| Sedimentation: Potential Biological Effects of Dredging Operations in Estuarine and Marine Environments |
MAY 2005 |
14 pages |
| Authors:
Gary L. Ray; Douglas G. Clarke; Robert M. Engler; D. H. Wilber; W. Brostoff; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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 | During the process of dredging, sediments are excavated and relocated. At various points in the process some volume of sediment is injected into the water column, either at the dredging site or at the dredged material disposal site. The amounts may be relatively small (e.g., around operating hydraulic cutterheads) or substantial (e.g., unconfined open-water disposal). The fate of these resuspended sediments, even if uncontaminated, is source of concern. Potential detrimental ... |
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| Sedimentation: Potential Biological Effects of Dredging Operations in Estuarine and Marine Environments |
MAY 2005 |
15 pages |
| Authors:
D. H. Wilber; W. Brostoff; Douglas G. Clarke; Gary L. Ray; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| During the process of dredging, sediments are excavated and relocated. At various points in the process some volume of sediment is injected into the water column, either at the dredging site or at the dredged material disposal site. The amounts may be relatively small (e.g., around operating hydraulic cutterheads) or substantial (e.g., unconfined open-water disposal). The fate of these resuspended sediments, even if uncontaminated, is a source of concern. Potential ... |
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| Rates and Effects of Sedimentation in the Context of Dredging and Dredged Material Placement |
MAR 2005 |
12 pages |
| Authors:
Gary L. Ray; Douglas G. Clarke; Robert M. Engler; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| Dredging and disposal of dredged material in aquatic environments can expose animals and plants to episodic pulses of suspended sediment. Resuspended material can be deposited in thin layers adjacent to the dredging or disposal areas in some cases as much as several thousand meters distant (LaSalle et al. 1991). While our understanding of the potential effects of such far-field deposition is limited, some estuarine organisms may be highly sensitive to ... |
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| Characterization of Underwater Sounds Produced by Bucket Dredging Operations |
AUG 2001 |
18 pages |
| Authors:
Charles Dickerson; Kevin J. Reine; Douglas G. Clarke; Robert M. Engler; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| This technical note presents a characterization of underwater sounds produced by bucket dredging operations in Cook Inlet, Alaska. Both continuous sounds, such as those produced by propellers, pumps, and generators, and repetitive sounds produced by particular dredging events (e.g., dredge bucket striking the channel bottom,jaws of bucket clamping shut) are potential sources of underwater noise. This note examines the intensity, periodicity, and attenuation of emitted sounds from bucket dredging operations ... |
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| Subaqueous Cap Design: Selection of Bioturbation Profiles, Depths, and Process Rates |
AUG 2001 |
15 pages |
| Authors:
Douglas G. Clarke; Michael R. Palermo; Thomas C. Sturgis; Robert M. Engler; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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| When dredged material has been determined to contain contaminants that open-water placement would potentially cause to degrade the benthic environment, subaqueous capping with a layer of clean material may provide an acceptable management alternative. Subaqueous capping of in situ contaminated sediments also represents a potentially effective remediation option. For either practice to satisfy the requirement of isolation of the contaminated sediments, design of caps of clean material must account for ... |
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| Sturgeon Detection Using Biochemical Methods |
FEB 2001 |
8 pages |
| Authors:
Douglas G. Clarke; Ross S. Zinkevich; E. Vasileva; V. Kasumyan; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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| This technical note explores the concept of biochemical methodologies to survey waterways for the presence of sturgeon. Such a tool would enhance capabilities to detect sturgeon occupation of channel reaches in advance of dredging operations, and to direct longer-term inventories of habitat use within entire water basins. Coordination and management of navigation dredging projects can become very difficult if navigation channel reaches to be dredged are known to be frequented ... |
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| Description of the SSFATE Numerical Modeling System |
APR 2000 |
12 pages |
| Authors:
Billy H. Johnson; E. Andersen; T. Isaji; Allen M. Teeter; Douglas G. Clarke; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENGINEER RESEARCH AND DEVELOPMENT CENTER
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| This technical note describes the numerical modeling system SSFATE (Suspended Sediment FATE), which is being developed to compute suspended sediment fields resulting from dredging operations. Both theoretical aspects of the computations made within SSFATE and application aspects of the shell-based personal computer program are discussed. SSFATE was developed in response to a need for tools to assist dredging'project managers confronted by requests for environmental ... |
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| FISHFATE Users Guide: Spacially Temporally Explicit Population Simulation Model |
MAR 2000 |
15 pages |
| Authors:
Douglas G. Clarke; J. S. Ault; G. A. Meester; K. C. Lindeman; J. Juo; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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| The evaluation of alternative environmental windows for dredging operations, which represent a broad spectrum of project and site specific conditions (e.g., type of dredge plant, local hydrodynamics, bathymetry, etc.) requires development of a spatially and temporally explicit population simulation model. Unless spatial dynamics are accounted for, exploration of spatial and/or temporal alternatives is impractical and is of limited effectiveness (Pelletier and Magal 1996). ... |
