Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Dynamics of mixing and dispersal written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1976 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Volume 4 Dynamics of Mixing and Dispersal written by J. Philip Keillor and published by . This book was released on 1976 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two areas selected for study, the north coast of the Keweenaw Peninsula and the western embayment of Lake Superior near Duluth-Superior, differ greatly in their mixing and dispersal characteristics. Nearshore turbidity along the Keweenaw Peninsula contrasts to relatively large turbid eddies off of Duluth-Superior. Turbidity along the north coast of the Keweenaw Peninsula is frequently confined to an even narrower coastal area later in the summer which is under the influence of the strong, well-defined coastal current. Flowing northeast along the north shore of the Keweenaw Peninsula during the summer months, the Keweenaw current follows the coast at speeds ranging from 40 to 90 cm/sec. (Yeske, 1973). Although sometimes narrower, the Keweenaw current normally ranges in width from five to ten kilometers. The surface thermal structure of this current indicates the presence of eddies, meanders, and counter-currents (Ragotzkie, 1966; Smith, 1972). Other studies of the Keweenaw Current structure include Ragotzkie and Bratnik (1965), Smith and Ragotzkie (1970) and Yeske, et. al. (1972).
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Summary report written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1976 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1976 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report written by John J. Magnuson and published by . This book was released on 1976 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior written by and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Biological studies written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1976 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Sedimentation studies written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1976 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Trace element study written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1976 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior written by University of Wisconsin--Madison. Institute for Environmental Studies. Marine Studies Center and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Volume 2 Sedimentation Studies Duluth Superior and Keweenaw Study Areas written by Jay Van Tassell and published by . This book was released on 1976 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a sedimentation study, forming part of an assessment of environmental impacts associated with in-lake disposal of dredge spoil on Lake Superior. This assessment was requested by the St. Paul District Office of the US Corps of Engineers and funded under contract number DACW37-74-C-0013 to the University of Wisconsin-Madison in August, 1973. Field and laboratory studies focused on two locations where a substantial amount of dredging is done annually: Duluth-Superior and the Keweenaw Waterway.
Download or read book Draft Report an Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior written by University of Wisconsin--Madison. Marine Studies Center and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior written by J. Philip Keillor and published by . This book was released on 1976 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is an assessment of environmental impacts associated with in-lake disposal of dredged material in Lake Superior. This assessment was requested by the St. Paul District, U.S. Army Corps of Engineers. Authorization for such environmental assessment studies is contained in the National Environmental Policy Act of 1969 (Public Law 91-190). Environmental impact statements (EIS) have been prepared by the Corps of Engineers of Lake Superior harbors requiring maintenance at a level which may have a significant effect on the environment. Lake Superior harbors maintained by the Corps of Engineers are shown. Statements for a few of these harbors (Keweenaw Waterway, Grand Traverse Bay, Big Bay Harbor, Cornucopia and Port Wing) included some data from lake sediment samples. But none of the EIS contained enough information to assess the effects of in-lake dredged material disposal.
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Volume 3 Biological Studies Duluth Superior and Keweenaw Study Areas written by John J. Magnuson and published by . This book was released on 1976 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was funded by the Corps of Engineers to study effects of in-lake dredge spoil disposal on toxicity and availability of heavy metals to the biota of Lake Superior. Attention was focused on the benthic organisms in direct contact with the sediment. In the laboratory sublethal bioassays were used to examine effects of mercury and zinc contaminated sediments on the burrowing scud, Pontoporeia affinis. This amphipod is the predominant benthic invertebrate in Lake Superior and a major food base for Lake Superior fishes. Changes were observed in locomotor activity of Pontoporeia as a measure of their health on sediments with and without added mercury and zinc, and whole body concentrations of these metals were measured in Pontoporeia after exposure to the enriched sediments for periods of two days to two weeks. The benthic communities near Duluth-Superior were surveyed and maps showing distribution and abundance of organisms were prepared. Samples were collected for background levels of various elements in sediments, invertebrates, and fish in Lake Superior. Shorebird populations were surveyed at Duluth-Superior and the Keweenaw Peninsula. The authors also worked with scientists at Michigan Technological University to obtain similar information for the Corps of Engineers at the Keweenaw Waterway and adjacent Lake Superior.
Download or read book Final Report written by John J. Magnuson and published by . This book was released on 1976 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior Volume 5 Trace Element Study Duluth Superior and Keweenaw Study Areas written by Philip A. Helmke and published by . This book was released on 1976 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Present procedures for evaluation of harbor sediments do not provide sufficient information to adequately assess alternatives for the disposal of dredged material. This is especially true for trace element evaluations. The elutriate test described later (also see Lee and Plumb, 1974) has been recently developed primarily to identify potential problems of water quality, although some information about sediment quality is also obtained. Existing knowledge of the relationship of trace elements in sediments to trace elements in organisms is too scarce to allow information from the elutriate test to predict the effect of dredged materials on the trace element concentrations in benthic organisms. The purpose of this part of the study is to develop a procedure to accurately assess the extent of trace element pollution of sediments. Such a procedure must provide information about sediment quality which supplements the results provided by the elutriate test. The information provided by this procedure, along with the concentrations of trace elements in organisms and the results of the bioassay experiment, is used to determine permissible concentrations of trace elements in sediments.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
