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8/9/2019 Kahala Shoreline
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Kahala ShorelineCutting Specific Native Vegetation
Promotes ErosionMay 5th, 2008 June 18th, 2008
By: Stanton Johnston, 62 year resident of Kahala
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Kahala Beach on a normal day.
Naupaka is natures seawall.
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Low Tide
32 feet
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Extreme High Tide
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Medium High Tide
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Debris Line
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Ocean will access well into the
shorelines protecting foliage
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Before cutting Naupaka on right
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State demands the cutting of natural
seawall that protects the shoreline.
DLNR Photo
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Resident at 4623 Kahala Avenue
follows orders
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Removal begins
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Shoreline now exposed to erosion.
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Path to beach has changed.
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Beach exposed to soil contamination.
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Cut-back completed.
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Before High Tide
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High Tide
Erosion Obvious
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Water now removing shoreline.
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Erosion Evident
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Soil & Debris Pollution
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Shoreline drastically changed.
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Almost 2ft. of erosion.
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Private property eroded by approx. 6ft.
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Beach formerly at top of footing.
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Salt water kills plant & tree roots.
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This happened overnight!
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Result after Naupaka removed
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Bank continues to erode - other
vegetation now threatened.
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Through erosion all Naupaka in this
section was claimed by ocean
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First heavy rain will add to attrition.
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Threecoconut
treesnow
in
peril!
x
# 1
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x
#2 #3
x
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Hunakai Beach Access
Erosion
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Other locations eroding as well, such
as 4607 Kahala Avenue.
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The Hau at 4615 Kahala Avenue
shouldbe cut back.
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Hau encroaches
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blocking the beach access.
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Hau does not prevent erosion.
N k di i h l
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Naupaka dies with salt exposure,
somewhat containing its spread.
Before: Cost of this cutback $6 500 00
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Before: Cost of this cutback $6,500.00
DLNR Photo
Aft
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After: High Tide stilllimits beach access,regardless of cutback.
High water mark
for last high tide.
D i hi h tid b h i till
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During high tide, beach is still
dangerous, cutback has no effect
The public should not be encouraged
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The public should not be encouraged
to traverse the beach during
dangerous high tides
N k th h
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Naupaka armors the shore,
which deters erosion.
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Hunakai Access
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This is only a periodic high tide
Heavy rain, extreme high tide, storm
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Heavy rain, extreme high tide, stormsurf, hurricane and tsunami
will be MUCH worse.
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Sand may temporarily return
Shoreline wont return damage is
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Shoreline wont return, damage is
irreversible.
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Kahala Beach 1949
Beach has since
disappeared
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Kahala Beach 1967
UH SOEST Erosion Chart
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UH SOEST Erosion Chart
SOEST
School of Ocean and Earth Science and Technology
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Erosion - Accretion
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How to solve the problem:
1. Rescind the demand for cutting of native Naupaka in erosionprone areas.
2. Approach the situation of beach vegetation on a case-by-casebasis, and not by using a global approach of removal.
3. Cut back the encroaching Hau which does not contribute to
erosion prevention but impedes beach access.4. Recommend erosion prevention methods to help stabilize theshoreline, to include an incentive for the planting of indigenouserosion preventing vegetation.
5. Establish a committee to look into the causes of the Kahala Beacherosion and accretion, to include the hiring of an independent
investigator to try and answer the question Why.6. Consider the availability of funds from City and County, State of
Hawaii, Federal agencies and the private sector for independentresearch and possible beach replenishment and other remedies.
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Summary: Cutting of the native Naupaka in erosion prone areas does not produce any significant
beach access, but leads to serious attrition problems which puts the public, residentsand property at risk.
The public should not be encouraged to walk down a beach or access the murky and
treacherous waters at very high tide, as it is dangerous.
We have a lot to learn about our changing island and ever-changing environment.
Nature has a natural way of protecting our resources, which we must respect. We need
to protect our beautiful beaches or lose them forever. To pass on a Hawaii withoutsandy beaches to generations to come would be a terrible tragedy.
We have unfortunately learned by recent example, the tragic loss of a section of Kahala
shoreline.
The sand may temporarily return but the shoreline will not. This damage is irreversible.
If you remove natures native armor of the shoreline, it will increase erosion, pollute theocean, help kill the reef, and ultimately our beach will disappear. We see severe
evidence of this happening right now.
Access to our beaches should be provided to everyone but not at the expense of
forever losing our natural beach due to government mismanagement. Please reconsider
the cutting directive of native Naupaka in erosion prone areas.