長岡における積雪の断面観測資料(1989.12〜1990.2)

概要

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Profile observations of physical properties of snow cover in Nagaoka were carried out every day, from December 1989 to February 1990. Items of observation are as follows ; snow depth (HS), snow temperature (T), grain shape of snow (F), grain size of snow (D), Canadian hardness of snow (CR), snow density (ρ), water equivalent of snow (HW), weather and air temperature. The results of observation are summarized as follows ; (a) Maximum depth of new snow onto the old snow cover was 49cm, and new snow density and hardness ranged from 0.042 to 0.150 g/cm^3, and from 0.002 to 0.100 kgf/cm^2, respectively. (b) The maximum snow depth and the maximum water equivalent of total snow cover were 119 cm and 263.2 mm, respectively, and mean snow density over total snow cover was in the range from 0.105 to 0.439 g/cm^3.
独立行政法人防災科学技術研究所の論文
1990-10-18