Vegetated dune, Kanaha, Maui. Naupaka shrub and 'aki'aki and pohuehue (with purple flowers) ground...
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Transcript of Vegetated dune, Kanaha, Maui. Naupaka shrub and 'aki'aki and pohuehue (with purple flowers) ground...
Vegetated dune, Kanaha, Maui. Naupaka shrub and 'aki'aki and pohuehue (with purple flowers) ground cover at center, 'aki'aki (sparse ground cover) in background.
Close up of 'aki'aki. Photo from JOHNSTONE, 1997.
Close up of 'akulikuli. Photo from JOHNSTONE, 1997.
Close up of pohuehue, Honokahua, Maui Common name: beach morning glory
1. An abundant supply of loose sand in a region devoid of vegetation
2. A wind energy source sufficient to move sand grains
3. A topography whereby sand particles lose their momentum and settle out
Composition of Beach sand in Composition of Beach sand in Hawaii:Hawaii:• Coral
• Shells
• Sponge spicules
• Calcareous algae
• Volcanic particles
Black Sand BeachBig Island
Green Sand BeachBig Island
Red Sand BeachMaui
0.01 mybp
1.6 mybp
Sea-Level Rise Wave/Current Action
Coastal Erosion
Sediment Deficiencies• Sand mining• Dune grading• Sand impounding (behind shoreline structures)• Water quality degradation• Harbor/navigational channel construction
Lanikai
Reasons to Protect Hawaii's Beaches• Multi-billion dollar visitor economy • They are critical in flood and erosion
prevention • They are a part of Hawaii's culture and
heritage. • Beaches and dunes are important elements
of our shoreline environment and are critical to the health of the coastal marine ecosystem.