Point Monitoring Automatic Geohazards Warning System
DOI:
https://doi.org/10.64862/Keywords:
Automatic warning, Debris flow, Precision warningAbstract
A debris flow monitoring and warning system has been installed in the midstream section of Yusui Stream, Taiwan. The monitoring station operates fully automatically, providing early warnings without the need for manual intervention.
The system comprises two webcam cameras, two MEMS sensors, and a rain gauge. The system can detect debris flows and calculate velocity, flow height and flow rate automatically.
Once debris flows are detected, the system automatically issues warnings to the affected areas via voice messages, Line messages, broadcasts, and web-based alerts. The precision warning criteria are obtained through numerical simulation before any event.
On July 24th, 2014, Typhoon Gaemi triggered several debris flows, and the system successfully issued several warnings automatically. The entire video record, along with depth variation data, was recorded automatically.
References
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Baum, R. L., and Godt, J. W. (2010). Early warning of rainfall-induced shallow landslides and debris flows in the USA. Landslides, 7 (3), 259–272. https://doi.org/10.1007/s10346-009-0177-0
Liu, K. F., Kuo, T. I., and Wei, S. C. (2022). Debris flow detection using a video camera. In Proceedings of the Workshop on World Landslide Forum (pp. 141–147). Kyoto, Japan. https://doi.org/10.1007/978-3-030-60311-3_15
Wei, S. C., and Liu, K. F. (2019). Automatic debris flow detection with geophones. Landslides, 17 (2), 349–359. https://doi.org/10.1007/s10346-019-01258-9
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