本研究鑑於土石流對於人民生命財產危害重大，因此研發一土石流地聲警報器，希望在土石流造成災害之前，先行對當地居民提供警告，以供居民防災及保護生命財產。本研究使用地聲檢知器(geophone)作為量測土石流的主要儀器，並由土石流歷史事件中的地聲資料設立土石流地聲警戒值，當地聲檢知器所量得的地聲資料到達所訂定之土石流地聲警戒值時，即透過GSM系統傳送簡訊發佈土石流訊息。在土石流地聲警報器設置完成後，本研究即以野外實驗及珊珊颱風期間之現地測試來驗證其實用性，並佐以過去土石流案例來驗證其可行性。驗證結果顯示，當地聲資料達門檻值時，本研究之土石流地聲警報器均能適時的將訊息傳遞到遠端訊息接收處，並且可藉由鉛蓄電池供電系統，在野外單獨運作。當獨自放置於郊外時，也能夠每小時傳回簡訊回報儀器設備狀況。在颱風過境之後，土石流地聲警報器內部儲存之地聲資料，可供以分析研究及驗證土石流發生的訊息。而從土石流歷史事件案例分析中也證實本研究之土石流地聲警戒值之可行性。

The purpose of this study is to develop a debris flow alarm device which can provide warning signals to the occurrence of debris flows. In this alarm device, geophone is used to measure the ground vibrations produced by debris flows. Based on the ground vibration signals of the historical debris flow events happened in Taiwan, a threshold value of the ground vibration for detecting debris flows was determined. When the ground vibration signals detected by geophone reach the threshold value, this alarm device will automatically send a message to announce the occurrence of debris flows through the GSM (Global System for Mobile Communication). This device has been tested in several field tests and proved to be capable of recording the ground vibrations produced by artificially produced rock motions and delivering warning signals to the remote receiver. During the period of Shan-Shan typhoon, this device has also been installed to monitor the ground vibrations. Although no debris flows occurred, this device has sent messages every hour to confirm that the apparatus was working well.

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