Weight of Brushy Forest Fire Fuels from Photographs

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Abstract:

Color photographs of 3.1- and 1.55-ft-thick cross-sections of southern bayberry (Myrica cerifera L.) shrubs against a contrasting background were taken horizontally from 16 ft with the line of sight 5 ft above the ground line. When transparencies were projected onto a dot grid, dot counts for the 1.55-ft thickness were highly correlated with ovendry weights of leaves, twigs, and draped pine needles from a 10-plot calibration sample. The photographic method, including calibration, would provide an acceptably accurate estimate of weight and other characteristics of shrubby vegetation for a fraction of the cost of physical sampling. One calibration should suffice for a given species and might suffice for a group of species having similar ranges of leaf size and crown density. Forest Sci. 17:119-124.

Keywords: Myrica cerifera; sampling methods

Document Type: Journal Article

Affiliations: Research Technician, Southern Forest Exp. Sta., USDA Forest Service, Alexandria, La., Privately employed

Publication date: March 1, 1971

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