Encyclopedia of Coastal Science

2005 Edition
| Editors: Maurice L. Schwartz

Depth of Closure on Sandy Coasts

  • Andrew Morang
  • William A. Birkemeier
Reference work entry
DOI: https://doi.org/10.1007/1-4020-3880-1_116

Kraus et al. (1999, p. 272) proposed the following definition of the depth of closure (DoC):

The depth of closure for a given or characteristic time interval is the most landward depth seaward of which there is no significant change in bottom elevation and no significant net sediment exchange between the nearshore and the offshore.

Figure D13illustrates the concept by showing the change in the nearshore profile resulting from a single storm. In this case, the DoC is 6.45 m as there is little change in the bottom deeper than this. Thus, the DoC separates the active nearshore from a less-active offshore and therefore is an important parameter in many coastal engineering projects. For example, in order to build out the entire beach profile, nourishment quantities are often computed by multiplying the desired added beach width by the DoC. In another application, numerical models of beach change use the DoC as an offshore limit to their computations. Because of its importance, the DoC is...
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Cross-references

  1. 1.
    Cross-Shore Sediment TransportGoogle Scholar
  2. 2.
    Cross-Shore Variation of Grain Size on BeachesGoogle Scholar
  3. 3.
    Dynamic Equilibrium of BeachesGoogle Scholar
  4. 4.
  5. 5.
    Net TransportGoogle Scholar
  6. 6.
    Numerical ModelingGoogle Scholar

Copyright information

© Springer 2005

Authors and Affiliations

  • Andrew Morang
  • William A. Birkemeier

There are no affiliations available