Closure depth
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{{Definition|title=Closure depth | {{Definition|title=Closure depth | ||
| − | |definition= 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= 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<ref name=”Karsten”>Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.</ref>. |
}} | }} | ||
==Definition of Closure Depth – Further notes== | ==Definition of Closure Depth – Further notes== | ||
| − | The closure depth can be calculated using the expression<ref>Hallemeyer, R. J., 1981. "A profile Zonation for Seasonal Sand Beaches from Wave Climate". Coastal Engineering, Vol 4, 253-277.</ref> which is valid for "normal" sandy coastal profiles: | + | <ref name="Karsten"/>The closure depth can be calculated using the expression<ref>Hallemeyer, R. J., 1981. "A profile Zonation for Seasonal Sand Beaches from Wave Climate". Coastal Engineering, Vol 4, 253-277.</ref> which is valid for "normal" sandy coastal profiles: |
:d<sub>1</sub> = 2.28H<sub>S,12h/y</sub> - 68.5 (H<sup>2</sup><sub>s,12h/y</sub>) / (gT<sup>2</sup><sub>s</sub>) | :d<sub>1</sub> = 2.28H<sub>S,12h/y</sub> - 68.5 (H<sup>2</sup><sub>s,12h/y</sub>) / (gT<sup>2</sup><sub>s</sub>) | ||
Versie van 15 feb 2007 om 09:58
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
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Definition of Closure Depth – Further notes
[2]The closure depth can be calculated using the expression[3] 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
- ↑ Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.
- ↑ Citefout: Onjuiste tag
<ref>; er is geen tekst opgegeven voor refs met de naamKarsten - ↑ Hallemeyer, R. J., 1981. "A profile Zonation for Seasonal Sand Beaches from Wave Climate". Coastal Engineering, Vol 4, 253-277.
