Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix F Recolonization of Benthic Macofauna Over a Deep Water Disposal Site written by Robert A. Harman and published by . This book was released on 1978 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal monitoring of benthic macrofauna and fish stomach contents was conducted over a deep (64 m) experimental disposal site in the Duwamish River-influenced portion of Elliott Bay, Puget Sound, Washington. Triplicate samples were collected during a 9-month sampling period within the disposal site and at four reference stations, two from the greater (east side) and two from the lesser (west side) river-influenced portions of the bay. The areal extent of the disposed dredged material was discernible from the changes in sediment composition was well as changes in biomass density and species composition of the benthic community. During the 9-month postdisposal sampling period recovery was not complete. Three recolonizing phases were recognized in the succession of the benthic fauna. Phase I was characterized by the immediate recolonization by fish and shrimp, migration of predisposal occupants to the surface of the deposit, and migration of species into the disposal area from adjacent habitats. Phase II was represented by a summer recruitment period of opportunistic species and annuals onto the disposal site, and Phase III was distinguished by an increase in predatory worms and subsequent decline in opportunistic species. The last phase of the succession was not observed. Recovery of many of the nonbenefited annuals and climax species was not observed during the 9-month sampling period.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by Robert A. Harman and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by C. Rex Bingham and published by . This book was released on 1978 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by Fuad M. Teeny and published by . This book was released on 1977 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by Susan Frances Sugai and published by . This book was released on 1978 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix G Benthic Community Structural Changes Resulting from Dredged Material Disposal Elliott Bay Disposal Site written by and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic community changes resulting from the open-water disposal of 114,350 cum of Duwamish River dredged material at the Elliott Bay, Puget Sound, deep-water (approximately 60 m) experimental disposal site, 7 February 1976 to 6 March 1976, were investigated. Analyses were performed on macrofaunal density, species composition, biomass, biomass/individual, frequency of occurrence, and species diversity, at several taxonomic levels for one predisposal sampling and five postdisposal samplings at 10 days, and 1, 3, 6 and 9 months after disposal. These analyses were performed on data from stratified (central, side, and corner) disposal site stations and two (east and west) reference sites. Taxonomic levels investigated were total benthic macrofauna, macrofaunal groups (gastropods, pelecypods, errantian worms, sedentarian worms, and miscellaneous species), and individual species. Most individual species showed seasonal trends (both graphically and statistically) at the reference sites and the corner disposal site stations, indicating that rate of benthic macrofaunal recovery from dredged material disposal may be affected by seasonal parameters. Therefore, timing of dredged material disposal on similar sites may be important in reducing the severity of impact on the benthic macrofauna.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by C. Rex Bingham and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic community changes resulting from the open-water disposal of 114,350 cum of Duwamish River dredged material at the Elliott Bay, Puget Sound, deep-water (approximately 60 m) experimental disposal site, 7 February 1976 to 6 March 1976, were investigated. Analyses were performed on macrofaunal density, species composition, biomass, biomass/individual, frequency of occurrence, and species diversity, at several taxonomic levels for one predisposal sampling and five postdisposal samplings at 10 days, and 1, 3, 6 and 9 months after disposal. These analyses were performed on data from stratified (central, side, and corner) disposal site stations and two (east and west) reference sites. Taxonomic levels investigated were total benthic macrofauna, macrofaunal groups (gastropods, pelecypods, errantian worms, sedentarian worms, and miscellaneous species), and individual species. Most individual species showed seasonal trends (both graphically and statistically) at the reference sites and the corner disposal site stations, indicating that rate of benthic macrofaunal recovery from dredged material disposal may be affected by seasonal parameters. Therefore, timing of dredged material disposal on similar sites may be important in reducing the severity of impact on the benthic macrofauna.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by Henry E. Tatem and published by . This book was released on 1978 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multidisciplinary approach was utilized to study the physical, chemical, and biological effects of disposal of contaminated dredged material from the Duwamish River on a deepwater disposal site located in Elliott Bay, Puget Sound, Wash. A pilot survey, conducted in November and December 1975, was followed by a full-scale field assessment program. Observation of individual disposal events indicated that the sediment left the split-hull barges as a well-defined slug and reached the bottom in approximately 25 sec. A mound of dredged material 2.2 m high was created near the center of the disposal site. There was no physical of chemical evidence which indicated that any of the material reached the two reference sites located east and west of the disposal site. Chemical analyses of the in situ river sediment revealed concentrations of total sulfides and PCB's and interstitial water ammonia significantly higher than those for sediments from the disposal or reference sites. Chemical analyses of animal tissues collected at the disposal and reference sites indicated that the disposal operation did not result in higher levels of mercury and chromium in test animals. Mussels held at the disposal site for 3 weeks did accumulate PCB's to some extent; however, background levels of PCB's in Elliott Bay waters were found to be relatively high before the operation. No adverse effects on demersal fish or shellfish were demonstrated.