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Tuesday, May 5, 2020 | History

2 edition of Environmental effects of dams and impoundments in Canada found in the catalog.

Environmental effects of dams and impoundments in Canada

R. M. Baxter

Environmental effects of dams and impoundments in Canada

experience and prospects

by R. M. Baxter

  • 191 Want to read
  • 10 Currently reading

Published by Dept. of Fisheries and Oceans in Ottawa .
Written in English

    Subjects:
  • Dams -- Environmental aspects -- Canada.

  • Edition Notes

    Bibliography: p. 27-34.

    StatementR. M. Baxter, Pierre Glaude.
    SeriesCanadian bulletin of fisheries and aquatic sciences. Bulletin -- 205., Canadian bulletin of fisheries and aquatic sciences -- bulletin 205.
    ContributionsGlaude, Pierre.
    The Physical Object
    Paginationvi, 34 p. :
    Number of Pages34
    ID Numbers
    Open LibraryOL17638606M

      Ultimate Guide to Hydropower, Hydroelectric Power, Dams, Turbine, Safety, Environmental Impact, Fish Passage, Impoundment, Pumped Storage, Diversion, Run-of-River (Ringbound and CD-ROM) Ring-bound – Novem /5(2).   While the great majority of the world's large dams and all of the major dams have been completed within the last six decades, some of the environmental effects of a dam may not be realised for hundreds of years after construction. A dam can thus be regarded as a huge, long-term and largely irreversible environmental experiment without a control.

    The dams create a backwater effect that extends upstream, in large impoundments of water. That also slows water travel times, to 7 to 15 times longer between upstream and downstream points in the. 3. Capping of impoundments for closure reduces infiltration and allows for further reduction in saturation levels, particularly in dry climates. 4. Aging effects related to cementation and oxidation processes of tailings in the unsaturated zone, which may increase the liquefaction resistance of .

    The ratio of tailings to concentrate is commonly very high, generally around (Lottermoser, ).Moreover, as the point of peak metal production is surpassed, the extraction of lower grade ore is an established long-term trend (Mason et al., ).For example, in Australia the average Cu grade was c. 10% in but it fell to 1% by , whereas in Canada the average Ni grade was c. 5% Cited by: Along with highlighting the pros and cons of hydropower, the study also reveals that the positive and negative effects are not being adequately examined in the hydropower relicensing process. The study outlines opportunities to reduce the negative environmental impacts of hydropower without significant economic drawbacks.


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Environmental effects of dams and impoundments in Canada by R. M. Baxter Download PDF EPUB FB2

OF DAMS AND IMPOUNDMENTS R. Baxter Canada Centre for Inland Waters, Applied Research Division, Burlington, The most dramatic environmental effects are.

Get this from a library. Environmental effects of dams and impoundments in Canada: experience and prospects.

[R M Baxter; Pierre Glaude; Canada. Department of Fisheries and Oceans.] -- Survey of the environmental consequences of dam construction and water impoundment in Canada in the past to alert environmentalists and engineers to the problems that may be associated with such.

Get this from a library. Environmental effects of dams and impoundments in Canada: experience and prospects. [R M Baxter; Pierre Glaude; Canada. Department of Fisheries and Oceans.].

ENVIRONMENTAL EFFECTS OF DAMS AND IMPOUNDMENTS R. Baxter Canada Centre fo r Inland Waters, Applied Research Division, Burlington, Ontario, Canada INTRODUCTION + Most of the primary civilizations of the world emerged in or near river valleys.

The construction of dams and other hydraulic structures is, therefore, one of the oldestFile Size: KB. By R M. Baxter and P Glaude, Published on 01/01/ Title. Environmental effects of dams and impoundments in Canada: Experience and prospectsCited by: Baxter, R. M., and P.

Glaude. Environmental effects of dams and impoundments in Canada: Experience and prospects. Can. Bull. Fish. : Julian Rzóska. Dams in Canada There are o dams in Canada of which 1, are categorised as “large” dams under the ICOLD definition.

