大規模崩塌多元多尺度綜合監測、資料綜整分析與滑動機制研究：以太平山蘭台地區為例－大規模崩塌多元多尺度綜合監測、資料綜整分析與滑動機制研究：以太平山蘭台地區為例

2015-01-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/705394摘要：本計畫以三年為期，涵蓋五項子計畫，選擇宜蘭地區太平山蘭台地區為研究地區，建置涵蓋衛星雷達影像、地表單頻與雙頻GPS、大地電場即時監測與井下光纖之綜合監測系統，以了解降雨、地下水壓、地下水位、地表滑移量與滑動面滑移量間之相互關係，進而了解研究區域之崩塌發生機制與觸發條件。此外，透過不同時間與空間尺度監測資料之比較分析，評估不同監測方法之經濟效益與可能之最佳配置，並針對可能不同地質與地形條件之大規模崩塌潛勢發生區位提出不同監測組合。第一年工作涵蓋研究區域背景資料蒐集、遙測影像判釋、現地調查、井孔鑽探與監測系統建置。透過地表GPS、近景攝影、角形反射器與全測站反射稜鏡之設置，進行地表位移之監測，同時利用TCP-InSAR 及D-INSAR 之分析技術，解算ALOS 衛星雷達影像反應的地表變形速率。此外，除鑽探岩心之力學分析外，井孔將佈設光纖水壓及滑移監測系統監測地下水壓與滑動面滑移資料。第二年工作重點在崩塌監測資料綜整分析、發生機制研究與監測成效評估。建立研究區域綜合監測系統後，持續進行資料蒐集分析，並評估監測系統之穩定性與改進方式。此外，利用監測之資料，發展單頻GPS 即時解算技術、TCP-InSAR 與GPS 資料聯合解算技術、建構研究區域坡體水文與邊坡破壞模式並進行相關參數率定。第三年工作包括大規模坡地崩塌破壞機制、發育模式、影響評估及監測方法經濟效益評估。由前兩年所建立之監測資料，除發展大規模崩塌滑動面逆推之運動學分析模式，確認研究區域大規模崩塌之破壞與發生機制及其破壞後之可能影響範圍。同時透過多年監測資料之分析比較，評估多元多尺度監測資料綜合運用之可行性及各種不同監測方法之經濟效益評估，同時評估在不同地質與地形條件下，可能不同監測方法之組合。 <br> Abstract: In this proposed study that comprising five subprojects, a comprehensive monitoring system including the application of total station/monitoring pins, single frequency GPS, new drilling (core and sample analyses), electric resistivity survey, InSAR, and fiber optics sensors will be installed in Lan-Tai area to monitor the activity and to understand the sliding mechanism of large scale landslides for three years. In addition, the efficiency and economics of each monitoring technique will be evaluated by comparisons of the investment and the quality of collected data. Subsequently, different combinations of survey techniques for monitoring large scale landslides in different geologic and geomorphologic terrains will be proposed. In the first year, aerial photos, satellite images, and 1 m resolution DEM of the study area will be collected and interpreted. A detailed field mapping will then be conducted and three boreholes will be drilled, and followed by installation of different survey systems in the selected profile or drilling sites. In the second year, the collected data will be analyzed to compare the accuracy of different types of data. The stability of the monitoring system will be evaluated and improved. The primitive hydrologic and failure model of the study area will be established according to field survey and monitoring data. In addition, the module for real time analysis of single frequency GPS will be developed. In the last year, the slip mechanism and triggering threshold of the large scale landslide in the study area will be proposed. The efficiency and economics of each monitoring technique will be evaluated according to the investment and the quality of collected data. For large scale landslides in different geologic and geomorphologic terrains, different combinations of monitoring techniques will be proposed.大規模崩塌監測系統崩塌機制deep-seated landslidemonitoring systemlandslide mechanism大規模崩塌多元多尺度綜合監測、資料綜整分析與滑動機制研究：以太平山蘭台地區為例－大規模崩塌多元多尺度綜合監測、資料綜整分析與滑動機制研究：以太平山蘭台地區為例