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| Environmental Windows Associated with Dredging Operations |
DEC 1998 |
14 pages |
| Authors:
Kevin J. Reine; Dena D. Dickerson; Douglas G. Clarke; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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| This technical note summarizes the types of concerns that lead to requests for environmental windows for Federal navigation dredging projects in both marine and freshwater systems, as well as the frequencies of occurrence of these concerns among U.S. Army Corps of Engineer (USACE) Districts. The information presented is derived from responses received from a survey sent to all USACE District offices that perform operations and ... |
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| Economic Impacts of Environmental Windows Associated with Dredging Operations |
DEC 1998 |
18 pages |
| Authors:
Dena D. Dickerson; Kevin J. Reine; Douglas G. Clarke; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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| This technical note describes potential economic impacts that result from compliance with requests for environmental windows (i.e., temporal constraints) on dredging operations. The primary purpose of this effort was not to quantify the exact total cost attributable to environmental windows throughout the U.S. Army Corps of Engineers (USACE) dredging program, but rather to estimate incremental costs of windows compliance across a spectrum of dredging project ... |
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| Entrainment by Hydraulic Dredges - A Review of Potential Impacts |
OCT 1998 |
14 pages |
| Authors:
Kevin J. Reine; Douglas G. Clarke; Robert M. Engler; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
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| Effects of entrainment by hydraulic dredging operations on aquatic organisms have been and continue to be an issue of environmental concern. Clearly, assessment of actual impacts due to entrainment pose severe technical challenges. Studies to date illustrate the difficulties in determining precise estimates of absolute entrainment rates and have seldom been able to determine population-level consequences with any degree of confidence. Placing mortalities due to entrainment by dredges into a ... |
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| Dredging Operations Technical Support Program. A Framework for Assessing the Need for Seasonal Restrictions on Dredging and Disposal Operations |
JUL 91 |
78 pages |
| Authors:
Mark W. LaSalle; Douglas G. Clarke; Jurij Homziak; John D. Lunz; Thomas J. Fredette; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
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| Seasonal restrictions on dredging and/or disposal operations are based upon concerns about potential dredging- or disposal-induced negative impacts to biological resources. In many cases, however, information on the degree to which either naturally occurring or dredging-induced environmental alterations directly or indirectly affect organisms is poorly quantified, in which case restrictions are based upon a reason to believe notion. This report addresses the general acceptability of seasonal restrictions through a compilation ... |
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| Dredging Operations Technical Support Program: Engineering Design and Environmental Assessment of Dredged Material Overflow from Hydraulically Filled Hopper Barges in Mobile Bay, Alabama |
SEP 90 |
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| Authors:
Douglas G. Clarke; Jurij Homziak; Robert L. Lazor; Michael R. Palermo; Glynn E. Banks; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB
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 | 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 ... |
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| Habitat Utilization by Juvenile Pink and Chum Salmon in Upper Resurrection Bay, Alaska |
NOV 89 |
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| Authors:
Mary W. Faurot; Steve W. Landino; Reg R. Reisenbichler; Douglas G. Clarke; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
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| Patterns of habitat utilization by pink (Oncorhynchus gorbuscha) and chum (O. keta) salmon were studied in Resurrection Bay at a proposed small-boat harbor construction site near Seward, AK. Relative distribution and abundance of salmon fry and their predators were determined by beach seining during the outmigration period at six stations in upper Resurrection Bay; estuarine residence time of salmon fry was determined by otolith analysis; and predation on salmon fry ... |
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| Benthic Resources Assessment Technique Evaluation of Potential Dredged Material Disposal Sites in Puget Sound. Phase 2 Sites |
DEC 87 |
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| Authors:
Douglas G. Clarke; David Kendall; CORPS OF ENGINEERS SEATTLE WA SEATTLE DISTRICT
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| The U.S. Army Engineer District, Seattle is currently involved in a decision making process regarding the designation of open water dredged material disposal sites in Puget Sound and adjacent waters. In 1985 a joint effort was initiated to examine long term requirements and strategies for open-water disposal of dredged materials. The quality of benthic habitats at proposed disposal sites was identified as a major topic of interest in the PSDDA ... |
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| Benthic Resources Assessment Technique Evaluation of Disposal Sites in Puget Sound and Adjacent Waters |
DEC 86 |
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| Authors:
Douglas G. Clarke; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
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| This evaluation, based on samples taken in June and July, 1986 at 4 study areas (Commencement Bay, Elliott Bay, Port Gardner, and Saratoga Passage), provides comparative assessments of benthic habitat quality at the study areas in terms of potential trophic support for bottom-feeding fishes. The results of this study are particularly relevant to use of the proposed sites by Dover and English soles. Study findings include: 1) Taxonomic composition (at ... |
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