Select issue
Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
1950-1959
1940-1949
1926-1939
Acta Forestalia Fennica
1992-1999
1984-1991
1974-1983
1968-1973
1953-1968
1933-1952
1913-1932
Articles containing the keyword 'coastal protective forest'
Category : Research article
article id 501,
category
Research article
(2003).
Modeling relative wind speed by optical stratification porosity within the canopy of a coastal protective forest at different stem densities.
Silva Fennica
vol.
37
no.
2
article id 501.
https://doi.org/10.14214/sf.501
Keywords:
coastal protective forest;
optical porosity;
Pinus thunbergii;
vertical forest structure;
wind speed
Abstract |
View details
|
Full text in PDF |
Author Info
Wind speed and optical stratification porosity (OSP) were measured at various heights inside a coastal protective forest thinned to different stem densities to assess whether any characteristics of the wind profile in the coastal protective forest could be predicted from OSP. OSP was defined as vertical distribution of the proportion of sky hemisphere not obscured by tree elements inside a forest stand, and was determined for various heights using hemispherical photographic silhouettes on a computer processing system. The distribution of OSP in the coastal forest follows the Lambert-Beer’s law with an extinction coefficient (v). The relative wind speed within the canopy can be described using an exponential form with an attenuation coefficient (a). Variation in relative wind speed was very closely correlated with the distribution of OSP within the canopy. While below the canopy, i.e., in the trunk space, relative wind speed was little correlated with the distribution of OSP because the distribution of OSP was relatively constant there. Therefore, the linear relationships between relative wind speed and OSP and between the two coefficients v and a were established within the canopy. The results suggest that OSP can be used to predict the wind profile in case of the application within the canopy of the coastal forest.
-
Zhu,
Qingyuan Station of Forest Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, P.R. China; Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan
E-mail:
jiaojunzhu@iae.ac.cn
- Gonda, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail: yg@nn.jp
- Matsuzaki, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail: tm@nn.jp
- Yamamoto, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail: my@nn.jp
Click this link to register to Silva Fennica.
If you are a registered user, log in to save your selected articles for later access.
Your selected articles
Silva Fennica ·
Finnish Society of Forest Science
