1. Coastal Components
GLY 2030C

2. Coastal Processes Beach form and process Sand on beaches is not static
Cross-shore Sediment Transport
Longshore Sediment Transport
Erosion factors
Most sand supplied by rivers – Damming effects
Tropical Cyclones
Erosion control structures
Some land use planning can minimize human effects
Eustatic sea level changes-worldwide, non-tectonic;
results from glacial melting and oceanic warming

3. Longshore Sediment Transport
Beaches are referred to as “rivers of sand” because their sediment is constantly in motion.
GLY 2030C

4. Littoral Cells and Sediment Budgets
Entire sediment cycle ( delivery, transport, and loss)

5. Wave Climate
Statistical description of wave height, period, and direction

6. Wave Climate
Statistical description of wave height, period, and direction

7. Wave Climate
Numerical Modeling of Wave Energy Flux and LST

8. Coastal Engineering Coastal erosion -often piece-meal approach
Engineering Structures -improve navigation and control erosion
Groins-perpendicular to shore; results in “scalloped” beaches
Breakwaters -intercept waves
Jetties- at mouths of rivers and inlets
GLY 2030C

9. Effects of “hard” solutions
GLY 2030C

10. Effects of “hard” solutions
GLY 2030C

11. “Soft” Solutions
Beach nourishment
GLY 2030C

12. Coastal Hazards Perception of and adjustment to coastal hazards
Bearing the loss (most common response)
Modify potential losses (better code enforcement)
“Armored Beaches” vs. “Living with It”
Philosophy
Coastal erosion is a natural process; problems derive from human structures
Any shoreline construction causes changes
Stabilization protects the few at the expense of the many
Engineering structures destroy the beaches they are designed to protect
Shoreline structures start a trend that is difficult, if impossible to reverse
GLY 2030C