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Dredging Operations Technical Support Program Evaluation Of Hopper Loading And Overflow For Saginaw River Michigan
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Book Synopsis Dredging Operations Technical Support Program: Evaluation of Hopper Loading and Overflow for Saginaw River, Michigan by : Michael R. Palermo
Download or read book Dredging Operations Technical Support Program: Evaluation of Hopper Loading and Overflow for Saginaw River, Michigan written by Michael R. Palermo and published by . This book was released on 1989 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US Army Engineer District, Detroit, maintains a navigation channel in the Saginaw River near Saginaw, MI. The sediments in some reaches contain metals and polychlorinated biphenyls (PCHBs). A hopper dredge is normally used, and overflow of the hopper is sometimes practiced to increase the load of solids for transport to the disposal area. The Detroit District has initiated a policy of no overflow in reaches of the channel where sediment PCB concentrations exceed 10 mg/kg (dry weight). However, there is concern over the possible impact of overflow from hopper dredging operations when sediments are dredged from other reaches of the channel where sediment PCB concentrations are less than 10 mg/kg. This report describes an evaluation of hopper loading and overflow characteristics of the Saginaw River conducted during August and September 1987. The study was designed to evaluate the effectiveness of increasing the hopper load during overflow and to determine the physical and chemical characteristics of the overflow for the Saginaw project. Keywords: Contaminated sediments, Dredging equipment, Overflow, Polychlorinated biphenyls, Water quality. (sdw).
Book Synopsis Dredging Operations Technical Support Program: Engineering Design and Environmental Assessment of Dredged Material Overflow from Hydraulically Filled Hopper Barges in Mobile Bay, Alabama by :
Download or read book Dredging Operations Technical Support Program: Engineering Design and Environmental Assessment of Dredged Material Overflow from Hydraulically Filled Hopper Barges in Mobile Bay, Alabama written by and published by . This book was released on 1990 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barge overflow was investigated as a cost-effective option for future dredging needs in Mobile Bay, Alabama. Tests of hopper barge loading characteristics with overflow operations were conducted in Mobile Bay. In theory, overflow would allow denser materials to settle within the barge while less dense materials were shunted overboard. Increased density of barge-held materials would then translate to cost savings via a reduced requirement for transport to a distant approved disposal site. Thus, one major objective of the study was an engineering evaluation of equipment performance during the tests. A second major objective was to obtain field data for an assessment of the environmental consequences of overflow. In support of both objectives, modeling studies were performed to simulate overflows that would be associated with routine dredging operations. Eight separate tests were conducted. Three tests occurred at a site in lower Mobile Bay, and five tests at an upper bay site. Three tests (one lower bay, two upper bay) involved dredging in maintenance materials, and five tests (two lower bay, three upper bay) involved new work or deepening materials.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1990 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Field Evaluation of Hopper Dredge Overflow for the Delaware River by :
Download or read book Field Evaluation of Hopper Dredge Overflow for the Delaware River written by and published by . This book was released on 2002 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hopper dredges are often loaded past the point of overflow for economic reasons. As the hopper is filled, dredged material is stored in the hopper until overflow begins. The density of the hopper contents is increased by allowing the low-density supernatant to overflow back into the waterway. As the low-density supernatant overflows, the average density of the hopper contents increases. Thus, more material can be transported per trip to the disposal site or facility resulting in an economical loading. There is normally a tradeoff between the potential economic benefits and potential environmental effects. Overflow results in increased water column turbidity, and supernatant solids may be redeposited near the dredge site. Also, if sediments are contaminated, the overflow may result in some release of contaminants to the water column. Therefore, the relationship between dredge production, density of the hopper load, and the rate of material overflow are important variables in maximizing the efficiency of the dredging operation while minimizing harmful contaminant release.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Norsk biografisk leksikon by : Edvard Bull
Download or read book Norsk biografisk leksikon written by Edvard Bull and published by . This book was released on 1923 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dredging Research Program. Laboratory Testing of Methods to Increase Hopper Dredge Payloads: Model Hopper Bin Facility and Centrifugal Solids Concentrator by :
Download or read book Dredging Research Program. Laboratory Testing of Methods to Increase Hopper Dredge Payloads: Model Hopper Bin Facility and Centrifugal Solids Concentrator written by and published by . This book was released on 1992 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is common practice to fill beyond overflow on dredge hoppers and scows to achieve load gains. However, some of the US Army Corps of Engineers Districts do not permit overflow due to actual or perceived environmental or economic reasons. It is generally not known whether overflowing is beneficial in increasing the hopper payload in fine-grained sediments (silt and clay size), although some studies have indicated a minimal increase in hopper loads when filled to overflowing. Under the Dredging Research Program (DRP) Work Unit, Technology for Monitoring and Increasing Dredge Payload for Fine-Grained Sediments, several experimental methods were investigated to determine their effect on increasing the payload of fine-grained dredged material. Several devices were tested in a scale model hopper constructed at the US Army Engineer Waterways Experiment Station Hydraulics Laboratory. These devices included three types of hydrocyclones (centrifugal separators), various diffuser designs, and different arrays of internally mounted inclined plates. A solids concentrator device was also evaluated for increasing the load of fine sediments in the model hopper. This report presents the description and method of the testing programs and the study findings. The inclined plate and solids concentrator devices demonstrated some level of success when tested with silt-sized materials (particle size 10 to 63 microns)., The inclined plate method was the most successful for increasing payload in the model hopper; however, prototype use of this technique could substantially increase the weight of a hopper dredge unless a lightweight version is developed. Diffusers, Hydrocyclones, Overflow, Fine- grained sediment, Inclined plates, Plates, Hopper dredges, Load gain.
