Debris flows monitoring and localization using infrasonic signals
- 58 Downloads
Infrasonic waves (frequency ≤ 20 Hz) are generated during the formation and movement of debris flows, traveling in air with a speed far higher than that of the debris-flow movement. Infrasound monitoring and localization of infrasonic waves can serve as warning properties for debris-flows. Based on the characteristics of infrasonic signals, this study presents a three-point array of infrasound sensors as time-synchronous multiple sensors for acquiring signals. In the meantime, the signals are sorted by mutual correlation of signals to figure out their latency, and by means of array coordinating to locate the sound source to realize the monitoring and positioning of a debris-flows hazard. The method has been in situ tested and has been proven to be accurate in monitoring debris-flow occurrences and determining their positions, which is particularly effective for pre-event warning of debris-flow hazards.
KeywordsDebris flow Infrasound Debris flow monitoring Localization
Unable to display preview. Download preview PDF.
This research was supported by the National Natural Science Foundation of China (Grant No. 41501114), the General Project of Education Department in Sichuan Province (16ZB0104) and the Science and Technology Service Network Initiative (No. KFJ-SW-STS-180).
- Chou HT, Cheung YL, Zhang SC (2007) Calibration of infrasound monitoring system and acoustic characteristics of debris-flow movement by field studies. Debris-flow hazards mitigation: mechanics, prediction, and assessment. Rotterdam, Millpress. pp 571–580.Google Scholar
- Cook RK (1962) Strange sounds in the atmosphere. Part I. Sound: Its Uses and Control 1(2): 12–16. DOI: 10.1121/1.2369552Google Scholar
- Cruden DM, Varnes DJ (1996) Special report -national research council, Transportation research board:247Google Scholar
- Kang ZC (1993) Debris flow kinetic characteristics under natural conditions. Journal of Hydrodynamics 4): 104–111.Google Scholar
- Kogelnig A, Hubl J, Surinach E, et al. (2011) A study of infrasonic signals of debris flow. Proceedings of 5th International Conference on Debris-Flow Hazards: Mitigation, Mechanics, Prediction and Assessment. Padua, Italy. Italian Journal of Engineering Geology and Environment. pp 563–572. DOI: 10.4408/IJEGE.2011-03.B-062Google Scholar
- Le Pichon A, Herry P, Mialle P, et al. (2005) Infrasound associated with 2004–2005 large sumatra earthquakes and tsunami. Geophysical Research Letters 32(19). DOI: 10.1029/2005GL023893Google Scholar
- Liu JM, Tang W, Wang XM, et al. (2010) Analysis of mechanism to produce infrasound signals and its characteristics. Environmental Engineering 28(4): 92–96. (In Chinese)Google Scholar
- Lu J, Yang Y (2012) Study on localization of infrasound waves radiated by natural events. The Journal of the Acoustical Society of America 131(4): 3351. DOI: 10.1121/1.4708560Google Scholar
- Lu J, Guo Q, Feng HN, et al. (2012) Anomalous infrasonic waves before an small earthquake in Beijing. Chinese Journal of Geophysics 55(10): 3379–3385. DOI: 10.6038/j.issn.0001-5733.2012.10.020(In Chinese)Google Scholar
- Matoza RS, Garcés MA, Chouet BA, et al. (2009) The source of infrasound associated with long period events at mount St. Helens. Journal of Geophysical Research: Solid Earth (1978–2012) 114(B4). DOI: 10.1029/2008JB006128Google Scholar
- Men CL, Gao WH, Feng HN, et al. (2011) Design of a widespread infrasound sensor array network system. Microcomputer Applications 32(12): 29–34. DOI: 10.3969/j.issn.2095-347X.2011.12.006 (In Chinese)Google Scholar
- Ripepe M, De Angelis S, Lacanna G, et al. (2010) Observation of infrasonic and gravity waves at Soufrière hills volcano, Montserrat. Geophysical Research Letters 37(19). DOI: 10.1029/2010GL042557Google Scholar
- Wei XY, Guo Q, Men CL, et al. (2011) Design of widespread infrasound monitoring system. Audio Engineering 35(5): 47–49. DOI: 10.3969/j.issn.1002-8684.2011.05.013 (In Chinese)Google Scholar
- Xu WJ, Guan HY, Wu XL (2013) Analysis of debris flow infrasound signal based on time-frequency analysis methods. Computer and Modernization 4): 36–39. DOI: 10.3969/j.issn.1006-2475.2013.04.009 (In Chinese)Google Scholar
- Zhang F, Yang QS, Xia YQ, et al. (2013) Infrasound:a new frontier in monitoring earthquakes. Earth Science Frontiers 20(6): 94–101.Google Scholar
- Zhang SC, Yu NY (2008) Infrasonic behavior of debris flow and infrasonic warning device. Proceeding of International Conference: Debris Flow: Disasters, Risk, Forecast, Protection. Pyatigorsk, Russia, pp 22–29.Google Scholar
- Zhang SC, Yu NY (2010) Early warning system to debris flow. Journal of Mountain Science 28(3): 379–384. DOI: 10.3969/j.issn.1008-2786.2010.03.017 (In Chinese)Google Scholar
- Zhong DL, Zhang JS, Xie H, et al. (2011) Techniques of debris flow alarm. Journal of Mountain Science 29(2): 234–242. DOI: 10.3969/j.issn.1008-2786.2011.02.013 (In Chinese)Google Scholar