長岡における積雪の断面観測資料(1990.12〜1991.4)

概要

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Profile observations of the physical properties of snow cover in Nagaoka were carried out every day, from December, 1990 to April, 1991. The items of observation are as follows : snow depth (HS), snow temperature (T), grain shape of snow (F), grain size of show (D), Canadian hardness of snow (CR), snow density (ρ), water equivalent of snow (HW), weather and air temperature. The results of the observations are summarized as follows : (a) The maximum depth of the new snow on to the old snow cover was 63cm, and the new snow density and hardness ranged from 0.026 to 0.176 g/cm^3, and from 0.005 to 0.350 kgf/cm^2, respectively. (b) The maximum snow depth and the maximum water equivalent of the total snow cover were 191cm and 581.7mm, respectively, and the mean snow density over the total snow cover was in the range of 0.211 to 0.468g/cm^3.
独立行政法人防災科学技術研究所の論文
1991-10-31