each character’s idea
Put your rankings (#1, #2, #7) on the board
Be prepared to discuss your choices

6. Case Study: Santa Monica, California
See Figure in Trujillo and Thurman textbook
Dredge
Breakwater destroyed by waves in 1983
Before breakwater (1931)
After breakwater (1949)

7. Case Study: Santa Monica, California
Video: The Beach: A River of Sand (Part II)
Shows Santa Barbara Harbor and the problem its shore-connected breakwater created
Look for the Santa Monica breakwater (our Cast Study)
Good underwater footage of La Jolla Submarine Canyon

8. X. The Coast: Beaches and Shoreline Processes (Chapter 10)by
Al Trujillo
End