Analyzing Bedforms Mapped Using Multibeam Sonar to Determine Regional Bedload Sediment Transport Patterns in the San Francisco Bay Coastal System

  1. Michael Z. Li3,
  2. Christopher R. Sherwood4 and
  3. Philip R. Hill5
  1. Patrick L. Barnard1,
  2. Li Erikson,
  3. David M. Rubin1,
  4. Pete Dartnell1 and
  5. Rikk G. Kvitek2

Published Online: 3 JAN 2013

DOI: 10.1002/9781118311172.ch13

Sediments, Morphology and Sedimentary Processes on Continental Shelves: Advances in Technologies, Research, and Applications

Sediments, Morphology and Sedimentary Processes on Continental Shelves: Advances in Technologies, Research, and Applications

How to Cite

Barnard, P. L., Erikson, L., Rubin, D. M., Dartnell, P. and Kvitek, R. G. (2012) Analyzing Bedforms Mapped Using Multibeam Sonar to Determine Regional Bedload Sediment Transport Patterns in the San Francisco Bay Coastal System, in Sediments, Morphology and Sedimentary Processes on Continental Shelves: Advances in Technologies, Research, and Applications (eds M. Z. Li, C. R. Sherwood and P. R. Hill), John Wiley & Sons, Ltd, Chichester, West Sussex, UK. doi: 10.1002/9781118311172.ch13

Editor Information

  1. 3

    Geological Survey of Canada (Atlantic), Natural Resources Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, B2Y 4A2 Canada

  2. 4

    U. S. Geological Survey, Woods Hole, MA 02543-1598 USA

  3. 5

    Natural Resources Canada, Sidney, BC, Canada V8L 4B2

Author Information

  1. 1

    United States Geological Survey, Coastal and Marine Geology Program, 400 Natural Bridges Drive, Santa Cruz, CA 95060

  2. 2

    Seafloor Mapping Lab, Institute for Earth Systems Science & Policy, California State University, Monterey Bay, 100 Campus Center, Seaside, CA 93955-8001

Publication History

  1. Published Online: 3 JAN 2013
  2. Published Print: 26 JAN 2012

ISBN Information

Print ISBN: 9781444350821

Online ISBN: 9781118311172

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Keywords:

  • bedforms;
  • sand waves;
  • multibeam;
  • San Francisco;
  • estuary;
  • sediment transport

Summary

The length, height, depth and asymmetry of 3386 individual bedforms were measured from high-resolution grids derived from a series of multibeam surveys conducted in the San Francisco Bay coastal system. Powerful tidal currents that can exceed 2.5 ms-1 generate bedforms that measure up to 317 m in wavelength, and up to 10 m in height. Detailed analysis of bedform shape indicates that there are regions where ebb-directed or flood-directed bedload transport is predominant, revealing important sediment transport pathways. The increased mapping resolution of multibeam technology over the past decade allows for the gathering of highly detailed, quantitative information regarding bedforms and thus advances understanding of coastal sediment transport processes and provides valuable information to coastal managers for more efficient sediment resource management.