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系統識別號 U0026-0908201811464500
論文名稱(中文) 波形反演法於山崩研究之可行性探討:以2009年太麻里崩塌為例
論文名稱(英文) Investigating the feasibility of landslide waveform inversion approaches: A case study of Taimali landslide, Taiwan, on August 9th 2009
校院名稱 成功大學
系所名稱(中) 地球科學系
系所名稱(英) Department of Earth Sciences
學年度 106
學期 2
出版年 107
研究生(中文) 陳亮谷
研究生(英文) Liang-Gu Chen
學號 L46051015
學位類別 碩士
語文別 英文
論文頁數 101頁
口試委員 指導教授-林冠瑋
共同指導教授-趙韋安
口試委員-李恩瑞
口試委員-陳麒文
中文關鍵字 山崩  震波分析  波形反演  太麻里崩塌 
英文關鍵字 landslide  seismic analysis  waveform inversion  Taimali landslide 
學科別分類
中文摘要 山崩發生時,崩塌塊體在運動過程中與邊坡的相對運動會產生地震訊號而被地震站所記錄,因此近年來地震波分析逐漸成為山崩研究的有力工具之一,可用於判定或評估山崩發生的時間、地點與規模。而邊坡給予崩塌塊體的反作用力時間序列,則能夠藉由長週期地震波(週期數十到數百秒)的波形反演技術獲得,進而計算出山崩運動方向、位移距離、崩塌質量與體積等資訊,因此波形反演在山崩研究中的即時偵測,或是災後的地質分析與防減災應變都是相當重要與實用的研究方法。
本研究使用單點震源時間域波形反演法,對2009年莫拉克颱風期間形成的太麻里崩塌進行分析研究,得到山崩的反作用力時間序列,並比對多點震源時間域波形反演法的結果。藉由比較兩種波形反演法之異同,探討兩者優缺點、適用的山崩類型與時機,並了解使用限制與困難等。藉由結合兩種波形反演法,建立一套山崩波形反演流程,以利於未來對山崩的動力機制研究更加完善。
英文摘要 As a landslide occurs, seismic signals generated by the mass sliding on the slope could be recorded by seismometers nearby. Using waveform inversion techniques, the dynamic processes (e.g. sliding direction, velocity, and runout distance) of landslide could be explored by the inverted force-time function. Two time-domain waveform inversion techniques, Constraint Landslide Force History (CLFH) and Non-Constraint Landslide Force History (NLFH), were implemented in the study for the Taimali landslide occurring in 2009, Taiwan. The inverted force-time function for the landslide revealed the dynamic processes by two inversion methods respectively. The time series of velocity and displacement were compared with the remote sensing images and the digital elevation model. Two results revealed the differences of calculation mode and reflected dynamics between CLFH and NLFH. For comprehensively understanding of landslide source, CLFH and NLFH were combined and proposed a flow chart to establish a complete landslide inversion procedure.
論文目次 致謝 I
摘要 II
ABSTRACT III
Table of Contents VII
List of Tables IX
List of Figures XI
Chapter 1. Introduction 1
1.1 Background 1
1.2 Scope and Objectives 5
1.3 Outline 6
Chapter 2. Literature Review 7
2.1 Characteristics of landslide-induced ground motion 7
2.2 Seismic waveform inversions in landslide source 12
Chapter 3. Methods 21
3.1 Study area 21
3.2 Seismic data collection and data processing 25
3.3 Waveform inversion 27
3.3.1 Non-constraint Landslide Force History inversion 27
3.3.2 Constraint Landslide Force History inversion 36
Chapter 4. Result 39
4.1 Satellite image mapping of Taimali landslide 39
4.2 Frequency characteristics of seismic signals 42
4.2.1 Spectrogram analysis 42
4.2.2 High-frequency waveform (1-5 Hz) 44
4.2.3 low-frequency waveform (0.01-0.033 Hz) 51
4.3 Results of waveform inversion 60
4.3.1 Result of NLFH (Non-constraint Landslide Force History) inversion 60
4.3.2 Result of CLFH (Constraint Landslide Force History) inversion 72
Chapter 5. Discussion 75
5.1 Landslide mass estimation 75
5.2 Advantages and limits of the two waveform inversion methods 78
5.3 Application of a combination of two inversion methods
82
Chapter 6. Conclusions 84
Reference 86
Appendix 94

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