EQUILIBRIUM BEACH PROFILE

1
EQUILIBRIUM BEACH PROFILE
A is the profile scale factor, much more detail
in later chapters
2
EQUILIBRIUM BEACH PROFILE
Steeper than equilibrium
Excess sediment on profile. Sediment needs to be
transported offshore to re-attain equilibrium
3
EQUILIBRIUM BEACH PROFILE
Flatter than equilibrium
Shortage of sediment on profile. Sediment needs
to be transported onshore to re-attain equilibrium
4
SHORLINE OF SUBMERGENCE
Energy eventually distributed over a wider surf
zone and planform irregularities get smoothed out.
Coastal Processes with Engineering Applications
(Dean and Dalrymple)
5
SPITS
Coastal Processes with Engineering Applications
(Dean and Dalrymple)
6
SPITS
HOME FOR SALE
7
SPITS BAYMOUTH BARRIER
http//collections.ic.gc.ca/geoscience/images/deta
il/A94S0061.jpg
8
TOMBOLO
Dont stare too hard
9
INLETS
Often see build up of sediment on updrift side of
inlet, especially if it is jettied.
Can get overlapping of downdrift barrier
especially when no jetties exist.
Coastal Processes with Engineering Applications
(Dean and Dalrymple)
10
BARRIER ISLAND
St. Augustine Inlet, FL, 1942
St. Augustine Inlet, FL, 1960
www.uflib.ufl.edu
11
BARRIER ISLAND
Outer Banks, NC
North Bunces Key, FL Assisted by vegetation
trapping of sand
Dauphin Island, AL. What assists Island
maintenance here?
www3.csc.noaa.gov