Effects Of Dredging And Disposal On Aquatic Organisms

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Effects of Dredging and Disposal on Aquatic Organisms

Nina D. Hirsch,Louis H. DiSalvo,Richard Peddicord,Richard K. Peddicord
Effects of Dredging and Disposal on Aquatic Organisms Book PDF

Author : Nina D. Hirsch,Louis H. DiSalvo,Richard Peddicord,Richard K. Peddicord
Publisher : Unknown
Page : 52 pages
File Size : 48,8 Mb
Release : 1978
Category : Dredging
ISBN : UCR:31210024936518

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Effects of Dredging and Disposal on Aquatic Organisms by Nina D. Hirsch,Louis H. DiSalvo,Richard Peddicord,Richard K. Peddicord Pdf

This report synthesizes data from the U.S. Army Corps of Engineers' Dredged Material Research Program, Task 1D. Task 1D consisted of six research projects (work units) that investigated the direct and indirect effects of dredging and disposal of dredged material on aquatic organisms. Determination of potential environmental effects of dredging and disposal, in spite of research conducted to date, is still in preliminary stages due to the multiplicity of variables involved. Bioavailability of sediment-sorbed heavy metals is low. Release of sediment-associated heavy metals and their uptake into organism tissues have been found to be the exception rather than the rule. Research results suggest that there is little or no correlation between the bulk sediment content of heavy metals and environmental impact. Oil and grease residues, like the heavy metals, seem tightly bound to sediment particles and accumulation of these residues by organisms is minimal. The diversity of variables that have the potential for direct and indirect effects on acquatic life argues for an integrated, whole-sediment bioassay, using sensitive test organisms. Such a procedure is currently under development by the Environmental Protection Agency and the Corps of Engineers and should uncover site-specific toxicity problems which can be addressed by appropriate chemical testing and biological evaluation of dredged material.

Water Quality Impacts of Aquatic Dredged Material Disposal (laboratory Investigations)

Sterling A. Burks,Robert M. Engler
Water Quality Impacts of Aquatic Dredged Material Disposal laboratory Investigations Book PDF

Author : Sterling A. Burks,Robert M. Engler
Publisher : Unknown
Page : 54 pages
File Size : 43,7 Mb
Release : 1978
Category : Aquatic ecology
ISBN : UOM:39015095028059

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Water Quality Impacts of Aquatic Dredged Material Disposal (laboratory Investigations) by Sterling A. Burks,Robert M. Engler Pdf

Natural processes in aquatic ecosystmes tend to concentrate heavy metals, chlorinated hydrocarbons, pesticides, nutrients, and oil and grease compounds in bottom sediments. These contaminants are not very soluble in water under the conidtions that normally occur in oxygenated uncontaminated surface waters. Therefore, introducing high concentrations of these contaminants into aquatic ecosystems will generally result in an equilibrium condition where most of the contaminant will be sorbed (adsorbed and absorbed) by suspended particulate material and then deposited on the bottom when the suspended material settles. The time necessary to achieve the equilibrium condition depends upon the physicochemical conditions in the aquatic system and the quantity and duration of the contaminant introduction. Dredged Material Research Program (DMRP) reports and other literature indicate that dredging operations have the potential to temporarily mobilize or release some contaminants from the sediments. During disposal operations, the anaerobic sediments are mixed with aerated surface water, and a complex chemical interaction occurs. Heavy metals, such as cadmium, copper, chromium, lead, and zinc, are stabilized in the oxygen-free sediments as insoluble sulfides.

Ecological Effects of Dredging and Dredge Spoil Disposal

James Walter Morton
Ecological Effects of Dredging and Dredge Spoil Disposal Book PDF

Author : James Walter Morton
Publisher : Unknown
Page : 44 pages
File Size : 48,6 Mb
Release : 1977
Category : Dredging
ISBN : UOM:39015086512640

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Ecological Effects of Dredging and Dredge Spoil Disposal by James Walter Morton Pdf

The goal of this study was to prepare a comprehensive review of the literature on the physical, chemical, and biological effects of dredging and spoil disposal in estuaries and to identify alternative spoil disposal methods. Specific objectives were to identify the most critical problems relating to dredging and spoil disposal and to summarize the progress made to date in solving these problems. Using literature search facilities, bibliographies, and communications with experts throughout the United States, about 520 scientific and technical articles on dredging and spoil disposal were screened. Information extracted from selected articles is included in this review.