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix A Effects of Dredged Material Disposal on Demersal Fish and Shellfish in Elliott Bay Seattle Washington written by and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cooperative research program, sponsored by the Office, Chief of Engineers, U.S. Army, was conducted in Elliott Bay near Seattle, Wash., to determine the effects of disposal of dredged material from the Duwamish Waterway in open water. The study involved several agencies, both public and private, investigating various aspects of the disposal operation. The research described in this report was conducted by the National Marine Fisheries Service of the National Oceanic and Atmospheric Administration to determine the effects of dredged material disposal on demersal fish and shellfish at the disposal site. It was concluded that the quantity of dredged material dumped during the study did not have a lasting detrimental effect on the demersal fish and shellfish populations at the disposal site. The investigators recommend (a) that any future study include a longer period of time for collecting baseline data, (b) that the characteristics of the reference sites be more comparable to those of the disposal site, and (c) that the disposal operations be conducted in a manner similar to that which is used in actual practice so the results might have general application.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix A Effects of Dredged Material Disposal on Demersal Fish and Shellfish in Elliott Bay Seattle Washington written by and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cooperative research program, sponsored by the Office, Chief of Engineers, U.S. Army, was conducted in Elliott Bay near Seattle, Wash., to determine the effects of disposal of dredged material from the Duwamish Waterway in open water. The study involved several agencies, both public and private, investigating various aspects of the disposal operation. The research described in this report was conducted by the National Marine Fisheries Service of the National Oceanic and Atmospheric Administration to determine the effects of dredged material disposal on demersal fish and shellfish at the disposal site. It was concluded that the quantity of dredged material dumped during the study did not have a lasting detrimental effect on the demersal fish and shellfish populations at the disposal site. The investigators recommend (a) that any future study include a longer period of time for collecting baseline data, (b) that the characteristics of the reference sites be more comparable to those of the disposal site, and (c) that the disposal operations be conducted in a manner similar to that which is used in actual practice so the results might have general application.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by D. J. Baumgartner and published by . This book was released on 1978 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix D Chemical and Physical Analyses of Water and Sediment in Relation to Disposal of Dredged Material in Elliott Bay Volume I February June 1976 written by D. J. Baumgartner and published by . This book was released on 1978 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted on the chemical and physical effects of open-water disposal of dredged material from the Duwamish River into Elliott Bay, Washington. The water column at the disposal and reference sites was monitored during and after the dredged material disposal operation for suspended solids, pH, nutrients (NH3-N, NO2 + NO3 and O PO4-P), and dissolved heavy metals (Hg, As, Cr and Mn). The river sediments were evaluated for particle size distribution, Eh, organic C, sulfides, nutrients (NH3-N, NO2 + NO3 and O PO4-P), and bulk and interstitial heavy metals (Hg, As, Cr and Mn) prior to dredging. The river sediments which were dumped at the experimental bay site were heterogeneous in their physical and chemical character although on the average NH3-N, alkaline soluble sulfide and total Hg were several times higher than the bay sediments. During the disposal operation near bottom water column concentrations of d-Mn, suspended solids and NH3-N were elevated for a short time (generally minutes) at the disposal site. No chemical differences were observed between the water column at the disposal site and reference sites during the sampling at 1 week, 1 month and 3 months after the termination of the disposal operation.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix C Effects of Dredged Material Disposal on the Concentration of Mercury and Chromium in Several Species of Marine Animals written by Fuad M. Teeny and published by . This book was released on 1977 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specimens of five species of marine organisms indigenous to Puget Sound were collected over a period of nine months for mercury and chromium analysis. The specimens were collected from two environmentally similar sites in Elliott Bay, the disposal site for 'polluted' dredged material from the Duwamish Waterway and a reference or control site. Mercury and chromium concentrations in English sole (Parophrys vetulus), Alaska and Oregon pink shrimp (Pandalus borealis and P. jordani), spot shrimp (Pandalus platyceros), sea cucumber (Parastichopus californicus), and mussel (Mytilus edulis) were not significantly different between the two sites. In all samples, the levels of mercury and chromium were low and did not exceed 0.10 ppm for mercury and 0.91 ppm for chromium. These data suggest that the disposal operation had not apparent effect upon the mercury and chromium concentrations in the five species of organisms studied. (Author).
Download or read book A Catalog of Biological Effects Measurements Along the Pacific Coast written by Alice B. Benedict and published by . This book was released on 1987 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Draft Feasibility Report and Draft Environmental Impact Statement East West and Duwamish Waterways Navigation Improvement Study written by and published by . This book was released on 1983 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix D Chemical and Physical Analyses of Water and Sediment in Relation to Disposal of Dredged Material in Elliott Bay Volume II September December 1976 written by S. Sugai and published by . This book was released on 1978 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents results obtained in a study conducted to evaluate the extent and duration of changes in chemical characteristics of Elliott Bay, Washington, six and nine months after disposal of dredged materials from the Duwamish River. The seawater, sediment, and interstitial water were analyzed for the following chemical parameters: (1) Seawater--Suspended solids, arsenic, manganese, mercury, reactive silicate, inorganic phosphate, nitrate, and ammonia; (2) Sediment--Free and total (acid soluble) sulfide, manganese, chromium, arsenic, mercury, and particle size; and (3) Interstitial water--Arsenic, manganese, reactive silicate, ammonia, and inorganic phosphate. Temporal, depth, and spatial changes in concentrations of chemical variables were evaluated at disposal and reference sites. The results of analyses showed only minimal changes in trace metal concentrations in the water column above the disposal site, but lower Eh and pH values in the sediments than at the reference site. The manganese, inorganic phosphate, and ammonia concentration values were greater in interstitial waters at the disposal site than at the reference site. (Author).
Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1980 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
