HomeMy Public PortalAboutBorrelli_Brewster_Coastal_Adaptation_2-lo-resOverview
• Coastal Processes
• Erosion Control Structures
• Coastal Change and Sediment Budgets
Waves
• 1 cubic meter of seawater = 1 metric tonne
• On average a wave hits the shoreline every 6
seconds
– 600/hr
– 14,400/day
– 5.2 million/year
– 395 million/lifetime (for men)
– 421 million/lifetime (for women)
Longshore
Sediment
Transport
Coastal Sediment Transport
Longshore and Cross-shore
“River of Sand”
• ~500,000 cubic yards of LST/year
• ~1370 cubic yards of LST/day
• 137 Dump Trucks sand/day rolling down beach
• One every ~10 minutes!
Rates of
Longshore Sediment Transport
Cross-shore Sediment Transport
Fair-weather (Summer) Profile
Storm (Winter) Profile
Seasonal Changes to Beach
‘Dynamic
Equilibrium’
8
~10$
Erosion Control Structures Erosion Relocation Structures
1 Groin è Groin Field
Erosion Control Structures
Seawalls and Sediment Transport
Seawalls vs. Beaches
Erosion + Seawall = More Erosion
‘Coastal Change’
Littoral
Cells
Sources
And Sinks
~7-‐9&
½
mile
~11-‐13
&