Impacts of Navigational Dredging on Fish and Wildlife

Kenneth O. Allen,Joe Wayne Hardy
Impacts of Navigational Dredging on Fish and Wildlife Book PDF

Author : Kenneth O. Allen,Joe Wayne Hardy
Publisher : Unknown
Page : 98 pages
File Size : 43,6 Mb
Release : 1980
Category : Dredges
ISBN : UOM:39015086412528

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Impacts of Navigational Dredging on Fish and Wildlife by Kenneth O. Allen,Joe Wayne Hardy Pdf

Aquatic Dredged Material Disposal Impacts

Thomas D. Wright
Aquatic Dredged Material Disposal Impacts Book PDF

Author : Thomas D. Wright
Publisher : Unknown
Page : 66 pages
File Size : 47,8 Mb
Release : 1978
Category : Aquatic ecology
ISBN : UCR:31210024931592

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Aquatic Dredged Material Disposal Impacts by Thomas D. Wright Pdf

Under the Dredged Material Research Program (DMRP), studies of the impact of dredged material disposal in open-water systems (Aquatic Disposal Field Investigations (ADFI)) were conducted at five locations: New York (Eatons Neck), Ohio (Ashtabula River), Texas (Galveston), Oregon (Columbia River), and Washington (Duwamish Waterway). The sites were representative of a variety of disposal practices, dredged materials, and aquatic habitats. Disposal did not occur during the course of the Eatons Neck ADFI but did at the other four sites. This report summarizes the findings of the investigations.

Effects of Turbidity and Suspended Material in Aquatic Environments

Edward M. Stern,William B. Stickle
Effects of Turbidity and Suspended Material in Aquatic Environments Book PDF

Author : Edward M. Stern,William B. Stickle
Publisher : Unknown
Page : 128 pages
File Size : 50,7 Mb
Release : 1978
Category : Turbidity
ISBN : UIUC:30112110774574

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Effects of Turbidity and Suspended Material in Aquatic Environments by Edward M. Stern,William B. Stickle Pdf

This literature review of the effects of turbidity and suspended material in aquatic environments covers the following subjects: definitions, units of measure, and methods of measurement; origins; and effects in aquatic environments. Turbidity, regardless of the multiplicity of definitions, units of measure, and methods of measurement, is an expression of the optical properties of water that cause light to be scattered and absorbed rather than transmitted in a straight line. Turbidity is not the same as siltation, although the terms have been used synonymously in the past. The various units of measure include the Jackson Turbidity UNIT (JTU), Formazin Turbidity Unit (FTU), and Nephelometric Turbidity Unit (NTU). The methods of measuring percent transmission or the weight per volume concentration of suspended particulates are based on either gravimetric or optical techniques.

Fish Habitat and Dredging

Canada. Department of Fisheries and Oceans
Fish Habitat and Dredging Book PDF

Author : Canada. Department of Fisheries and Oceans
Publisher : Fisheries and Oceans
Page : 12 pages
File Size : 55,7 Mb
Release : 1985
Category : Dredging
ISBN : UCBK:C087001326

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Fish Habitat and Dredging by Canada. Department of Fisheries and Oceans Pdf

This bulletin reviews the rationale for dredging, the types of dredging (mechanical & hydraulic), and the impacts of dredging on fish & fish habitat. These include physical effects such as burial by dredge spoil and chemical effects from the release of contaminants. The final sections discuss safeguards to reduce the negative effects of dredging & dumping operations as well as the role of Fisheries & Oceans Canada in protecting fish & fish habitat.

Ecological Research Series

Anonim
Ecological Research Series Book PDF

Author : Anonim
Publisher : Unknown
Page : 322 pages
File Size : 40,5 Mb
Release : 1978
Category : Ecology
ISBN : OSU:32435020492989

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Ecological Research Series by Anonim Pdf

Effect of Dredging on Estuarine Environments

Philip N. Badenhorst
Effect of Dredging on Estuarine Environments Book PDF

Author : Philip N. Badenhorst
Publisher : Unknown
Page : 44 pages
File Size : 51,5 Mb
Release : 1986
Category : Dredging
ISBN : MSU:31293005470293

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Effect of Dredging on Estuarine Environments by Philip N. Badenhorst Pdf

Dredging America's Waterways and Harbors

United States. General Accounting Office
Dredging America s Waterways and Harbors Book PDF

Author : United States. General Accounting Office
Publisher : Unknown
Page : 78 pages
File Size : 40,6 Mb
Release : 1977
Category : Dredging
ISBN : STANFORD:36105126837728

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Dredging America's Waterways and Harbors by United States. General Accounting Office Pdf

Environmental Aspects of Dredging

R. N. Bray
Environmental Aspects of Dredging Book PDF

Author : R. N. Bray
Publisher : CRC Press
Page : 398 pages
File Size : 42,5 Mb
Release : 2008-03-10
Category : Technology & Engineering
ISBN : 9780203894897

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Environmental Aspects of Dredging by R. N. Bray Pdf

Expanding a port, deepening a navigation channel or creating new land for development, introduces changes to our physical, social, economic and political environment. Changes may result from events during the construction process, or relate to the nature of the completed structure. Changes can be positive or negative, short-term or long-term, and may affect the immediate vicinity of the project or a larger geographical area. Predicting and assessing all possible effects of a planned dredging activity in a scientifically-sound and reliable manner is essential, so that appropriate control measures can be taken to avoid or mitigate unwelcome impacts. This book provides guidance for a complete holistic environmental evaluation procedure and for the design and implementation of environmental control measures. The book is of particular interest to engineers, government agencies and port authorities, as well as civil engineering consultants and contractors involved in planning and designing dredging, maritime infrastructure and fluvial projects.