Debris flow run off simulation and verification

Case study of Chen-You-Lan Watershed, Taiwan

M.-L. Lin, K.-L. Wang, J.-J. Hunag

Research output: Contribution to journalArticle

33 Citations (Scopus)
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Abstract

In 1996 typhoon Herb struck the central Taiwan area, causing severe debris flow in many subwatersheds of the Chen-You-Lan river watershed. More severe cases of debris flow occurred following Chi-Chi earthquake, 1999. In order to identify the potentially affected area and its severity, the ability to simulate the flow route of debris is desirable. In this research numerical simulation of debris flow deposition process had been carried out using FLO-2D adopting ChuiSue
river watershed as the study area. Sensitivity study of parameters used in the numerical model was conducted and adjustments were made empirically. The micro-geomorphic database of Chui-Sue river watershed was generated and analyzed to understand the terrain variations caused by the debris flow. Based on the micro-geomorphic analysis, the debris deposition in the Chui-Sue river watershed in the downstream area, and the position and volume of debris deposition were determined. The simulated results appeared to agree fairly well with the results of micro-geomorphic study of the area when not affected by other inflow rivers, and the trends of debris distribution in the study area appeared to be fairly consistent.
Original languageEnglish
Pages (from-to)439-445
Number of pages7
JournalNatural Hazards and Earth System Sciences
Volume5
Issue number3
Publication statusPublished - 2005
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2005. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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