Download or read book Investigation of the Chemical Effects on Water Quality During Resumed Construction of Dike Wall of Dredge Disposal Facility at Cleveland Harbor Ohio Site 12 written by and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Possible Environmental Consequences Associated with Construction of a Confined Dredge Disposal Facility at Cleveland Harbor Ohio Site 12 written by and published by . This book was released on 1974 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Environmental Effects of Bottom Dumping of Cuyahoga River Dredge Spoil Into a Confined Dredge Disposal Facility at Cleveland Harbor Ohio Site 12 written by and published by . This book was released on 1974 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cleveland Harbor Diked Disposal Site No 14 written by and published by . This book was released on 1976 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Quality Impacts of Aquatic Dredged Material Disposal laboratory Investigations written by Sterling A. Burks and published by . This book was released on 1978 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Toledo Harbor Maintenance Dredging written by and published by . This book was released on 1976 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long term Release of Contaminants from Dredged Material written by James M. Brannon and published by . This book was released on 1978 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Man's activities in the Nation's coastal zones and waterways have served to contaminate sediments in these areas, generating concern that dredging and disposal may exert adverse effects on water quality and aquatic organisms. The long-term effects of dredged material on water quality at the disposal site remain an area of particular concern. To study the magnitude and predictability of long-term releases from dredged material, an 8-month aerobic leaching study was conducted in the laboratory. A large number of sediments (32) representing broad geographical and pollutional variation were used to ensure wide applicability of study results. Under the aerobic chemical conditions likely to prevail at aquatic disposal sites, total organic carbon, orthophosphate-P, and zinc exhibited the most consistent net releases to the water column. Very little net mass release of mercury (Hg), lead (Pb), cadmium (Cd), or arsenic (As) into the water column was observed regardless of the composition of the sediments. Worst case evaluation of the potential effects of contaminant releases, conducted by comparing results of this study with the most stringent water quality criteria available, indicated that sediments used in this study would not be expected to cause significant long-term water quality problems.
Download or read book The Effects of Dredging on the Chemical Characteristics of the Grand River written by Brian J. Eadie and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: During spring 1977, water was sampled in the Grand River, which runs through the State of Michigan, to estimate the increased loads of polluting and enriching substances caused by dredging the river channel near its mouth at Lake Michigan. Results indicate that sedimentary material disturbed during the dredging process is carries out to the lake. On an annual basis, the increase in loading is approximately 1 percent for all variables measured; however, during the period of dredging (about 1 week), the increases are approximately 30 percent. The effects of these events on the nearshore ecology are not known at present.
Download or read book Water Quality Impacts of Aquatic Dredged Material Disposal written by United States. Army. Corps of Engineers and published by . This book was released on 1978 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Portland Harbor Dredging and Columbia River In water Disposal Water Quality Investigations written by United States. Army. Corps of Engineers. Portland District and published by . This book was released on 1979 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Dredging on Water Quality of Kewaunee Harbor Wisconsin written by Iskandar Karam Iskandar and published by . This book was released on 1984 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six sediments and four water samples were collected from Kewaunee, Wisconsin, in 1981, prior to dredging of this Lake Michigan harbor. A modified elutrate test was used to estimate potential impact on water quality upon harbor dredging and disposal of the sediments in a confined facility. The modification of the test included a comparison between containment release under aerated vs unaerated conditions and filtered vs unfiltered elutrates. Statistical analysis showed that the differences in the chemical characteristics between the filtered and unfiltered samples were significant for soluble reactive P and all the tested metals except Cu. Significant but low amounts of heavy metals (Cd, Pb, Zn, Ni, Fe, Mn) and soluble reactive P will be released to the water if the effluent is not filtered. Under aerated conditions, COD in both the filtered and unfiltered samples was higher than under unaerated conditions. In contrast, total organic carbon was much higher under the unaerated condition than under aerated conditions. The study concluded that sediment and contaminant releases from the confined disposal facility (CDF) to the harbor water were less than those from the Kewaunee River input. Also, retention of effluent in the CDF for about four days decreased the suspended solids in the effluent to about 40 to 50 mg/L, which is similar to the concentration in the lake water. The use of sand filters should not be for routine operation but rather for emergency cases when there is not enough time for effluent retention in this CDF.
