Closure depth

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Definition of Closure depth:
The depth beyond which no significant longshore or cross-shore transports take place due to littoral transport processes. The closure depth can thus be defined as the depth at the seaward boundary of the littoral zone[1].
This is the common definition for Closure depth, other definitions can be discussed in the article

Definition of Closure Depth – Further notes

[1]The closure depth can be calculated using the expression[2] which is valid for "normal" sandy coastal profiles:

d1 = 2.28HS,12h/y - 68.5 (H2s,12h/y) / (gT2s)


where dl is the closure depth relative to mean low water-level
HS,12h/y is the nearshore significant wave height exceeded 12 hours per year, and
Ts is the corresponding significant wave period.


References

  1. ↑ 1.0 1.1 Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.
  2. ↑ Hallemeyer, R. J., 1981. "A profile Zonation for Seasonal Sand Beaches from Wave Climate". Coastal Engineering, Vol 4, 253-277.
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