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Sunday, July 19, 2020 | History

2 edition of Variability in stream erosion and sediment transport found in the catalog.

Variability in stream erosion and sediment transport

L. J. Olive

Variability in stream erosion and sediment transport

by L. J. Olive

  • 214 Want to read
  • 7 Currently reading

Published by IAHS Press, Office of the Treasurer, IAHS in Wallingford, Oxfordshire, UK, Washington, D.C .
Written in English

    Subjects:
  • Stream conservation.,
  • Sediment transport.

  • Edition Notes

    Statementedited by L. J. Olive, R. J. Loughran, J. A. Kesby.
    SeriesIAHS publication -- no. 224.
    ContributionsLoughran, Robert Jude., Kesby, Julie A., 1963-, International Association of Hydrological Sciences.
    The Physical Object
    Paginationx, 498 p. :
    Number of Pages498
    ID Numbers
    Open LibraryOL18074017M
    ISBN 100947571191

    This index does not separate the primary sources of erosion, overland flow and transport, from bank or bed erosion, nor is it sensitive to transport efficiencies both on uplands and in a stream. Areas may have substantial perennial vegetative cover, on moderately or low erodible soils, but significant sediment input from bank erosion. Sediment Transport is a book that covers a wide variety of subject matt ers. Physicists, engineers, mathematicians, statisticians, and geologists have been investigating sedi- sediment dynamics in stream confl uence or river diversion; analytical modeling applied to studies on fl uid-bed in- climatic variation or changes in vegetative.

    The sediment transport model was set with point sources of sand dredging, and fully calibrated and validated by observed hydrological data and remote sensing results. Simulations under different dredging intensities were implemented to investigate the impacts of the spatiotemporal variation of the SSC. GSTARS (Molinas and Yang ) was used to simulate and predict the variation of channel geometry and pattern along the unlined emergency spillway of the Willow Creek Reservoir. The simulation was based on 50% of the probable maximum flood. A total of three stream tubes and Yang’s () sediment transport formula were used in all simulations.

    The book examines the processes of erosion, transportation, and deposition of sediment particles under gravity, flowing water, waves, and wind. Chapters also cover rare phenomena and topics such as hyperconcentrated flows, effect of sediment existence on water flow, large-scale hydraulic construction on sediment-laden streams, and. An important source of sediment is streambank erosion. In , LJEA and Appalachian State University assessed 21 stream reaches for erosion potential. Ten of the reaches had low erosion potential and eleven had moderate erosion potential, two sites being ranked just below a high erosion hazard index.


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Variability in stream erosion and sediment transport by L. J. Olive Download PDF EPUB FB2

Variability in stream erosion and sediment transport. Proceedings of the Symposium on Variability in Stream Erosion and Sediment Transport held in Canberra, Australia, December Description: x, pages: illustrations ; 25 cm. Variability in stream erosion and sediment transport.

Wallingford: International Association of Hydrological Sciences, (OCoLC) Material Type: Conference publication: Document Type: Book: All Authors / Contributors: L J Olive; R J Loughran; J A Kesby; International Association of Hydrological Sciences. Variability in Stream Erosion and Sediment Transport (Proceedings of the Canberra Symposium, December ).

IAHS Publ.Spatial variation in suspended sediment transport in the Murrumbidgee River, New South Wales, Australia L. OLIVE Department of Geography and Oceanography, Australian Defence Force Academy. The heavier, coarser‐grained sediment strikes the stream bed more frequently and with more force than the smaller particles, resulting in an increased rate of erosion.

Circular depressions eroded into the bedrock of a stream by abrasive sediments are called potholes. The scouring action is greatest during flood conditions. ISBN ; Book Review: Variability in Stream Erosion and Sediment Transport edited by L. Olive, R. Loughran and J. Kesby, International Association of Hydrological Sciences Publication No.IAHS Press, Wallingford, The large amount of form resistance associated with stable steps limits the amount of sediment transport that occurs in steep streams and makes the prediction of sediment transport difficult (Rickenmann,; Rickenmann et al., ; Yager et al., ).Johnejack () found that applying the Meyer-Peter, Muller, Yang, and Einstein transport formulas to a steep stream.

