Webmap Oahu Shoreline Change Rates (simple)
http://uhm.maps.arcgis.com/apps/View/index.html?appid=63e8dc0babb64159a05f2232a8915954 

Webmap Oahu Shoreline Change (all)
http://uhm.maps.arcgis.com/apps/View/index.html?appid=9b7bed18b79e4b61b4fc0306abe14024

To download/access the datasets:
Go to: https://www.arcgis.com/home/index.html 

In the search bar you can look up: 
'Oahu shoreline change'

All the layers related to Oahu showup.