An experiment of wind-profile measurements above a maize crop was described.
显示更多 [+] 显示较少 [-]First the mean ratio between the height of the adapted layer and the fetch was deduced from profile measurements at several positions in the field.
显示更多 [+] 显示较少 [-]The height-to-fetch ratio amounted to 1/64.
显示更多 [+] 显示较少 [-]Because of too small a fetch, the vertical transport of momentum between the maize crop and the atmosphere could not be estimated accurately enough from the windprofile measurements only.
显示更多 [+] 显示较少 [-]The parameters of the assumed logarithmic wind profile, the zero-plane displacement and the roughness length, could only be estimated from a comparison of wind-profile measurements with simultaneous eddy-correlation measurements.
显示更多 [+] 显示较少 [-]In the present experiment, the zeroplane displacement d and the roughness length z0 could be expressed in the height h of the full-grown crop as d = 0.5 h and z0 = 0.11 h, respectively.
显示更多 [+] 显示较少 [-]The application of a common empirical relationship from the literature (e.g.
显示更多 [+] 显示较少 [-]D = 0.6 h) led to considerable systematic errors of the estimated friction velocity above maize.
显示更多 [+] 显示较少 [-]AGROVOC关键词
书目信息
出版者 for Agricultural Pub. and Documentation | Wageningen : Centre for Agricultural Pub. and Documentation, 1978