One-dimensional numerical simulation for sabo dam planning using Kanako (Ver. 1.40): A case study at Cipanas, Guntur Volcanoes, West Java, Indonesia

Sumaryono, Kana Nakatani, Yoshifumi Satofuka and Takahisa Mizuyama

A debris flow is a phenomenon in which large quantities of water, mud, and gravel flow down a stream at a high velocity. Because debris flows have such high density and velocity, they can be highly destructive and can have severe and tragic results such as destruction of homes, bridges, and infrastructures, as well as loss of life. Numerical simulations are important to ensure that countermeasures such as sabo dams will be efficient before construction. This paper presents one-dimensional numerical simulations of a debris flow usingKanako, a user-friendly GUI-equipped debris flow simulator that allows good visualization and easy explanation. Kanako (Ver. 1.40) was applied to a case study at Cipanas, Guntur Volcanoes,West Java, Indonesia. Simulations tested various conditions including cases without any sabo dams, with various types of sabo dams either alone or in a series, and with full sabo dams.