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Versie door Caitlin op 22 jan 2007 om 22:17
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.
Definition of Closure Depth – Further notes
The closure depth can be calculated using the expression 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.
- Hallemeyer, R. J., 1981. "A profile Zonation for Seasonal Sand Beaches from Wave Climate". Coastal Engineering, Vol 4, 253-277.