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Simulation model for evaluation of interception loss from forest trees. Technical completion report, OWRR project no. B-009-IDA Item Info

This portion of the study was conducted to develop models or methods of defining interception storage of snow on conifer trees. Field data obtained in physical modeling oi individual trees and data taken from the literature were used to define mathematical relationships for the intercepted precipitation and modeled ''species'' variations in trees. The defined relationships were subsequently incorporated in a computer simulation model for prediction of interception storage by a stand of trees. Comparison of interception storage derived from the stand model with measurements on the model trees indicates reasonable predictive capacity for both individual tree and stand models. Several forms of the sigmoid curve were useful in defining relationships between precipitation, interception storage and the end of storms and vegetational parameters, Surface ratio, related to crown projection area, was found to be a suitable parameter in defining differences in the format of the sigmoid curves. Second portion of the study was conducted to determine the interception characteristics of both artificial and real trees using artificial snow. A drum apparatus was constructed to allow ar+ificial snow to be dropped over the trees. It was found that for 3 ft. high artificial trees, the smaller branch angles intercept more snow than larger branch angles in terms of interception over projected areas of the tree. The shape of the interception vs precipitation curve is the same for both real and artificial trees except that the amounts are considerably less for real trees. There was no appreciable difference between the interceptionprecipitation curve for the two heights (3 ft & 6 ft) of the species of trees (real) tested.

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Title:
Simulation model for evaluation of interception loss from forest trees. Technical completion report, OWRR project no. B-009-IDA
Authors:
Belt, G. H.; Molnau, Myron
Date Created (ISO Standard):
1973-09
Description:
This portion of the study was conducted to develop models or methods of defining interception storage of snow on conifer trees. Field data obtained in physical modeling oi individual trees and data taken from the literature were used to define mathematical relationships for the intercepted precipitation and modeled ''species'' variations in trees. The defined relationships were subsequently incorporated in a computer simulation model for prediction of interception storage by a stand of trees. Comparison of interception storage derived from the stand model with measurements on the model trees indicates reasonable predictive capacity for both individual tree and stand models. Several forms of the sigmoid curve were useful in defining relationships between precipitation, interception storage and the end of storms and vegetational parameters, Surface ratio, related to crown projection area, was found to be a suitable parameter in defining differences in the format of the sigmoid curves. Second portion of the study was conducted to determine the interception characteristics of both artificial and real trees using artificial snow. A drum apparatus was constructed to allow ar+ificial snow to be dropped over the trees. It was found that for 3 ft. high artificial trees, the smaller branch angles intercept more snow than larger branch angles in terms of interception over projected areas of the tree. The shape of the interception vs precipitation curve is the same for both real and artificial trees except that the amounts are considerably less for real trees. There was no appreciable difference between the interceptionprecipitation curve for the two heights (3 ft & 6 ft) of the species of trees (real) tested.
Subjects:
interception loss water storage trees
Collection:
IWRRI
Series:
Water for Idaho
IWRRI number:
197302
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Preferred Citation:
"Simulation model for evaluation of interception loss from forest trees. Technical completion report, OWRR project no. B-009-IDA", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-belt_1973.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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