Coastal Erosion

• Hydrological (Sea Level Rise)

• Meteorological (Storms and Hurricanes)

• Geological (Subsidence)

• Biological (Bioerosion)

• Manmade Structures (Jetties, Groins, Breakwaters, etc.)

http://www.ecy.wa.gov/programs/sea/coast/erosion/washaway.html

                  

 

                     

 

                      

 

                  

 

                 

  

                    

  

                     

  

                 

  

                 

  

                    

  

                     

  

                 

  

                  

 

                     

 

                      

 

                  

 

   

                

      

                

       

                

   

                

                                                      

 October 1989 May 1990

Average Distance Change=180ft/0.6 yr

                                                      

 November 1993Average Distance Change=

670 ft/3.6 yrs

November 1995Average Distance Change=

440ft/1.9 yrs

"Before" and "after" photos show the loss of sand on Louisiana's Raccoon Island caused by Hurricane Andrew in 1992. More than a mile of previously

existing sandy beach (above) was removed by the hurricane, leaving behind a patchy island formation (below). The remaining island shown close up in

the picture on the bottom is bordered in a rectangle in the picture on the top and is all that remains of the original island.