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Book The Challenges of Dam Removal and River Restoration

Download or read book The Challenges of Dam Removal and River Restoration written by Jerome V. DeGraff and published by Geological Society of America. This book was released on 2013-02-01 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: "River restoration is a societal goal in the United States. This collection of research articles focuses on our current understanding of the impacts of removing dams and the role of dam removal in the larger context of river restoration. The papers are grouped by topic: (1) assessment of existing dams, strategies to determine impounded legacy sediments, and evaluating whether or not to remove the dam; (2) case studies of the hydrologic, sediment, and ecosystem impacts of recent dam removals; (3) assessment of river restoration by modifying flows or removing dams; and (4) the concept of river restoration in the context of historical changes in river systems"--Provided by publisher.

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1981 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effects of Environmental Factors Physical Barriers and Season on the Fish Community Composition of the Lower Ottawa and Mississippi River Systems as Determined from Quantitative Electrofishing

Download or read book Effects of Environmental Factors Physical Barriers and Season on the Fish Community Composition of the Lower Ottawa and Mississippi River Systems as Determined from Quantitative Electrofishing written by Andrew G. Lowles and published by . This book was released on 2013 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental and physical conditions are considered primary drivers of fish community assemblages. The anthropogenic alteration of aquatic ecosystems is implicated as a primary threat to fisheries worldwide. In riverine ecosystems, river-wide barriers may alter natural fluvial processes and hinder fish movement through the system. In this study, I use data collected from two successive years (2008 and 2009) of intensive quantitative electrofishing Casselman and Marcogliese (2008, 2009) performed in different seasons (late fall and late summer) on the lower Ottawa and Mississippi River systems, Ontario, to investigate the effects of sampling season, distance from the river mouth, water temperature, conductivity, rank of velocity and dams on fish abundance, species richness and the Shannon-Weiner Index (SWI) as a measure of species diversity. Sampling in late summer, compared with late fall, resulted in greater species richness and diversity. Colder water temperature affected community composition, and species richness decreased upstream, while diversity did not change. In both seasons, the distance from the river mouth influenced fish community composition, whereas dams appeared to have no effect. This suggests that the continuous gradient model of the River Continuum Concept (RCC) would be applicable in these fragmented systems, which are not heavily altered by fractionation. To effectively manage cost and accuracy when collecting fish community data in large rivers, it is essential to sample strategically during seasons likely to maximize diversity and richness. Sampling intensively during warm water months in various river reaches would likely provide the most complete representation of fish assemblage.

Book Impacts of Waterpower Management on Select Fish in the Ottawa River Canada with an Emphasis on Lake Sturgeon

Download or read book Impacts of Waterpower Management on Select Fish in the Ottawa River Canada with an Emphasis on Lake Sturgeon written by Tim Haxton and published by . This book was released on 2007 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effects of Channelization and Migitation on the Fish Community and Population Structure in the Olentangy River Ohio

Download or read book The Effects of Channelization and Migitation on the Fish Community and Population Structure in the Olentangy River Ohio written by Clayton James Edwards and published by . This book was released on 1977 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Dam Removal in the Ottawa River Ohio

Download or read book Dam Removal in the Ottawa River Ohio written by Johan F. Gottgens and published by . This book was released on 2004 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1981 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monitoring Fish community Contaminant Body Burdens Following Lowhead Dam Removal in an Urban River System

Download or read book Monitoring Fish community Contaminant Body Burdens Following Lowhead Dam Removal in an Urban River System written by Robert Paul Davis and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent increases in lowhead dam removals have prompted research on ecological and geomorphic river responses, yet contaminant dynamics following dam removals are poorly understood. We investigated changes in sediment concentrations and fish-community body burdens of mercury (Hg), selenium (Se), polychlorinated biphenyls (PCB), and chlorinated pesticides before and after two lowhead dam removals in the Scioto and Olentangy Rivers (Columbus, Ohio). We related these changes to documented shifts in fish food-web structure. We surveyed seven study reaches that included two controls, upstream and downstream (of previous dams), and restored vs. unrestored upstream reaches. For most contaminants, fish-community body burdens declined following dam removal and converged across study reaches by the last year of the study in both rivers. Aldrin and dieldrin body burdens in the Olentangy River declined more rapidly in the upstream-restored vs. the upstream-unrestored reach, but were indistinguishable by year three. No upstream-downstream differences were observed in body burdens in the Olentangy River, but aldrin and dieldrin body burdens were 138 and 148 % higher, respectively, in downstream reaches than in upstream reaches of the Scioto River following dam removal. The strongest relationships between trophic position and body burdens were observed with PCBs and Se in the Scioto River, and with dieldrin in the Olentangy River. Food-chain length – a key measure of trophic structure – was only weakly related to aldrin body burdens, and unrelated to other contaminants. Overall, we demonstrate that lowhead dam removal may effectively reduce ecosystem contamination. This study presents some of the first findings documenting ecosystem contamination following dam removal and will be useful in informing future dam removals.

Book The Ottawa River Toledo Ohio

Download or read book The Ottawa River Toledo Ohio written by Maumee RAP Ottawa River Action Group and published by . This book was released on 2000 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Ohio River Access Study

Download or read book Ohio River Access Study written by Ohio. Department of Natural Resources and published by . This book was released on 1986 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Aquatic and Terrestrial Communities on the Lower Ohio River RM 930 981

Download or read book Aquatic and Terrestrial Communities on the Lower Ohio River RM 930 981 written by Stuart E. Neff and published by . This book was released on 1981 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lower 60 miles of the Ohio River seems to be a relatively undisturbed segment of this large river. Together with its natural flood-plain' lakes it supports a rather diverse fauna and flora which would be affected by proposed navigation projects in the area. Of the three basic alternative plans the rehabilitation of existing locks and dams 52 and 53 would have the least impact on the aquatic biota. Replacement of the two smaller dams with a single large dam would result in the destruction of some gravel substrates valuable to mussel communities and fishes, and would permanently connect one slough with the river. This permanent connection would result in a replacement of the unique slough biota with the typical riverine biota. The third alternative, removal of the two small dams and maintenance of open river conditions through construction of wing dikes and channel dredging, would have the most serious detrimental impact on aquatic life. These effects would result from sedimentation of existing gravel and sand deposits which are valuable areas for maintaining benthic invertebrates and fishes.

Book Aquatic Life Resources of the Ohio River

Download or read book Aquatic Life Resources of the Ohio River written by Ohio River Valley Water Sanitation Com and published by . This book was released on 2013-06-07 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Inventory And Evaluation Of Fish Populations, Limnological Conditions, Commercial Fishing, And Sport Fishing, With Historical Notes. Additional Contributors Include Louis A. Krumholz, James R. Charles, W. L. Minckley, And Others.