Some measurements of wind over the cultivated field. (2)

Abstract

The vertical distributions of wind velocity over various fields under several conditions were observed being made use of several small Robinson cup anemometers installed to the pole of 6m high.
From the obtained results, the logarithmic law is adopted as follows:
U(z)=2.30V_*/klogZ-d/Z₀
where Z=height from the soil surface, k=0.45, V_*=friction velocity, d=zero plane displacement, and Z₀=roughness parameter.
The observed values of d and Z₀ as well as several relevant quantities are shown in Tabl 5.