礫石型土石流之觸發降雨特性與監測訊號判釋

Translated title of the contribution: Rainfall Threshold and Signal Interpretation for Gravelly Debris Flows

Hsien Ter Chou, Yi Syu Ciou, Chia Min Hsu, Chih Hsuan Huang, Ching Jen Lin, Ben Huan Guo

Research output: Contribution to journalArticlepeer-review

Abstract

Rainfall-induced gravelly debris flows can cause devastating disasters downstream. Both onsite monitoring and rainfall warning systems are effective countermeasures to mitigate damages. In this study, the onsite signals collected at the Houyenshan monitoring station from 2007 to 2019 were analyzed, and the relationship between the effective accumulated rainfall and the traveling distance of gravelly debris flows was established. Gravelly debris flows occurred as pulse flows for 2–3 min, and the peak frequencies were recorded within a range of 15–45 Hz. Runoff and high concentration flow were recorded at a higher frequency of 50–70 Hz and lasted for longer than 5 min. The signals generated by background noises such as wind, rock falls, and earthquakes could be identified based on their amplitudes, frequency, and duration.

Translated title of the contributionRainfall Threshold and Signal Interpretation for Gravelly Debris Flows
Original languageChinese (Traditional)
Pages (from-to)16-26
Number of pages11
JournalJournal of Chinese Soil and Water Conservation
Volume54
Issue number1
DOIs
StatePublished - Mar 2023

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