Coastal and Shelf Sediment Transport - Special Publication by P. S. Balson, M. B. Collins

By P. S. Balson, M. B. Collins

For the geoscientist, curiosity in sediment dynamics pertains to the certainty of recent procedures, including their extrapolation to the translation of old deposits in the stratigraphic checklist. through the years, numerous size strategies and clinical techniques were utilized to the choice of sediment delivery pathways and the derivation of abrasion, shipping and deposition charges. lately, a couple of new options and techniques were built, linked to diversified temporal and spatial scales, and it truly is applicable and well timed to study a consultant choice, by means of connection with lately undertaken coastal and shelf investigations. a number of the contributions within the quantity hide, for instance: optical and acoustic backscatter measurements; particle monitoring; using multibeam imagery; grain-size development research; and analytic, numerical and conceptual modelling. even if no unmarried approach presents an entire option to the matter posed, this evaluate will support sedimentologists and sediment dynamicists of their number of the main acceptable methods, in the direction of the institution of 'high self assurance' within the interpretation of sediment shipping premiums and directions.Also on hand: Alluvial lovers: Geomorphology, Sedimentology, Dynamics - ISBN 1862391890 Submarine Slope structures - ISBN 1862391777 Sediment Flux to Basins: factors, Controls and results - ISBN 1862390959

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Uk) 2Nicholas School of the Environment and Earth Sciences, Division o f Earth and Ocean Sciences, Duke University, Durham, North Carolina 27708, USA Abstract: Longshore sediment transport (LST) is an important component of many coastal systems. This common term is frequently expressed as an annual volume, either net or gross, passing a particular point. In spite of its importance as a factor in coastal morphodynamics it has received relatively little attention as a process. We review the mechanisms of longshore sediment transport and current approaches to its assessment using field measurement and geoindicators.

KOMAR, P. D. 1977. Selective longshore transport rates of different grainsize fractions within a beach. Journal of Sedimentary Petrology, 47, 1444-1453. KOMAR, P. D. 1988. Beach processes and sedimentation. Second Edition. Prentice Hall, New Jersey. KOMAR, P. & INMAN, D. 1970. Longshore sand transport on beaches. Journal of Geophysical Research, 75, 5914-5927. LONGSHORE SEDIMENT TRANSPORT KRAUS, N. C. 1987. Application of portable traps for obtaining point measurements of sediment transport rates in the surf zone.

Tracer experiments measure net transport in a short timeframe. As with all such methods, the long-term relevance is questionable. Optical and acoustic methods Optical and acoustic methods are used to measure suspended sediment concentrations (devices are laboratory calibrated against known concentrations), which are then combined with current meters to calculate sediment flux. Optical backscatter (OBS) has become a popular technique for short term studies of nearshore sediment transport. An array of OBS equipment was deployed by Miller (1999) to measure LST during storms at Duck pier, North Carolina.

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