Book Synopsis Assessment and Remediation of Contaminated Sediments by : Danny Reible
Download or read book Assessment and Remediation of Contaminated Sediments written by Danny Reible and published by Springer Science & Business Media. This book was released on 2007-01-21 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this text, drawn from presentations and discussion at a May 2005 NATO Advanced Research Workshop, current approaches to the assessment and remediation of contaminated sediments are discussed with emphasis on in-situ management. The text addresses physical, chemical and biological approaches for the assessment and remediation of sediments. The development of regulatory and strategic approaches is discussed with emphasis on the potential for biological remediation in the management of contaminated sediments.
Book Synopsis Sediment Classification Methods Compendium by : United States. Environmental Protection Agency. Sediment Oversight Technical Committee
Download or read book Sediment Classification Methods Compendium written by United States. Environmental Protection Agency. Sediment Oversight Technical Committee and published by . This book was released on 1992 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is a compendium of scientifically valid and accepted methods that can be used to assess sediment quality and predict ecological impacts...the intent here is to provide the most useful overall measures or predictors of ecological impacts currently in use rather than procedures that may have limited application outside of a particular regulatory framework... parag The information provided in the compendium on the relative strengths and weaknesses of the different assessment methods can provide assistance in selecting the appropriate methods.
Author :Division on Engineering and Physical Sciences Publisher :National Academies Press ISBN 13 :0309054931 Total Pages :318 pages Book Rating :4.3/5 (9 download)
Book Synopsis Contaminated Sediments in Ports and Waterways by : Division on Engineering and Physical Sciences
Download or read book Contaminated Sediments in Ports and Waterways written by Division on Engineering and Physical Sciences and published by National Academies Press. This book was released on 1997-04-20 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contaminated marine sediments threaten ecosystems, marine resources, and human health. They can have major economic impacts when controversies over risks and costs of sediment management interfere with needs to dredge major ports. Contaminated Sediments in Ports and Waterways examines management and technology issues and provides guidance that will help officials make timely decisions and use technologies effectively. The book includes recommendations with a view toward improving decision making, developing cost-effective technologies, and promoting the successful completion of cleanup projects. The volume assesses the state of practice and research and development status of both short-term and longer-term remediation methods. The committee provides a conceptual overview for risk-based contaminated sediment management that can be used to develop plans that address complex technological, political, and legal issues and the interests of various stakeholders. The book emphasizes the need for proper assessment of conditions at sediment sites and adequate control of contamination sources.
Author :Permanent International Association of Navigation Congresses Publisher :PIANC ISBN 13 :2872230874 Total Pages :111 pages Book Rating :4.8/5 (722 download)
Book Synopsis Approach Channels by : Permanent International Association of Navigation Congresses
Download or read book Approach Channels written by Permanent International Association of Navigation Congresses and published by PIANC. This book was released on 1997 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Saginaw Bay Water Circulation by : L. J. Danek
Download or read book Saginaw Bay Water Circulation written by L. J. Danek and published by . This book was released on 1975 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Dictionary of Epidemiology by : Miquel S. Porta
Download or read book A Dictionary of Epidemiology written by Miquel S. Porta and published by Oxford University Press, USA. This book was released on 2014 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition is the most updated since its inception, is the essential text for students and professionals working in and around epidemiology or using its methods. It covers subject areas - genetics, clinical epidemiology, public health practice/policy, preventive medicine, health promotion, social sciences and methods for clinical research.
Download or read book Commerce Business Daily written by and published by . This book was released on 2000 with total page 1634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Environmental Engineering Dictionary and Directory by : Thomas M. Pankratz
Download or read book Environmental Engineering Dictionary and Directory written by Thomas M. Pankratz and published by CRC Press. This book was released on 2000-09-22 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like most technical disciplines, environmental science and engineering is becoming increasingly specialized. As industry professionals focus on specific environmental subjects they become less familiar with environmental problems and solutions outside their area of expertise. This situation is compounded by the fact that many environmental science
Book Synopsis Cadmium in the Environment by : Mislin
Download or read book Cadmium in the Environment written by Mislin and published by Birkhäuser. This book was released on 2013-03-08 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
