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Measurement of the Flow Resistance of Vegetation



Ryan L. Falkenstein-Smith, Kevin B. McGrattan, Blaza Toman, Marco G. Fernandez


This report documents the measurement of the wind resistance of different types of vegetation. The measurements are made in a wind tunnel with a 2.0 m test section and 0.5 m by 0.5 m cross- section. Samples of vegetation have been cut into cubical volumes that span the cross-section of the tunnel. The wind resistance is inferred via measurement of the pressure drop across the sample at wind speeds ranging from 2 m/s to 8 m/s. The results are compared to empirical correlations quantifying the wind resistance of regularly spaced vertical tubes of comparable geometric characteristics.
Technical Note (NIST TN) - 2039
Report Number


Vegetation Canopy, Drag Coefficient, Wind Tunnel


Falkenstein-Smith, R. , McGrattan, K. , Toman, B. and Fernandez, M. (2019), Measurement of the Flow Resistance of Vegetation, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 27, 2024)


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Created April 1, 2019