2017 Fiscal Year Final Research Report
Exploration the interaction between snow cover and rock for rock-on-snow avalanches
| Project/Area Number |
26702008
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (A)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Research Field |
Natural disaster / Disaster prevention science
|
|---|
| Research Institution | Kitami Institute of Technology |
|---|
Principal Investigator |
|
|---|
| Research Collaborator |
Has Baator
Nagata Hidehisa
|
|---|
| Project Period (FY) |
2014-04-01 – 2018-03-31
|
| Keywords | 岩石雪なだれ / 地すべり / 落石 / 雪崩 / 崩壊 / 雪 / 豪雪地帯 |
|---|
| Outline of Final Research Achievements |
We explored whether certain snow cover characteristics facilitate long travel distances. We dropped about 5.8 cubic meters of rock fragments on 28-m-long slopes covered by snow. At the experiment site, snow falls from November to March, and in the early and late season, freeze-thaw cycles occur; as a result, snow cover conditions evolve depending on meteorological conditions. To simulate erosion of the snow cover by flowing material, we carried out four experiments on these slopes with various snow cover conditions and two slope angles. In two experiments, the flowing materials stopped after short travel distances and just pushed on its lower snow cover. In contrast, in the other two experiments, the flowing materials spread more widely and traveled farther. The H/L ratio of the latter two experiments were smaller than those of the former two experiments. The hard surfaces of the base snow covers in the latter tests formed under freeze-thaw conditions.
|
| Free Research Field |
応用地質学
|
