Numerical simulation of debris flow affected area caused by different precipitations

Meei-Ling Lin, Te-Wei Chen*, Yu-Chung Lin, Tien-Chien Chen, Chun-Ya Su, Kuo-Lung Wang, Shiao-Yue Huang, Mei-Jen Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

Abstract

Typhoon Morakot struck south Taiwan in 2009, and caused severe debris flow hazards damaging resident houses and infrastructures in the downstream affected area. In order to understand the affected area of the debris flow caused by different rainfall, field investigation of the debris flow affected area was conducted for five debris torrents that were triggered by both Typhoon Morakot in 2009 and Typhoon Kalmaegi in 2008. The debris flow affected area and depth of sediment on debris flow sediment fan were traced and measured after Typhoon Morakot. Numerical simulation was conducted using FLO-2D to understand the affected area, velocity of debris flow and depth of sediment by typhoons Morakot and Kalmaegi. The simulation results suggested that the higher accumulated rainfall leads to larger sediment volume, higher flow velocity, and larger affected area. However, the ranges of debris deposition were affected by the terrain and rainfall pattern. The simulation results provide good references the mitigation of the debris flow hazards.

Original languageEnglish
Title of host publicationEngineering geology for society and territory - volume 2
Subtitle of host publicationlandslide processes
EditorsGiorgio Lollino, Daniele Giordan, Giovanni B. Crosta, Jordi Corominas, Rafig Azzam, Janusz Wasowski, Nicola Sciarra
Place of PublicationCham, Switzerland
PublisherSpringer, Springer Nature
Pages495-499
Number of pages5
ISBN (Electronic)9783319090573
ISBN (Print)9783319090566
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event12th International IAEG Congress - Torino, Italy
Duration: 15 Sep 201419 Sep 2014

Conference

Conference12th International IAEG Congress
CountryItaly
CityTorino
Period15/09/1419/09/14

Keywords

  • affected area
  • numerical simulation
  • debris flow
  • different rainfall

Cite this

Lin, M-L., Chen, T-W., Lin, Y-C., Chen, T-C., Su, C-Y., Wang, K-L., ... Chen, M-J. (2015). Numerical simulation of debris flow affected area caused by different precipitations. In G. Lollino, D. Giordan, G. B. Crosta, J. Corominas, R. Azzam, J. Wasowski, & N. Sciarra (Eds.), Engineering geology for society and territory - volume 2: landslide processes (pp. 495-499). Cham, Switzerland: Springer, Springer Nature. https://doi.org/10.1007/978-3-319-09057-3_81