土石流引致之地聲能量與流量關係之探討

Exploring the Relationship between Underground Sound Energy Caused by Debris Flow and Discharge

黃文爍(Wen-shuo Huang)

指導教授 ： 劉格非

國立臺灣大學/工學院/土木工程學研究所/碩士(2019年)

https://doi.org/10.6342/NTU201903995

摘要

本研究彙整神木村愛玉子溪歷史所發生過的土石流事件，並且整理出以地聲探測器（Geophone）所檢測到不同土石流事件發生時的震動訊號，以及氣象局所設立測站觀測到的這些土石流事件發生前後的降雨歷程。利用短時距傅立葉轉換（STFT）分析土石流歷史事件所檢測到的地聲訊號，同時透過降雨與逕流之關係利用合理化公式依據降雨過程估算愛玉子溪的逕流歷線。
除了對歷史事件進行分析以外，本研究亦前往神木村愛玉子溪現場進行實驗，測量愛與子溪中下游段不同地點的流量以及地聲。
本研究期望通過對地聲訊號的分析以及對逕流歷線的估算，探求土石流發生時流量與地聲之關係。

關鍵字

地聲探測器 ； 逕流歷線 ； 短時距傅立葉變換 ； 流量 ； 地聲能量

並列摘要

This research collected the debris flow events which occurred in the Aiyuzi River in Shenmu Village at first, then compiled the surface vibration signals detected by the geophone and the rainfall observed by the Shenmu station established by the Central Weather Bureau. Using Short Time Fourier Transform to analyze the vibration signals. At the same time, through the relationship between rainfall and turbulence, the rationalization formula is used to estimate the turbulent flow of the Aiyuzi River based on the rainfall process.
In addition to the analysis of historical events, the research also went to the site of Aiyuzi River in Shenmu Village to measure the flow velocity and underground sounds of different locations around the Aiyuzi River.
This research hopes to explore the relationship between the discharge and the underground sound energy when the debris flow occurs by analyzing the vibration signal and estimating the hydrograph.

並列關鍵字

Geophone ； Hydrograph ； Short Time Fourier Transform ； Discharge ； Underground Sound Energy

參考文獻

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