Dredged Material Isolation On The Abyssal Seafloor
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Dredged Material Isolation On The Abyssal Seafloor
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Author : Philip J. Valent
language : en
Publisher:
Release Date : 1997
Dredged Material Isolation On The Abyssal Seafloor written by Philip J. Valent and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Technology & Engineering categories.
This report is the result of an examination of the feasibility of isolating contaminated dredged material on the abyssal seafloor. The focus is on the technical and environmental factors that constrain the considerations of feasibility. The sources of the materials are assumed to be in U.S. coastal waters. A thorough conceptual design of a dredging to abyssal deposition system is analyzed with regard to each subsystem and to the entire operational concept. These subsystems include: (1) a low leakage dredge, (2) equipment for material handling and loading into geosynthetic fabric containers (GFCs), (3) the barge for transport and navigation, and (4) the subsystem for releasing the GFCs to sink to the abyssal seafloor isolation site. Particular consideration is given to the exclusion of dredged material from the ocean's productive zone in the upper 1000 m; this exclusion requires highly stable, reliable navigation and seakeeping by the barge transporter and control of the configuration of GFCs within it. New theoretical models and previous empirical results are used to predict GFC motion through the water column and response to impact on the abyssal seafloor, including the case of potential release of contaminated, turbid water at impact. A geochemical model of the temporal and spatial evolution of the post-deposition geochemistry of the water column, the GFC contents and the sediments below is developed and analyzed; the results show that release of metals into the ocean waters would be insignificant. A model of the biological impacts of the introduction of dredged material in the abyssal environment is used to infer that: (1) biological diversity in the vicinity of the deposition site will be diminished, (2) biomass will be increased by dominance of a few fast growing, opportunistic benthic species, and (3) concentrations of trace elements and organic contgt\h1
Study Of Abyssal Seafloor Isolation Of Contaminated Sediments Concluded
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Author :
language : en
Publisher:
Release Date : 1998
Study Of Abyssal Seafloor Isolation Of Contaminated Sediments Concluded written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Recognizing the rapidly decreasing availability of disposal sites on land, in 1993 Congress directed the Department of Defense to assess the technical and scientific feasibility of isolating contaminated dredged material on the abyssal seafloor. The Naval Research Laboratory (NRL) conducted and managed the assessment, which was funded during its first year by the Strategic Environmental Research and Development Program and in the following two years by the Defense Advanced Research Projects Agency. NRL carried out the projects in collaboration with participants from academic institutions and industrial organizations. The seafloor isolation concept is an attractive management option for contaminated dredged material because. if abyssal Isolation is feasible and environmentally sound, air, land, or water supplies would not be contaminated. The participants concluded that it is technically and environmentally feasible. In ports where shipping costs are high. abyssal seafloor isolation is a cost- competitive strategy. They also outlined the architecture of a system to monitor conditions at the site and to detect and measure possible leaks of contaminated material.
An Economic Analysis Of Abyssal Seafloor Waste Isolation
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Author : Di Jin
language : en
Publisher:
Release Date : 1995
An Economic Analysis Of Abyssal Seafloor Waste Isolation written by Di Jin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Abyssal zone categories.
Oceanography
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Author : United States. Congress. House. Committee on National Security. Subcommittee on Military Research and Development
language : en
Publisher:
Release Date : 1996
Oceanography written by United States. Congress. House. Committee on National Security. Subcommittee on Military Research and Development and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Science categories.
Security Challenges Posed By China
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Author : United States. Congress. House. Committee on National Security
language : en
Publisher:
Release Date : 1996
Security Challenges Posed By China written by United States. Congress. House. Committee on National Security and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with History categories.
Deep Ocean Relocation Of Dredged Material Transporting And Emplacement
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Author :
language : en
Publisher:
Release Date : 1997
Deep Ocean Relocation Of Dredged Material Transporting And Emplacement written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Each year, 400 million cubic yards of sediment are dredged in the United States of which 3 to 5 percent is polluted and cannot be used beneficially or returned to the environment near dredging sites. Disposal of this polluted, dredged material is a national problem. One solution to this problem is to relocate and isolate polluted dredged material to the seafloor of the abyssal ocean, considered to include those depths greater than 300 m. SimDOR, a project sponsored by the Defense Advanced Research Projects Agency, focused on simulation of the scientific and technical issues involved with this disposal option. SimDOR, which stands for Simulation of Deep Ocean Relocation of Dredged Material, concentrated primarily on sites of the abyssal seafloor of the North Atlantic Ocean and considered dredged material coming from to the eastern seaboard of the United States. Results from the SimDOR project are also generally applicable to west coast and Gulf of Mexico ports. The SimDOR project took advantage of recent advances in numerical modeling capabilities, simulation concepts, and visualization technology. Simulations identified are predicted effects of this disposal option including the dredging and relocation procedures as well as the resulting environmental impact. Simulation of the entire process from dredging through long-term impact on the abyssal environment allowed engineers, scientists. environmentalists, and the public an opportunity to study and understand all aspects of this option. Systems to dredge sediments, load containers, transport them to the ocean site, and ensure their safe descent to the abyssal seafloor were designed, simulated and evaluated.
Summary Engineering Report For Abyssal Plains Waste Isolation Project
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Author : J. Michael Hightower
language : en
Publisher:
Release Date : 1995
Summary Engineering Report For Abyssal Plains Waste Isolation Project written by J. Michael Hightower and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Abyssal zone categories.
Ecosystems Of The Deep Oceans
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Author : P.A. Tyler
language : en
Publisher: Elsevier
Release Date : 2003-03-27
Ecosystems Of The Deep Oceans written by P.A. Tyler and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-03-27 with Science categories.
This volume examines the deep sea ecosystem from a variety of perspectives. The initial chapters examine the deep-sea floor, the deep pelagic environment and the more specialised chemosynthetic environments of hydrothermal vents and cold seeps. These environments are examined from the perspective of the relationship of deep-sea animals to their physico-chemical environment. Later chapters examine the biogeography of the main deep oceans (Atlantic, Pacific and Indian) with particular attention to the downward flux of surface-derived organic matter and how this drives the processes within the deep-sea ecosystem. The peripheral deep seas including the polar seas and the marginal deep seas (inter alia the Mediterranean, Red, Caribbean and Okhotsk seas) are explored in the same context. The final chapters examine the processes occurring in the deep sea and include an analysis of why the deep sea has high species diversity, how the fauna respond to organic input and how species have adapted reproductive activity in the deep sea. The volume concludes with an analysis of the anthropogenic impact on the deep sea.
Technical Assessment Report For Abyssal Plains Waste Isolation Project
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Author : J. Michael Hightower
language : en
Publisher:
Release Date : 1995
Technical Assessment Report For Abyssal Plains Waste Isolation Project written by J. Michael Hightower and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Abyssal zone categories.
Underwater Technology
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Author :
language : en
Publisher:
Release Date : 1996
Underwater Technology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Ocean engineering categories.