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ORIGINAL RESEARCH article

Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 12 - 2024 | doi: 10.3389/feart.2024.1443738
This article is part of the Research Topic Investigation, Monitoring, Stability and Risk Assessment of Geohazards View all 13 articles

A typhoon-induced debris flow warning model integrating rainfall thresholds with geological factors

Provisionally accepted
Yiming Wang Yiming Wang 1*Dengcai Xu Dengcai Xu 2Youjian Yang Youjian Yang 1Minglang Zhou Minglang Zhou 2Wenqing Chen Wenqing Chen 2Wei Lin Wei Lin 3
  • 1 Wenzhou University, Wenzhou, China
  • 2 Wenzhou Geological Environment Monitoring Center, Wenzhou, China
  • 3 Other, Lishui, China

The final, formatted version of the article will be published soon.

    Typhoon-induced debris flows pose a significant threat to the southeastern coastal regions of China. The existing typhoon-induced debris flow warning models, however, are largely limited in the refinement of their rainfall thresholds and in their lack of integration with geological factors. This study proposes a typhoon-induced debris flow warning model based on refined rainfall thresholds by integrating them with geological factors. Firstly, based on the characteristic rainfall of 159 debris flows in seven typhoon rainstorms between 1999 and 2019, the rainfall thresholds of debris flow under different geological conditions were obtained. Close relationships were noticed between rainfall thresholds and the number and density of debris flow disasters. The deterministic coefficient method (DCM) and sensitivity index were used to derive the weights of the geological factors, and the geological groups of the rock masses and vegetation type were the most important geological factors for debris flows. Finally, a typhoon-induced debris flow warning model was constructed, and refined rainfall thresholds were obtained. Due to different geological backgrounds, there were significant differences in the warning rainfall thresholds for debris flow disasters in different regions of the study area. The ROC indicator showed the high accuracy of this debris flow warning model. This research provides a scientific basis for the early warning and prediction of debris flows in typhoon-prone area of China.

    Keywords: Typhoon rainstorm, Debris flow, Geological factor, Rainfall threshold, Warning model

    Received: 04 Jun 2024; Accepted: 01 Aug 2024.

    Copyright: © 2024 Wang, Xu, Yang, Zhou, Chen and Lin. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Yiming Wang, Wenzhou University, Wenzhou, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.