RESEARCH ARTICLE
Spatial Distribution Features of Debris Flows at Active Fault Zone Along Ya-Lu Highway, China
Dingying Yang1, Zheng Han1, 2, Yange Li1, 2, *
Article Information
Identifiers and Pagination:
Year: 2017Volume: 11
First Page: 563
Last Page: 571
Publisher ID: TOCIEJ-11-563
DOI: 10.2174/1874149501711010563
Article History:
Received Date: 30/09/2016Revision Received Date: 10/02/2017
Acceptance Date: 31/05/2017
Electronic publication date: 28/07/2017
Collection year: 2017
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Introduction:
Active faults and accompanied tectonic activities are a key triggering factor for debris flows in mountainous region. In this paper, the spatial distribution of 19 debris flows along Ya-Lu highway in western China was analyzed.
Method:
We collected basic data of these 19 debris-flow gullies in the in-situ investigation work, and documented key parameters including watershed area, the averaged slope gradient, gully type, debris-flow magnitude, and developing stage of the gully. Based on the DTM data from SRTM database, the overall spatial distribution features of these debris flows are analyzed.
Result and Conclusion:
We used a polar coordinate system to illustrate the relationship between debris flow magnitude and the direct distance to the active fault. In this system, the spatial distribution of these debris flows is represented by the vertical distance to the fault and the angle between gullies to the fault. It is revealed that the debris-flow magnitude has a close positive relationship with the vertical distance to the active fault, that generally debris-flow magnitude increases as closing to the active fault.
