[Coral-List] Vessel grounding stabilization and coral relocation

[Tom Moore]

Thaddeus,
Cement works great provided you are securing to a stable consolidated reef.  If you are securing to an unconsolidated reef or rubble area you will need to ensure the structures are large enough to prevent scour and storm movement..  Rubble can present a number of problems at grounding sites but the techniques to deal with it tend to be very site specific. A number or us have done quite a bit of grounding work and can probably give you some ideas if you can give us some more details on the situation at your site.  

Tom

------------------
Tom Moore
NOAA Restoration Center


Sent from my wireless.

On Jul 13, 2012, at 12:32 AM, Greg Challenger <gchallenger at msn.com> wrote:

> I wouldn't worry about the engineer.  If corals were present at the site prior to the grounding, cement is stronger than the limestone.  Ive used cement in about 40 groundings without a problem (or an engineer),  although the engineer could tell you if you need to stabilize large pieces at all given depth and significant wave height
> 
> Greg Challenger
> 
> Sent from my iPhone
> 
> On Jul 11, 2012, at 7:43 PM, "Robert Bourke" <rbourke at OCEANIT.COM> wrote:
> 
>> Thaddeus;
>> A good place to begin reviewing techniques used for re-stabilization of shattered coral reef substrate would be "Coral Reef Restoration Handbook" edited by W. Precht.    A primary factor governing your choice of methods will be the wave and current energy regime of your specific site.  As you appear knowledgeable in the biological side of the design equation, I suggest you contact a coastal engineer with experience in wave energy and stability calculations before making too much progress along any particular design path..
>> 
>> Bob Bourke
>> Environmental Scientist
>> Oceanit
>> 
>> -----Original Message-----
>> From: coral-list-bounces at coral.aoml.noaa.gov [mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of thaddeus nicholls
>> Sent: Wednesday, July 11, 2012 2:45 AM
>> To: coral-list at coral.aoml.noaa.gov
>> Subject: [Coral-List] Vessel grounding stabilization and coral relocation
>> 
>> Greetings Coral Listers, 
>> I have been presented with a project that involves restabilization of rubble and coral head (up to 1m dia) relocation after a vessel grounding.  My personal coral reef experience has been primarily associated with ecosystem health and monitoring rather than rubble stabilization and coral head relocation, and was hoping that some of you could point me in the direction of some good literature/references/methods for performing such tasks.  The work statement discusses using rebar and concrete for some of the work (which seem like reasonable methods), however I would like to review other alternative methods as well, if any.  Thanks for your time, hope to hear from some of you soon.
>> 
>> Thaddeus Nicholls
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