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Establishment of Debris Flow Warning System by Using Runoff Hydrograph Model
Cheng –Yu Lin
Debris flow warning system
Taiwan is vulnerable to several natural disasters such as landslide, floods, debris flow, and earthquake. Rainfall and/or earthquake induced landslides could easily trigger debris flow and then threaten the safety of properties and human being. Currently, the debris flow observation systems are mostly adopted as the warning system to alarm the residents to evacuate in advance while encountering the disaster of debris flow. The devices of wire sensor, geosound sensor, and infrared cameras (CCD) are classified as the post-event type sensor, which only has the shorter response time, and can hardly be satisfied with as the precaution system. The purposes of this study is to use the change point derived from comparing theoretical and observing runoff hydrograph model for early detecting the potential occurring of debris flow so as to increasing the response time. The references of related previous studies and the currently used debris flow observation systems are collected and explored to compare with the warning system established using runoff hydrograph model. The results show that the model can be applied to establish an efficient warning system for debris flow occurring precaution.
|Appears in Collections:||第46卷 第01期|
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