WIND REGIME BENEATH CROP CANOPIES AND ITS MODEL

The characteristic features of horizontal and vertical wind-speed distribution beneath crop canopy are discussed. It is found that there exists an assymmetric "S" pattern vertical profile. Deficiency of commonly used models of horizontal and vertical profiles inside crops is also analysed. A new model describing wind speed inside crops is proposed on basis of theoretical analysis and empirical fitting. According to this new model the computed mean wind speed, whether in horizontal distribution or along vertical profile, is fairly good conformity with the real data.