@article{oai:niigata-u.repo.nii.ac.jp:00028166,
 author = {和泉, 薫},
 journal = {新潟大学積雪地域災害研究センター研究年報, 新潟大学積雪地域災害研究センター研究年報},
 month = {Jan},
 note = {Relations among the total volume (V) of avalanche snow in a rupture zone, the vertical height (H), the total horizontal distance (L) and the altitude (h) of the highest point of rupture (Fig. 1) were investigated, using the records of recent 17　avalanches which brought disaster including several large-scale avalanches (Table 1). The following results were obtained: 1) The equivalent coefficient of friction (μ=H/L) decreases with an increase in avalanche volume (V) (Fig. 2). An avalanche larger in scale can travel a longer horizontal distance for the same vertical height at which it occurs. (The arrow in the figure was put on the avalanche which went down naturally without encountering structures such as the house, the bridge and the steel tower.) 2) Large-scale avalanches greater than 1×10^5 m^3 in volume are surface avalanches of dry snow and have smaller equivalent coefficients of friction than any other avalanche (Fig. 2). 3) The excessive travel distance (L_e) can be defined as the horizontal distance of the front of the avalanche beyond the distance one expects from a frictional slide down with a coefficient of kinetic friction of tan 32°, namely, L_e = L – H/ tan 32°. The excessive travel distance (L_e) of the dry snow avalanche which indicates the mobility of the avalanche increases with an increase in avalanche volume (V) (Fig. 4) and increases linearly with an increase in altitude (h) of the highest point of rupture (Fig. 6). 4) The minimum value of the angle (θ) of elevation of the avalanche from the outer end of debris to the highest point of rupture (Fig. 1) is considered to be 18° empirically in Japan. Figure 3 shows that almost all avalanches meet this criterion.},
 pages = {187--194},
 title = {大規模雪崩の流動性 (中俣三郎教授退官記念号）},
 volume = {7},
 year = {1986}
}