2008-2010 Kahala Beach Erosion Documentation

8/9/2019 2008-2010 Kahala Beach Erosion Documentation

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E komo maiScribd.com/SaveKahalaBeach

Beach (Kahakai)

The legendary Naupaka Kahakai is an indigenous plant defending our seashore. It is there for a practical

reason, to naturally armor the Ae Kai (shoreline) from erosion, and should be respected for its historical

mission.

KAHALA BEACH

SHORELINE

EVIDENCE OF CUTBACK EROSION


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4623 Kahala Avenue - Before Cutback


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4623 Kahala Avenue After Cutback


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4623 Kahala - Erosion

High Tide

was at

4:10p.m.

2.66ft


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4623 Kahala Avenue

High Tide


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4615 Kahala Avenue

Adjacent Location


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4615 Kahala Avenue

Was safe shoreline access achieved to ensure public transit of beach corridors with the cutting back of

native vegetation? The Naupaka Kahakai is gone and has been replaced by seawalls!

Beach access was not achieved, but dangerously obstructed at high tide.


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4623 Kahala Avenue


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NATURES

SHORELINE

PROTECTION

Naupaka Kahakai (Beach) naturally protecting the Ae Kai shoreline.


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Naupaka is a seawall that does not contribute to erosion

like man made seawalls. Here shows how it protected the

property during a hurricane. Residents will be forced to

build fences and try to construct concrete seawalls if the

vegetation is gone.

4653 Kahala Avenue


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Erosion &

Ecological

Damage


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Sand Erosion &

Replenishment


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Construction &

Sand

Replenishment


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Erosion:

For the year of 2010 you should see just normal erosion through the months of March, April,

and May, barring any major storms.

Starting June 11 you will start to see considerable erosion as the tide hits 2.4 feet. July 9 willprovide 4 following days of considerable erosion as the tides hit 2.5 feet.

August 6 will also provide 4 days of heavy erosion as the tide will then hit 2.5 feet as well.

November will bring another heavy erosion pattern starting on the 5th

through the 9th

as a 2.5

foot height will also be reached.

December 4th

will also provide 4 following days of heavy erosion.

These are estimates based on previous indicators of erosion patterns of which storms will

exacerbate this serious erosion problem.

Questions:

1.Were any state funds used for the Kahala beach erosion project?2.Was there and Environmental impact statement and shoreline certification approval?3.What will happen after 1 year when the temporary seawall falls apart?4.Who is liable if someone is injured by sandbags walking down beach at high tide?5.Who is responsible for the ecological damage to the marine life created by the replenishedsand sediment?


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Bottom Line

Factual Historical Information

1. Eighty five years of scientific documentation show that you always had to traverse the Kahala shoreline insea water at high tide.

2. There is a serious erosion problem taking place at the South West portion of Kahala Beach as documentedby SOEST.

3. In erosion prone areas, it is not the vegetation encroaching on the beach but the beach eroding making itappear the vegetation is blocking transit.

4. Since the 1925 accumulation of erosion evidence, the beach has not returned in the affected area.5. Cutting back and indigenous plant in erosion prone areas does not increase the publics ability to transit the

shoreline.

6. Removing the native Naupaka Kahakai increases shoreline erosion and will lead to armoring the shorelinewith seawalls as has been demonstrated. Temporary quick-fix seawalls only lead to concrete ones.

7. Seawalls are known to exacerbate erosion problems and limit safe public transit of beach corridors and inmost cases make it impossible to pass.

8. Depositing sand to try and replenish the beach leads to a serious ecological problem causing erodingsediment destroying marine life.

9. The Naupaka Kahakai helps protect beachfront residents from flooding and property damage. Removing orcutting back this protection in erosion prone areas will result in severe property destruction and financial

litigation.

10.Heavy trade winds and low tides will increase beach sand; however high tides will eventually erode thedeposited sand.

11.All beaches propose varied circumstances. A broad law will harm the environment in some areas.12.Passing Bill HB 1808, as written, will do more harm than good and will lead to grave consequences.


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Solution

There is a very simple solution to the problem of encroaching beach vegetation.

Just prohibit the direct watering of shoreline vegetation in accreting beach areas.

The illegal direct watering of shoreline vegetation with sprinklers, drip systems or hand watering

would be strictly prohibited and subject to fines.


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12:37p.m.

Tide 1.92

High 2.03

12:27p.m.

10-13-09

2008-2010 Kahala Beach Erosion Documentation

Documents

Transcript of 2008-2010 Kahala Beach Erosion Documentation