@article{oai:niigata-u.repo.nii.ac.jp:00028188,
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 = {Jan},
note = {The characteristics of avalanche at the starting zone were mentioned in Part 1 (Nakamata, 1983). In this report relates to mechanism of dynamic avalanche mainly to velocity and runout distance. For fundamental idea we adopted the theory of momentum of avalanche motion, due to Perla (1980). As a result, we obtained similar velocity V^2=(M・α/K)(1-e-^<-2kx/M>) and runout distance x=(M/2K) ln (1 + KⅤ^2o/Mα_2). But, it is important to decide these factors M, K, α which are contained in the equation. On account of determination α and K, it is necessary to estimate the value of Coef. Of Kinetic friction μ_k and to research the drag resistance KV^2. For full depth avalanche we set μ_k ≥ 0.5, for powder avalanche μ_k=0.1～0.3. For the drag resistance we applied the measured values of impact pressure f=(3～6.9) pV^2. Using these results, we adopted to the case study of avalanche that is occurred at Sumon in 1981. We obtained reasonable results for the most parts},
pages = {77--87},
title = {雪崩の危険度について(その2) : 速度・流出距離},
volume = {5},
year = {1984}
}