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Author: Marden B. Boyd Publisher: ISBN: Category : Dredging Languages : en Pages : 168
Book Description
The report presents an assessment of the dredge spoil disposal problem and outlines a research program designed to provide needed information concerning current and potential spoil disposal practices. The report format is intended to reflect the two basic objectives of the report. Section A is directed toward management level review and presents (a) pertinent background information concerning the dredge spoil disposal problem and the current study, (b) conclusions and recommendations resulting from the problem assessment phase of the study, and (c) an outline of the recommended research program. Section B provides an objective assessment of the nationwide problem in sufficient detail to permit meaningful technical review by other interested personnel within and outside the Corps. Section C has been included to show a total-problem organizational structure which is being used to guide the development of the detailed research plan.
Author: Marden B. Boyd Publisher: ISBN: Category : Dredging Languages : en Pages : 168
Book Description
The report presents an assessment of the dredge spoil disposal problem and outlines a research program designed to provide needed information concerning current and potential spoil disposal practices. The report format is intended to reflect the two basic objectives of the report. Section A is directed toward management level review and presents (a) pertinent background information concerning the dredge spoil disposal problem and the current study, (b) conclusions and recommendations resulting from the problem assessment phase of the study, and (c) an outline of the recommended research program. Section B provides an objective assessment of the nationwide problem in sufficient detail to permit meaningful technical review by other interested personnel within and outside the Corps. Section C has been included to show a total-problem organizational structure which is being used to guide the development of the detailed research plan.
Author: James Walter Morton Publisher: ISBN: Category : Dredging Languages : en Pages : 44
Book Description
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.
Author: NATIONAL MARINE FISHERIES SERVICE HIGHLANDS N J MIDDLE ATLANTIC COASTAL FISHERIES CENTER. Publisher: ISBN: Category : Languages : en Pages : 119
Book Description
The report considers the activities and findings of the several integrated research projects designed to monitor the environmental effects of dredging in the Thames River and dredge spoil disposal at the New London Dumping Ground. Surveying of dredging impacts on suspeded materials in the Thames River has been completed by UCONN. The data confirm earlier indications that effects are limited to within 150 m of the dredge. A model of the river's flow characteristics has been selected and is in the the testing phase. (Three predredging surveys were conducted to determine baseline temperature, salinity, suspended solids and light transmission characteristics of the lower Thames River. These data were also used, in conjunction with historical information, to estimate predredging circulation of the lower river.) Mercury in river water was lower in February and April 1975 than during earlier periods, perhaps due to the removal by dredging of contaminated sediments. The report indicates large decreases, apparently due to natural seasonality, in benthic macrofaunal densities throughout the study area between predisposal and April 1975 collections. Predisposal water and sediment samples from 44 stations have been analyzed for fecal coliform and other bacteria. Highest fecal coliform counts were found in the river. Coliform counts were higher at disposal area stations on an ebb than on a flood tide, indicating that the Thames River outflow can have an effect on water quality within the designated disposal area.
Author: P. Lane and Associates Publisher: ISBN: Category : Bridges Languages : en Pages : 9
Book Description
"Dredging of bottom sediments and glacial till for bridge siting and maintenance of navigable waterways destroys benthic fauna and their habitats, and inevitably resuspends some fine particulate matter .... Provided the sediments are not grossly contaminated with heavy metals or organic pollutants, environmental impacts of dredging and spoil disposal are believed to be localized and short-term in nature. Most pollutants are associated with fine-grain, organic particles that settle very slowly. Depending upon the physical oceanographic regime, the various contaminants in dredged fines can be transported long distances. Accumulations well above "background" concentrations are usually restricted to semi-enclosed basins and other poorly-mixed areas, i.e. sites with muddy sediments. Sediments in many industrialized harbours have such high levels of contaminants that governments often prohibit or restrict their disposal. A brief review of the Canadian Government regulations pertaining to ocean disposal of waste materials immediately follows these introductory paragraphs (Section 2). The proposed bridge would involve a maximum dredging volume of 300,000 m3 if the foundations are taken to bedrock .... Depending on the foundation type selected by the developer the actual dredging value could be considerably less than this. While this may suggest the possibility of high risks from pollutant concentrations, most of the fines are contained in glacial till beneath a shallow veneer of surface sediments .... Surficial sediments, where present, are composed primarily of sands and gravel ... and are unlikely to contain large quantities of anthropogenic contaminants. High current activity in the Strait frequently shifts these deposits about and negates any appreciable accumulation of fine, pollutant-rich particles. Some of these particles are invariably buried with larger particles in sand and gravel ripples, but are periodically released back to the water column by natural processes. In order to assess whether dredging activities and spill disposal will pose any high-level risks to biota in Northumberland Strait, a review and appraisal of existing chemical data from the proposed fixed-link corridor, as well as surrounding waters, was carried out. Much of this data has been summarized here, and compared with existing Canadian Government standards or background concentrations normally found in Atlantic Canada (Section 3)"--Pages 2-3.
Author: James Spencer Publisher: ISBN: Category : Coastal zone management Languages : en Pages : 62
Book Description
...Covers methods of dredging and spoil disposal; environmental effects, regulatory process necessary to conduct dredging operations in MA and recommendations for improvement; includes locations of dumping areas...
Author: Marden B. Boyd
Author: Marden B. Boyd
Author: James Walter Morton
Author: Washington (State). Department of Ecology
Author: James Walter Morton
Author: NATIONAL MARINE FISHERIES SERVICE HIGHLANDS N J MIDDLE ATLANTIC COASTAL FISHERIES CENTER.
Author: 
Author: P. Lane and Associates
Author: James Spencer
Author: 
Author: U.S. Fish and Wildlife Service