VLAAMS INSTITUUT VOOR DE ZEE
PLATFORM VOOR MARIEN ONDERZOEK


Persoonlijke instellingen
Naamruimten

Varianten
Handelingen


Closure depth: verschil tussen versies

Uit Kust Wiki
Ga naar: navigatie, zoeken
 
(Eén tussenliggende versie door één gebruiker wordt niet weergegeven)
Regel 1: Regel 1:
 
{{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 10:06

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.