EQUILIBRIUM BEACH PROFILE

3/2AxhA is the profile scale factor, much more detail in later chapters

EQUILIBRIUM BEACH PROFILE

Steeper than equilibrium

Excess sediment on profile.

Sediment needs to be transported offshore to re-attain equilibrium

Flatter than equilibrium

Shortage of sediment on profile.

Sediment needs to be transported onshore to re-attain equilibrium

EQUILIBRIUM BEACH PROFILE

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)

SPITS

Coastal Processes with Engineering Applications (Dean and Dalrymple)

SPITS

HOME FOR SALE

SPITS – BAYMOUTH BARRIER

http://collections.ic.gc.ca/geoscience/images/detail/A94S0061.jpg

TOMBOLO

Don’t stare too hard

INLETS

Coastal Processes with Engineering Applications (Dean and Dalrymple)

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.

BARRIER ISLAND

www.uflib.ufl.edu St. Augustine Inlet, FL, 1960

St. Augustine Inlet, FL, 1942

BARRIER ISLAND

North Bunces Key, FLAssisted by vegetation trapping of sand

Outer Banks, NC

www3.csc.noaa.gov

Dauphin Island, AL.What assists Island maintenance here?