山岳地における風速変動の風向横方向の空間相関

Abstract

Wind turbulence data were obtained along the test line of about 700 m on the ridge.The distribution of mean wind speeds and power spectra and lateral space correlations wereanalyzed. The distribution of mean wind speed is largely affected by the local topographyand it is found that wind speed increases on the ridge. The peak wave number of powerspectrum is much smaller than that on the flat terrain and the universal form of the spectrummay be expressed by the wave number with spatial mean wind speed. The lateral coherencewas obtained and the decay constant was larger than that for the flat terrain, whichsuggests that longitudinal scale of the eddy is elongated due to increase of wind speed onthe ridge.