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En objektiv metod för att bestämma läplanteringars läverkan

Lidgren, Erik and Runnström, Micael (1987) In Lunds universitets Naturgeografiska institution - Seminarieuppsatser
Dept of Physical Geography and Ecosystem Science
Abstract
An objective method for calculating shelter effect of shelter belts -
The projekt describes a method for objective classification of shelter effect for natural shelter belts. lt is aimed at producing a number of diagrams from which the shelter effect of a natural shelter, with a photographically determined porosity, can be predicted.
Measurements of shelterbelt porosity has been made by analyzing black and white photographs with a computer aided image analyzing system (EBBA).
The measured sheltereffect from a number of shelterbelts was correlated with the photographical porosity at six points with increasing distance from the shelterbelt. It was found that the correlation was good, and for every scattergram a regression-line with... (More)
An objective method for calculating shelter effect of shelter belts -
The projekt describes a method for objective classification of shelter effect for natural shelter belts. lt is aimed at producing a number of diagrams from which the shelter effect of a natural shelter, with a photographically determined porosity, can be predicted.
Measurements of shelterbelt porosity has been made by analyzing black and white photographs with a computer aided image analyzing system (EBBA).
The measured sheltereffect from a number of shelterbelts was correlated with the photographical porosity at six points with increasing distance from the shelterbelt. It was found that the correlation was good, and for every scattergram a regression-line with determined confidence limits was calculated.
It has been shown that prediction can be made with acceptable accuracy at distances 5 ; 7,5 ; 10 ; 12,5 and 15 h from the shelter. (Less)
Please use this url to cite or link to this publication:
author
Lidgren, Erik and Runnström, Micael
supervisor
organization
alternative title
An objective method for calculating shelter effect of shelter belts
year
type
M2 - Bachelor Degree
subject
keywords
läplantering, geografi, naturgeografi, läverkan
publication/series
Lunds universitets Naturgeografiska institution - Seminarieuppsatser
report number
7
language
Swedish
additional info
Thomas Nihlen, Lunds universitet.
id
2375683
date added to LUP
2012-03-22 11:24:27
date last changed
2019-08-13 18:40:03
@misc{2375683,
  abstract     = {An objective method for calculating shelter effect of shelter belts -
The projekt describes a method for objective classification of shelter effect for natural shelter belts. lt is aimed at producing a number of diagrams from which the shelter effect of a natural shelter, with a photographically determined porosity, can be predicted.
Measurements of shelterbelt porosity has been made by analyzing black and white photographs with a computer aided image analyzing system (EBBA).
The measured sheltereffect from a number of shelterbelts was correlated with the photographical porosity at six points with increasing distance from the shelterbelt. It was found that the correlation was good, and for every scattergram a regression-line with determined confidence limits was calculated.
It has been shown that prediction can be made with acceptable accuracy at distances 5 ; 7,5 ; 10 ; 12,5 and 15 h from the shelter.},
  author       = {Lidgren, Erik and Runnström, Micael},
  keyword      = {läplantering,geografi,naturgeografi,läverkan},
  language     = {swe},
  note         = {Student Paper},
  series       = {Lunds universitets Naturgeografiska institution - Seminarieuppsatser},
  title        = {En objektiv metod för att bestämma läplanteringars läverkan},
  year         = {1987},
}