below, not to me. -Dave Mellinger
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From: Dagmar Fertl <[EMAIL PROTECTED]>
Date: Fri, 26 Mar 2004 02:15:36 -0800
Subject: Shock wave/sound propagation modeling for marine protected species
impact zones during explosive removal of offshore structures (fwd)
Shock Wave/Sound Propagation Modeling Results for Calculating Marine
Protected Species Impact Zones during Explosive Removal of Offshore
Structures
OCS Study MMS 2003-059
The Minerals Management Service (MMS), Gulf of Mexico OCS Region,
announces the availability of a new study, Shock Wave/Sound Propagation
Modeling Results for Calculating Marine Protected Species Impact Zones
during Explosive Removal of Offshore Structures.
Available by PDF at
<a
href="http://www.gomr.mms.gov/homepg/regulate/environ/studies/2003-059.pdf";
rel="nofollow">http://www.gomr.mms.gov/homepg/regulate/environ/studies/2003-059.pdf</a>
For underwater calculator, you need to go to:
<a href="http://www.gomr.mms.gov/homepg/whatsnew/publicat/gomr/recpub.html";
rel="nofollow">http://www.gomr.mms.gov/homepg/whatsnew/publicat/gomr/recpub.html</a>
Then scroll down to this study and find a link to calculator that
downloads.
The objective of this study was to develop a method to determine shock
wave propagation into water caused by the explosive removal of offshore
structures. The objective was accomplished by performing numerical
simulations of various explosive, pile, clay, and marine environments and
determining the amount of energy coupled to the water. The numerical
simulations demonstrated that less energy is coupled to the water for the
detonation within a piling than would be coupled for free-water
explosions. In addition, the simulations showed that a reduction of
coupled energy into the water was dominated by pile confinement.
Parametric numerical simulations were performed for a range of typical
pile diameters, wall thicknesses, and explosive weights. From these
results, a model was developed to predict the explosive efficiency factors
for several scenarios. Finally, the UnderWater Calculator spreadsheet was
developed to predict peak pressure, acoustic impulse, and energy flux
density for both the free water and within piling detonations. The study
describes the underwater shock wave/sound propagation model's development,
design, and results.
This study is available only in compact disc format. The discs are
available from the Minerals Management Service, Gulf of Mexico OCS Region,
at a charge of $15.00 by referencing OCS Study MMS 2003-059. You will be
able to obtain this study also from the National Technical Information
Service in the near future. Here are the addresses. You may also inspect
copies at selected Federal Depository Libraries.
Minerals Management Service
Gulf of Mexico OCS Region
Public Information Office (MS 5034)
1201 Elmwood Park Boulevard
New Orleans, Louisiana 70123-2394
Telephone requests may be placed at
(504) 736-2519, 1-800-200-GULF, or
FAX: (504) 736-2620
U.S. Department of Commerce
National Technical Information Service
5285 Port Royal Road
Springfield, Virginia 22161
(703) 487-4650 or FAX: (703) 321-8547
Rush Orders: 1-800-336-4700
MMS is the Federal agency in the U.S. Department of the Interior that
manages the nation's oil, natural gas, and other mineral resources on the
outer continental shelf in Federal offshore waters. The agency also
collects, accounts for, and disburses mineral revenues from Federal and
American Indian leases. These revenues totaled over $6 billion in 2002 and
nearly $127 billion since the agency was created in 1982. Annually, nearly
$1 billion from those revenues go into the Land and Water Conservation
Fund for the acquisition and development of state and Federal park and
recreation lands.
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