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A New Technique for Measuring Vegetation Density

by Syndi J. Dudley, (A.M.ASCE),
Steven R. Abt, (F.ASCE),
Charles D. Bonham,
J. Craig Fischenich, (M.ASCE),



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

Detennination of the discharge capacity of a vegetated channel or floodplain requires a reasonable estimate of a flow resistance coefficient; such as Manning' n. While a number of methods for estimating resistance coefficients for vegetated channels have been published which require measures of vegetation density, minimal guidance is available to assist the practicing engineer in obtaining these values. A technique for measuring vegetation density using an inclined density point frame is presented and an example of its application is provided.

Subject Headings: Vegetation | Flow resistance | Load and resistance factor design | Water discharge measurement | Flow measurement | Channels (waterway) | Water discharge

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