The Framework to Compute Width and Area of Debris-Flow Based on DAN3D

Abstract

This study describes an algorithmic framework developed to compute the width and area of debris-flow using the results from DAN3D program (McDougall, 2006) that simulates debris-flow hazards. Currently, DAN3D program discretizes debris-flow into particles and analyzes each particle individually. However, this presents some limitation to calculate the width and area of debris-flow, as it requires analyzing the debris-flow as a continuous mass, rather than individual particles. Therefore, the developed framework considers the collection of particles as a continuous mass of debris-flow to compute the width and area of debris-flow by using the established algorithms, such as Shoelace formula and Convex Hull. The width and area of debris-flow are expected to function as effective and reliable data for estimating the damaged basin caused by the debris-flow. Accordingly these data can be used in designing structure to mitigate debris-flow hazards. Keywords: Debris-Flow, DAN3D, Convex Hull, Shoelace formula