Difference between revisions of "Dune"

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{{Definition|title=Dune
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{{Definition|title= Subaerial coastal sand dunes
|definition= Ridges or moulds of loose, wind blown sand (fine to medium) forming on the backshore and forming the coastal features at certain locations. Dunes are more or less vegetated. Dunes are active coastal form elements acting as a flexible sand reservoir<ref name="Karsten">Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.</ref>. }}
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|definition=  
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Ridges or moulds of loose, wind-blown sand (fine to medium) forming on the [[backshore]] and forming the coastal features at certain locations. Dunes are more or less vegetated. Dunes are active coastal form elements acting as a flexible sand reservoir<ref name="Karsten">Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.</ref>.
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==Notes==
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{{Definition|title= Subaqueous dunes, frequently called "sandwaves" in shelf seas
At eroding coasts dunes are moving backwards in parallel with the erosion process. Dunes act as a kind of flexible natural protection against [[erosion]] and flooding. If the vegetation is damaged by too much traffic or grazing etc. the integrity of the dunes may be endangered<ref name="Karsten"/>.
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|definition= Bed forms induced by the interaction of the seabed with (mainly tidal) currents.  
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}}
  
The coastal [[sand dunes]] of Europe are one of the main categories in the Coastal Wikipedia forming one of the main coastal terestrial habitats.  There is also an extensive literature in the Wikipedia [http://en.wikipedia.org/wiki/Sand_dune].
 
  
The erosion of dunes resulting from a severe storm surge is also referred to as [[dune erosion]].
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==Notes subaerial coastal sand dunes==
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Because of the importance of the wind to the mobilisation of sediment, sand dunes develop from sand grains in the size range 0.2-2.0mm.
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At eroding coasts dunes are moving backwards in parallel with the erosion process. Dunes act as a kind of flexible natural protection against erosion and flooding, see [[Dune erosion]]. If the vegetation is damaged by too much traffic or grazing etc. the integrity of the dunes may be endangered, see [[Shore protection vegetation]].
  
==See also==
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==Notes subaqueous dues==
Articles about the protection and erosion of dunes:
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Sandy seabeds are often covered with dune fields in regions where the maximum tidal current velocity is in the range 0.5-1.5 m/s. Dune spacing (more than 10 m and less than 1000 m) depends mainly on water depth. Dunes can reach a height of 10-50% of the water depth; high dunes present a risk for navigation<ref> Dronkers, J. 2017. Dynamics of Coastal Systems. World Scientific Publ. Co, Singapore, 740 pp.</ref>.
* [[Coastal erosion]]: article on two types of erosion, [[dune erosion]] and [[structural erosion]].
 
* [[Dune stabilisation]]: article on the protection of dunes against [[erosion]].  
 
  
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==External links==
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Wikipedia article on sand dunes [http://en.wikipedia.org/wiki/Sand_dune].
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==Related articles==
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:[[Sand dunes]]
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:[[Dune erosion]]
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:[[Dune stabilisation]]
  
 
==References==
 
==References==
 
 
<references/>
 
<references/>
  
 
[[Category:Sand dunes]]
 
[[Category:Sand dunes]]

Latest revision as of 17:28, 28 March 2021

Definition of Subaerial coastal sand dunes:
Ridges or moulds of loose, wind-blown sand (fine to medium) forming on the backshore and forming the coastal features at certain locations. Dunes are more or less vegetated. Dunes are active coastal form elements acting as a flexible sand reservoir[1].
This is the common definition for Subaerial coastal sand dunes, other definitions can be discussed in the article
Definition of Subaqueous dunes, frequently called "sandwaves" in shelf seas:
Bed forms induced by the interaction of the seabed with (mainly tidal) currents.
This is the common definition for Subaqueous dunes, frequently called "sandwaves" in shelf seas, other definitions can be discussed in the article


Notes subaerial coastal sand dunes

Because of the importance of the wind to the mobilisation of sediment, sand dunes develop from sand grains in the size range 0.2-2.0mm. At eroding coasts dunes are moving backwards in parallel with the erosion process. Dunes act as a kind of flexible natural protection against erosion and flooding, see Dune erosion. If the vegetation is damaged by too much traffic or grazing etc. the integrity of the dunes may be endangered, see Shore protection vegetation.

Notes subaqueous dues

Sandy seabeds are often covered with dune fields in regions where the maximum tidal current velocity is in the range 0.5-1.5 m/s. Dune spacing (more than 10 m and less than 1000 m) depends mainly on water depth. Dunes can reach a height of 10-50% of the water depth; high dunes present a risk for navigation[2].


External links

Wikipedia article on sand dunes [1].


Related articles

Sand dunes
Dune erosion
Dune stabilisation

References

  1. Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.
  2. Dronkers, J. 2017. Dynamics of Coastal Systems. World Scientific Publ. Co, Singapore, 740 pp.