Simplified expressions for vegetation roughness length and zero-plane displacement as functions of canopy height and area index |
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| Authors: | M R Raupach |
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| Institution: | (1) CSIRO Centre for Environmental Mechanics, GPO Box 821, 2601 Canberra, ACT, Australia |
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| Abstract: | Using a previous treatment of drag and drag partition on rough surfaces, simple analytic expressions are derived for the roughness length (z
0) and zero-plane displacement (d) of vegetated surfaces, as functions of canopy height (h) and area index ( ). The resulting expressions provide a good fit to numerous field and wind tunnel data, and are suitable for applications such as surface parameterisations in atmospheric models. |
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