Download or read book Environmental Impact Research Program Ecological Effects of Rubble Mound Breakwater Construction and Channel Dredging at West Harbor Ohio Western Lake Erie written by Bruce A. Manny and published by . This book was released on 1985 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation indicated that breakwater construction and associated channel dredging activities by the US Army Corps of Engineers in western Lake Erie at the entrance to West Harbor (Ohio) had no detectable adverse impacts on the distributions or abundances of macrozoobenthos and fishes. Rather, increases were noted in the number of fish eggs and larvae and in the desnity and biomass of periphyton and macrozoobenthos on and near the breakwaters. The area also served as a nursery ground for 20 species of fishes both during and after construction and dredging activities. Colonization of the breakwaters by periphyton, primarily a green alga (Cladophora glomerata), diatoms (Gomphonema parvulum), and a bluegreen alga (Oscillatoria tenuis), and by macrozoobenthos, primarily worms (Oligochaeta), amphipods (Gammarus spp.), and midge larvae (Chironomidae), was rapid and extensive, indicating that the breakwaters provided new, favorable habitat for primary and secondary producer organisms. Marked adverse changes in water quality, especially reduced dissolved oxygen concentrations (2-5 mg/l), occurred around the entrance to West Harbor in 1983 following cessation of construction and dredging activities. These water quality changes, however, could not be ascribed with certainty to construction and dredging activities at West Harbor. Construction of additional breakwaters in the study at that time by the State of Ohio served to confound determination of the responsible causal factors. (Author).
Download or read book Evaluation of Dredged Material Pollution Potential written by James M. Brannon and published by . This book was released on 1978 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report synthesizes data from the U.S. Army Engineer Waterways Experiment Station, Dredged Material Research Program (DMRP), Task 1E. Task 1E consisted of seven research projects (work units) that investigated the pollution properties of dredged material and procedures for determining their potential for effect on water quality and aquatic organisms. The short-term impact of dredged material on water quality and aquatic organisms is related to the concentration of chemically mobile, readily available contaminants rather than the total concentration. The elutriate Test, which measures concentrations of contaminants released from dredged material, can be used to evaluate short-term impacts on water quality. Longer term impacts of dredged material on water quality have generally been slight and can be evaluated by means of the Elutriate Test and analysis of the mobile forms of sediment contaminants. No significant long-term increase in water column contaminant concentrations has been observed at any aquatic disposal field site. The greatest hazard of dredged material disposal is the potential effect of the material on benthic organisms. Most dredged material has not proven particularly toxic. Some dredged material has not proven particularly toxic. Some dredged material, however, can be extremely toxic or of unknown toxicological character. Benthic bioassay procedures are now available which can identify this toxic dredged material.
Download or read book Water Quality Monitoring at the Norfolk Disposal Site written by Raymond W. Alden and published by . This book was released on 1984 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continual dredging of navigational channels in major seaports is essential to maintain shipping access. However, the disposal of potentially contaminated dredged material raises environmental issues. Current methods for dredged material disposal include: landfill, on shore, and open ocean disposal. Available land for on shore and landfill disposal is often at a premium in the industrialized, urban seaport and may present a variety of social, economic, and ecological problems. Recently, renewed interest has been generated in the feasibility of the open ocean disposal of dredged materials. Currently, dredged materials from the Hampton Road Harbor area are being disposed at the Craney Island containment facility. However, Craney Island has a finite capacity in its current configuration. An open ocean disposal site designated the Norfolk Disposal Site (NDS) is being considered as an alternative for some of the Norfolk Harbor system dredged material. The present ongoing study involves the monitoring of baseline water quality characteristics at the NDS. This study was undertaken to characterize the magnitude of natural spatial-temporal variability of various ecological parameters and to develop a series of multivariate statistical models to be used as an early warning system in historic trend assessment studies. This report presents the results of a three year baseline water quality program at the NDS.
Download or read book Research study on the effect of dispersion settling and resedimentation on migration of chemical constituents during open water disposal of dredged materials written by and published by . This book was released on 1976 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Effects of Dredging Field Verification of the Estuarine Plant Bioassay Procedure written by and published by . This book was released on 1987 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FVP used contaminated sediment dredged from a project in Black Rock Harbor (BRH), Bridgeport, Conn. Use of a single highly contaminated dredged material afforded a unique opportunity to evaluate results of disposal under three different disposal alternatives: open water, intertidal (wetland), and upland. Upland and wetland sites were designed to meet surface area, elevation, and operational requirements for FVP contaminant mobility studies. Designs for sedimentation and storage followed recently developed Corps procedures, and the resulting site performance fulfilled design objectives. Provisions were made to ensure that essentially the same dredged material was placed in the open-water, upland, and wetland sites. The upland and wetland sites, constructed within protected areas using conventional construction techniques, were filled hydraulically from barges. The filling operation provided conditions typical of confined dredged material disposal operations. Following filling, the weirs at both sites were managed to allow free drainage of surface water as the fill stabilized through consolidation. Within approximately 9 months, the upland and wetland substrates had stabilized at the desired surface elevations. JMD.
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:
