2018-01-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/661215摘要：本研究計畫主要著重於監測資料的加值分析，其中分為四大主要項目：(1)現場影像分析、(2)現場地聲訊號分析方法建立、(3)地聲訊號室內試驗與(4)地聲安裝位置之探討。第一項中，將透過影像估算土石流流速等現地物理分析；第二項則透過歷史土石流事件資料，建立偵測土石流到達與水流到達的判視條件，並嘗試建立土石流警戒標準；第三項則透過地聲室內試驗分別探討地聲特徵頻率與粒徑間的關係和地聲能量與流速或流量的關係；最後則透過波傳理論模擬不同層狀介質或不同波導環境的地表振動傳遞情況，並依此探討地聲裝設的環境條件或評估準則。不同項目的研究皆為土石流觀測站資料分析的需求項目，對於未來提升土石流觀測站的監測效益將有很大的幫助。<br> Abstract: The research project mainly focuses on the added-value analysis of monitoring data. It can be separated into four parts including (1) image analysis caught by video camera in field, (2) signal processing for in-situ ground vibration signal, (3) laboratory tests of geophone signal, and (4) discussion of installed place of geophone. In first target, we will build an image analysis method to estimate the surface velocities field of debris flow in field. In second target, a detecting method of ground vibration signal generated by debris flow will be built and provided for issuing warning. In third target, the characteristic of geophone signal in different flow conditions and environment conditions will be examined by laboratory test, and the relation of flow rate-signal power and particle sizes-signal central frequency will be surveyed as well. The final one will use wave theory to simulate underground acoustic in multi-layer media and other waveguide conditions. The installed conditions of geophone will be surveyed in underground acoustic simulation. In this project, each research targets are needed in debris flow monitoring system. With added-value analysis and further understanding of monitoring data, the benefit of monitoring system will be promoted to a higher level.地聲土石流GeophoneDebris Flow