RESEARCH ARTICLE
Run-out Effects of Debris Flows Based on Numerical Simulation
Jun Wang1, 2, Yan Yu3, *, Xinfeng Wei4, Qinghua Gong1, 2, Haixian Xiong1, 2
Article Information
Identifiers and Pagination:
Year: 2016Volume: 10
First Page: 848
Last Page: 858
Publisher ID: TOCIEJ-10-848
DOI: 10.2174/1874149501610010848
Article History:
Received Date: 07/07/2016Revision Received Date: 09/09/2016
Acceptance Date: 13/10/2016
Electronic publication date: 29/12/2016
Collection year: 2016
open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
Abstract
Debris flows are a common natural disaster in mountainous areas and often cause severe casualties and property loss. Debris-flow run-out effects analysis can provide an idea of the spatial risks posed to the downstream area of a debris flow, which is extremely important for local populations’ lives, disaster mitigation and planning the layout of economic construction. The objective of this study is to develop a new method to quantify debris flow run-out effects by combining debris flow simulation results and data for different types of land use within the inundated area. After a three-dimensional numerical simulation platform was established, the numerical simulation method was applied as a modeling tool to simulate the inundated areas and final buried depths under rainfalls with different return periods. The simulated result for flow depth under a 100-year return period rainfall event was validated based on field measurements. Finally, the debris-flow run-out effects under different return periods were analyzed by combining the simulation results and land use data. The proposed method can enhance the accuracy of debris-flow spatial risk assessment and has great value for application.