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Acoustic signals and geophone response of rainfall-induced debris flows
Chou, Hsien-Ter1; Chang, Yu-Lung1; Zhang, Shu-Cheng2,3
Corresponding AuthorChou, HT
2013
Source PublicationJOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
ISSN0253-3839
Volume36Issue:3Pages:335-347
SubtypeArticle
AbstractThe infrasound and geophone response of rainfall-induced debris flows are explored based on field studies. Both the stony-type debris flow which occurred in Houyenshan, Miaoli County, Taiwan, on 10 June 2006 and the muddy viscous debris flow which occurred in Jiangjia Gully, Yunnan, China, on 11 August 2007 were examined. Infrasound propagates a long distance in the atmosphere at the speed of sound due to its low adsorption in the air and the high reflectivity of the ground. The infrasonic signals induced by debris flows are related to the magnitude and composition of the debris flows. Our findings show that the peak acoustic frequencies for the Houyenshan stony debris flows are within the range 15-40 Hz, while the corresponding geophone signals exhibit peak frequencies within 15-50 Hz. The peak frequencies of the viscous debris flows in Jiangjia Gully fell within the range 5-13 Hz. During the propagation of debris flows, the amplitude of air pressure in Houyenshan was generally greater than 1.0 Pa, and the ground velocity greater than 0.2 mm/s. The Hilbert-Huang transform approach is adopted to analyze the non-stationary acoustic signals of the debris flows. Stony-type debris flows tend to occur in Houyenshan, Taiwan, once the total rainfall exceeds 67mm preceded by heavy hourly rainfall.
KeywordInfrasound Geophones Debris Flows Houyenshan Hilbert-huang Transform Rainfall
WOS HeadingsScience & Technology ; Technology
DOI10.1080/02533839.2012.730269
WOS Subject ExtendedEngineering
Indexed BySCI
WOS KeywordDURATION
Language英语
WOS SubjectEngineering, Multidisciplinary
WOS IDWOS:000318160600005
Funding OrganizationNational Science Council, Taiwan, ROC(NSC 96-2625-Z-008-008MY)
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5463
Collection山地灾害与地表过程重点实验室
Affiliation1.Natl Cent Univ, Dept Civil Engn, Chungli 32054, Taiwan
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
3.Minist Water Resources, Chengdu, Peoples R China
Recommended Citation
GB/T 7714
Chou, Hsien-Ter,Chang, Yu-Lung,Zhang, Shu-Cheng. Acoustic signals and geophone response of rainfall-induced debris flows[J]. JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS,2013,36(3):335-347.
APA Chou, Hsien-Ter,Chang, Yu-Lung,&Zhang, Shu-Cheng.(2013).Acoustic signals and geophone response of rainfall-induced debris flows.JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS,36(3),335-347.
MLA Chou, Hsien-Ter,et al."Acoustic signals and geophone response of rainfall-induced debris flows".JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS 36.3(2013):335-347.
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