Journal of the Japan Society of Erosion Control Engineering, Vol.58,No.4,2005
A study on reproduction method of debris flow characteristics in a steep
ravine
Hiroaki NAKAYA Kenichi MAEDA Michiyo SUGAI Taneo TSUTSUI Daisuke SUGII
Abstract
Debris flows have been widely analyzed as multi|phase mixing flows in the discipline
of continuous mechanics. With steep slope and little particle|liquid interaction,
however, they can also be analyzed as a behavior of particle grains and fluids
in discrete mechanics respectively. The applicability of Distinct Element Method
(DEM), a class of method following the latter framework, was studied for a steep
and rolling torrential ravine with the gradient of 22 degrees. The result of DEM
simulation shows close similarity in its pattern with measured flow velocity,
maximum flow depth, and flow winding at field observed points. Distinct Element
Method can be applied to kinetically simulate flow velocity and depth affected
by winding in torrential ravines.
Key words:debris flow, distinct element method, simulation, flow winding
Japan Society of Erosion Control Engineering
Sabo Kaikan, 2-7-5 Hirakawa-cho, Chiyoda-ku,
Phone +81-3-3222-0747 Fax +81-3-3230-6759
http://www.jsece.or.jp/
Mail jimu@jsece.or.jp