Study on shearing force and impact force of a volcanic mud flow on Mt. Sakurajima

Abstract

Two kinds of shearing stress meters (type A and type B) were set on the channel bottom in the Arimura River and the Mochiki River on Mt. Sakurajima. Volcanic mud flows take place there about 100 times a year. The results of the surveys demonstrated that the actual shearing force of a volcanic mud flow on Mt. Sakurajima was from 0.46 to 2.50 kgf/cm². The actual impact force caused by collisions of big stones, which were contained in a mud flow, with the channel bottom was calculated theoretically at about 15 times greater than the dead loads of the stones. The collision of stones in a mud flow caused great abrasion of concrete.

Parent Publication

• Proceedings of the IUFRO technical session on geomorphic hazards in managed forests: 5-11 August 1990: Montreal, Canada

Citation

Taniguchi, Yoshinobu. 1991. Study on shearing force and impact force of a volcanic mud flow on Mt. Sakurajima. In: Rice, Raymond M., technical coordinator. 1991. Proceedings of the IUFRO technical session on geomorphic hazards in managed forests; 5-11 August 1990; Montreal, Canada. Gen. Tech. Rep. PSW-GTR-130, Berkeley, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; p. 72-78