En objektiv metod för att bestämma läplanteringars läverkan
(1987) In Lunds universitets Naturgeografiska institution - SeminarieuppsatserDept 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:
http://lup.lub.lu.se/student-papers/record/2375683
- author
- Lidgren, Erik and Runnström, Micael
- supervisor
- organization
- alternative title
- An objective method for calculating shelter effect of shelter belts
- year
- 1987
- 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}}, language = {{swe}}, note = {{Student Paper}}, series = {{Lunds universitets Naturgeografiska institution - Seminarieuppsatser}}, title = {{En objektiv metod för att bestämma läplanteringars läverkan}}, year = {{1987}}, }