大雪山白雲岳における礫質ソリフラクションロウブの表面礫の移動 [in Japanese] Surface Stone Movements on Stone-banked Lobes in a Nivation Hollow on the Daisetsu Mountains, Hokkaido, Japan [in Japanese]
Access this Article
Search this Article
大雪山, 白雲岳東側の残雪砂礫地における礫質ソリフラクションロウブの表面にペンキラインを引いて, 表面礫の移動量を測定した。ロウブの中心部ほど表面礫の移動量は大きく, 縁辺部ほど小さいという結果が得られた。またロウブの縁辺部では地表の礫の配列をほとんど乱さずに集合的に移動するが, 中心部では個々の礫が散在的に移動することが観察された。
Downslope stone movements were measured on stone-banked lobes in a nivation hollow on the Daisetsu Mountains. Surface stones were painted on three lobes with gradients of 27, 22, 12 degrees in September, 1989. Displacements of the painted stones were measured in October 1991 and 1997.<br>The deformation features of painted lines showed lobe and tongue like patterns. The average rates of the movements were higher in the central part of the lobes, ranging from 4.5 to 9.2cm/year, while those in the marginal part ranged from 0.5 to 4.5cm/year. Stones moved uniformly with little disturbance of configuration in the marginal part. But stones were scattered in the central part. Smaller stones tended to be moved farther.
- Annals of The Tohoku Geographycal Asocciation
Annals of The Tohoku Geographycal Asocciation 50(3), 201-207, 1998-08-31
The Tohoku Geographical Association