Skip to main content

Bed Strength

  • 67 Accesses

Part of the Encyclopedia of Earth Sciences Series book series (EESS)

Bed strength (shear) represents the internal strength of the bed. It is determined by the amount of internal frictional resistance within the bed material. Bed strength depends on the sediment composition and the state of consolidation of bed. Shear strength increases when sediment grains are tightly packed together. Silt and clay particles, if present in a bed material, tend to stick together as a result of cohesive (attractive) electrochemical forces between the particles and so help in erosion resistance. Under normal flow conditions, there is a balance between the erosive power of the flow and the strength of the bed material. The changes in the channel form during major flood events, when the erosive power of the flow is greatly increased, depend on how much resistance is provided by the bed and banks. Bed erosion takes place when the bottom shear stress exceeds the strength, i.e., resistance forces, of the bed. The shear strength of the cohesive sediment bed is generally a...

This is a preview of subscription content, access via your institution.

Buying options

Chapter
USD   29.95
Price excludes VAT (USA)
  • DOI: 10.1007/978-90-481-2642-2_41
  • Chapter length: 1 pages
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
eBook
USD   549.99
Price excludes VAT (USA)
  • ISBN: 978-90-481-2642-2
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
Hardcover Book
USD   699.99
Price excludes VAT (USA)

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Vijay Kumar .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and Permissions

Copyright information

© 2011 Springer Science+Business Media B.V.

About this entry

Cite this entry

Kumar, V. (2011). Bed Strength. In: Singh, V.P., Singh, P., Haritashya, U.K. (eds) Encyclopedia of Snow, Ice and Glaciers. Encyclopedia of Earth Sciences Series. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2642-2_41

Download citation