Variability in Stream Erosion and Sediment Transport (Proceedings of the Canberra Symposium, December ). IAHS Publ.Variability of sediment load and its impacts on the Yellow River LONG YUQIAN, QIAN YIYING Institute of Hydraulic Research, Yellow River Conservation Commission, ZhengzhouChina XIONG GUISHU.

2. Erosion and transport processes. The process of erosion can be described in three stages: detachment, transport and deposition. Detachment of sediment from the soil surface was originally considered to be exclusively the result of raindrop impact (e.g. Hudson, ), although the importance of overland flow as an erosive agent has now been recognised.

The section of Water Erosion and Sediment Transport publishes original research papers and reviews in all subfields of the topic, including: processes based on laboratory experiments or field data (in river basins, streams, estuaries, coastal waters); cutting-edge methods (new instruments, data processing, artificial intelligence, remote sensing, modelling); erosion (channel and.

This work has had led to: (1) improved understanding of how the flow and upstream sediment supply interact with channel geometry and bed-sediment grain size, (2) improved and new methods for accurately measuring sediment transport over long timescales, (3) improved methods for serving and visualizing river flow and sediment data on the web.

At the case study sites, longshore sediment transport is estimated to exceed m 3 /day (based on data from the sand trap at Durban harboursee e.g. Streams move downslope under the influence of gravity, the passage of water is called stream l factors control the amount of sediment that can be carried by a stream: 1) volume of stream flow, 2) the stream gradient, 3) shape of the stream channel, and 4) kinds and volume of sediments available for erosion in a drainage basin.

Sediment load characteristics of a proglacial stream of Siachen Glacier and the erosion rate in Nubra valley in the Karakoram Himalayas, India. J Hydrol. – that many simplifying assumptions are made. This is largely because sediment transport is a dynamic phenomenon and measurement techniques cannot register the ever-changing conditions that exist in water bodies, particularly in river systems.

Some of the sources of extreme variability in sediment transport are discussed below. Particle size. estimated transport rate = depth-averaged sediment concentration x mean flow velocity x depth Qs = Cs x v x d; main control over suspended sediment concentration: spatial & temporal variability in supply of sediment to stream; Bed load:.

The Third Edition Of This Book Recognises Two Important Developments That Have Taken Place In Recent Years.(1) Mathematical Modelling Of Alluvial River Processes, And(2) Environmental Aspects Relating To Of These Factors Have Been Duly Considered In This Edition.

With Its Detailed Analysis And Clear Presentation, This Book 5/5(1). Streams erode and transport sediment. As the loose sediments are moved along the bottom of the river channel, small bedforms (formations of sediment on the bottom of the stream bed) can develop, such as ripples and sand dunes.

The total load (quantity of sediment) of a stream can be described as consisting of three components. The erosion of mountain belts controls their topographic and structural evolution1,2,3 and is the main source of sediment delivered to the oceans4.

Mountain erosion rates have been estimated from. allow for flow variability and natural sediment transport, aquatic organism passage is reduced and the occurrence of streambed and streambank erosion on the downstream side of the crossing and aggradation on the upstream side of the crossing are predictable consequences.

The effects of an inappropriately designed crossing structure often extend. Sediment transport is the movement of solid particles (), typically due to a combination of gravity acting on the sediment, and/or the movement of the fluid in which the sediment is entrained.

Sediment transport occurs in natural systems where the particles are clastic rocks (sand, gravel, boulders, etc.), mud, or clay; the fluid is air, water, or ice; and the force of gravity acts to move .Spatial and temporal variability in stream sediment loads using examples from the Gros Ventre Range, Wyoming, USA Sandra E.

Ryan and Mark K. Dixon Abstract Sediment transport rates (dissolved, suspended, and bedload) measured over the course of several years are reported for two streams in the Gros Ventre Mountain.The significance of streambank erosion processes that contribute sediment to the total annual sediment transport has often been overlooked or misunderstood.

Most studies on sediment supply have been directed to surface erosion processes, which in many disturbed landscapes are the major sediment sources.

Streambank erosion contributions.