These dams are owned by the federal and provincial governments, electric utilities, industrial and mining companies, irrigation districts, municipalities and private individuals. Environmental Effects of Dams and Impoundments Article in Annual Review of Ecology and Systematics 8(1) November with Reads How we measure 'reads'.

The structure and functioning of such ecosystems rely on the alternation of extreme events, e.g., flood and drought (Junk et al.

), a dynamic pulsing that disappears with impoundment, because dams usually decrease maximum discharges (absence of seasonal flood pulses) and stabilize or increase minimum discharges. Consequently, hydrological connectivity Cited by: 7. ENVIRONMENTAL IMPACTS OF DAMS ENVIRONMENTAL IMPACTS OF DAMS Terrestrial Ecosystems and Biodiversity Greenhouse Gas Emissions Downstream Aquatic Ecosystems and Biodiversity Impacts of changes in flow regimes Impacts of trapping sediments and nutrients behind a dam Blocking migration of aquatic organisms   Effects On Geology.

During the construction of dams in the past, the geology of the area was rarely or never put into consideration. The sudden filling of reservoirs with millions of gallons of water has caused seismic instability and causes tremors and minor earthquakes.

Dams, Ecosystem Functions, and Environmental Restoration iii This is a working paper prepared for the World Commission on Dams as part of its information gathering activities.

The views, conclusions, and recommendations contained in the working paper are not to be File Size: 1MB. Dams, Reservoirs and Flow Regulation Terry D.

Prowse,1 Fred J. Wrona2 and Geoff Power3 1 Environment Canada, National Water Research Institute, Victoria, BC 2 Environment Canada, National Water Research Institute, Saskatoon, SK 3 University of Waterloo, Department of Biology, Waterloo, ON Current Status Trends Emerging Issues Knowledge and Program Needs Acknowledgements and.

the environmental and social impacts for many decades to come. Consequently, there is a need to improve environmental practices in the operation of both existing and new dams. This paper provides a brief review of the consequences for ecosystems and biodiversity resulting directly from the presence of dams File Size: KB.

Environmental Effects of Dams and Impoundments Environmental Effects of Dams and Impoundments Baxter, R M Most of the primary civilizations of the world emerged in or near river valleys. The construction of dams and other hydraulic structures is, therefore, one of the oldest branches of engineering (e.g.

11, ). The downstream ecological effects of large impoundments have previously been reviewed; however, little is known about the downstream ecological effects of small man-made impoundments. In this review, we examine 94 papers focusing on the effects of small impoundments on stream habitat conditions and by: Environmental effects of dams and impoundments in Canada: Experience and prospects.

Canadian Bulletin of Fisheries and Aquatic Sciences Review of literature on environmental impacts of dams, including info on water level fluctuations and drawdown zones.

Hydroelectric power includes both massive hydroelectric dams and small run-of-the-river plants. Large-scale hydroelectric dams continue to be built in many parts of the world (including China and Brazil), but it is unlikely that new facilities will be added to the existing U.S.

fleet in the future. Designing safe and stable tailings dam structures with centrifuge modelling E. De Souza The Robert M. Buchan Department of Mining, Queen’s University, Canada Abstract The failure of a number of waste dumps and tailings dams over the last decade has directed public attention to the potential hazard and severe environmental.

Dams (environmental effects) Most dams are built to control flood hazards, to store water for irrigation or other uses, or to produce electricity. Along with these benefits come environmental costs including riparian habitat loss, water loss through evaporation and seepage, erosion, and declining water r-reaching consequences of dams include changes in groundwater flow and the.

Although dams can provide some benefits, dams produce severe negative impacts on the rivers they harness. Dams alter a river’s chemical, physical, and biological processes. Although these negative impacts have become more obvious over the past two decades, the environmental costs of dams have only recently captured scientific attention.Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an gs are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed.

The extraction of minerals from ore can be done two ways: placer mining, which uses water.Effects of impoundment. Installation of a weir on the Tamur River and Mewa Khola has changed m and m long river stretches, respectively, into two small reservoirs.

Dudh Koshi is now turned into a reservoir of mm 3 storage, of which mm 3 is live storage. The riverine habitat of km will be converted into a ha.