@article{oai:niigata-u.repo.nii.ac.jp:00028229,
 author = {中俣, 三郎},
 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 = {Mar},
 note = {1. We must consider how to protect the area which does not have avalanche defenses from avalanche hazard. In such area, it is important to get avalanche forecasting. Forecasting are classified by the following three methods. 1 Meteorological conditions 2 Investigation of snow profile on the slope 3 Measurement of glide velocity Nowadays, the forecasting is not sufficiently advanced to predict the exact time of occurrence. Method 3 will be the most reliable one on account of its measurements which can detect snow moving directly. Accordingly, we should examine gliding in detail. This has already been mentioned by R. HAEFELI, who has given a lot of literature. But utilizing it, we found that the glide distribution on the slope did not apply satisfactorily to our experiments. We detected glide velocity on the slope where there should essentially be no sliding on account to μ>tan φ. So, we adopted the following treatment for friction on the slope: coef. of friction increases continuously from the upper end of the slope to the Iower. Under this conception, we obtained Formulae 10, 11. In this case, condition tan φ>(2μ_1+μ_2) /3 is indispensable. 2. To forecast avalanche hazard, we chose the artificial slope with the inclination of 15, the length of 20m, the width of 5m.We set six emitters of glidemeter in the sloping snow cover. From the values of gliding, we estimated whether the sloping snow cover was stable or not. Table 6 shows the value of each gliding represented by daily counts. It shows that in this slope the stability of sloping snow is clearly distinguishable according as the glide is active or not. From these effects we examined the time of occurrence of the avalanches which happened in the neighborhood while the gliding was active. Fig.7 shows the relations between the glide velocity (represented by an hour count) measured on this artificial slope and the time of avalanche occurrence. As shown in Fig.7, we had the possibility of avalanche forecasting even with a few instances given here. We are to continue our experiments on a lot more examples.},
 pages = {81--98},
 title = {雪崩予知の研究},
 volume = {2},
 year = {1980}
}