World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Formation Time and Mean Movement Velocities of the 7 August Zhouqu Debris Flows Extracted from Broadband Seismic Records : Volume 3, Issue 1 (22/01/2015)

By Li, Z.

Click here to view

Book Id: WPLBN0004019485
Format Type: PDF Article :
File Size: Pages 21
Reproduction Date: 2015

Title: Formation Time and Mean Movement Velocities of the 7 August Zhouqu Debris Flows Extracted from Broadband Seismic Records : Volume 3, Issue 1 (22/01/2015)  
Author: Li, Z.
Volume: Vol. 3, Issue 1
Language: English
Subject: Science, Natural, Hazards
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Li, Z., Xu, Q., Huang, X., Hao, Z., Fan, J., Qiao, X., & Yu, D. (2015). Formation Time and Mean Movement Velocities of the 7 August Zhouqu Debris Flows Extracted from Broadband Seismic Records : Volume 3, Issue 1 (22/01/2015). Retrieved from http://worldlibrary.in/


Description
Description: China Earthquake Networks Center, Beijing, 100045, China. The catastrophic Zhouqu debris flows, which were induced by heavy rainfall, occurred at approximately midnight of 7 August 2010 (Beijing time, UTC + 8) and claimed 1765 lives. Broadband seismic signals recorded by the Zhouqu seismic station nearby are acquired and analyzed in this paper. The seismic signals are divided into two separate parts for the first time using the crucial time of 23:33:10 (Bejing time, UTC +8), with distinctly different frequency characteristics on time-by-time normalized spectrograms and amplitude increasing patterns on smoothed envelopes. They are considered to be generated by the development stage and the maturity stage of the Sanyanyu debris flow respectively. Seismic signals corresponding to the development stage have a broader main frequency band of approximately 0–15 Hz than that of the maturity stage, which is around 1–10 Hz. The N–S component can detect the development stage of the debris flow about 3 min earlier than other components due to its southward flow direction. Two sub-stages within the maturity stage are recognized from best-fitted amplitude increasing velocities and the satellite image of the Sanyanyu flow path and the mean movement velocities of the Sanyanyu debris flow during these two sub-stages are estimated to be 9.2 and 9.7 m s−1 respectively.

Summary
Formation time and mean movement velocities of the 7 August Zhouqu debris flows extracted from broadband seismic records

Excerpt
Arattano, M.: On the use of seismic detectors as monitoring and warning systems for debris flows, Nat. Hazards, 20, 197–213, 1999.; Brodsky, E. E., Gordeev, E., and Kanamori, H.: Landslide basal friction as measured by seismic waves, Geophys. Res. Lett., 30, 2236, doi:10.1029/2003GL018485, 2003.; Burtin, A., Bollinger, L., Cattin, R., Vergne, J., and Nábělek, J. L.: Spatiotemporal sequence of Himalayan debris flow from analysis of high-frequency seismic noise, J. Geophys. Res.-Earth, 114, F04009, doi:10.1029/2008JF001198, 2009.; Chen, C.-H., Chao, W.-A., Wu, Y.-M., Zhao, L., Chen, Y.-G., Ho, W.-Y., Lin, T.-L., Kuo, K.-H., and Chang, J.-M.: A seismological study of landquakes using a real-time broad-band seismic network, Geophys. J. Int., 194, 885–898, 2013.; De Angelis, S., Bass, V., Hards, V., and Ryan, G.: Seismic characterization of pyroclastic flow activity at Soufrière Hills Volcano, Montserrat, 8 January 2007, Nat. Hazards Earth Syst. Sci., 7, 467–472, doi:10.5194/nhess-7-467-2007, 2007.; Deparis, J., Jongmans, D., Cotton, F., Baillet, L., Thouvenot, F., and Hantz, D.: Analysis of rock-fall and rock-fall avalanche seismograms in the French Alps, B. Seismol. Soc. Am., 98, 1781–1796, 2008.; Ekström, G. and Stark, C. P.: Simple scaling of catastrophic landslide dynamics, Science, 339, 1416–1419, 2013.; Fang, H. Y., Cai, Q. G., Li, Q. Y., Sun, L. Y., and He, J. J.: Causes and countermeasures of giant flash flood and debris flow disaster in Zhouqu County in Gansu Province on 7 August 2010, Science of Soil and Water Conservation, 8, 14–18, 2010 (in Chinese).; Feng, Z.: The seismic signatures of the 2009 Shiaolin landslide in Taiwan, Nat. Hazards Earth Syst. Sci., 11, 1559–1569, doi:10.5194/nhess-11-1559-2011, 2011.; Kao, H., Kan, C.-W., Chen, R.-Y., Chang, C.-H., Rosenberger, A., Shin, T.-C., Leu, P.-L., Kuo, K.-W., and Liang, W.-T.: Locating, monitoring, and characterizing typhoon-linduced landslides with real-time seismic signals, Landslides, 9, 557–563, 2012.; Lin, C. H., Kumagai, H., Ando, M., and Shin, T. C.: Detection of landslides and submarine slumps using broadband seismic networks, Geophys. Res. Lett., 37, L22309, doi:10.1029/2010GL044685, 2010.; Liu, C. Z., Miao, T. B., Chen, H. Q., Dong, K. J., Li, Z. H., and Li, H. J.: Basic feature and origin of the 8 × 8 mountain torrent-debris flow disaster happened in Zhouqu County, Gansu, China, Aug. 8, 2010, Geological Bulletin of China, 30, 141–150, 2011 (in Chinese).; Norris, R. D.: Seismicity of rockfalls and avalanches at three Cascade Range volcanoes: implications for seismic detection of hazardous mass movements, B. Seismol. Soc. Am., 84, 1925–1939, 1994.; Petley, D. N.: Characterizing giant landslides, Science, 339, 1395–1396, 2013.; Suriñach, E., Vilajosana, I., Khazaradze, G., Biescas, B., Furdada, G., and Vilaplana, J. M.: Seismic detection and characterization of landslides and other mass movements, Nat. Hazards Earth Syst. Sci., 5, 791–798, doi:10.5194/nhess-5-791-2005, 2005.; Takahashi, T.: Estimation of potential debris flows and their hazardous zones: soft countermeasures for a disaster, Journal of Natural Disaster Science, 3, 57–89, 1981.; Tang, C., Rengers, N., van Asch, Th. W. J., Yang, Y. H., and Wang, G. F.: Triggering conditions and depositional characteristics of a disastrous debris flow event in Zhouqu city, Gansu Province, northwestern China, Nat. Hazards Earth Syst. Sci., 11, 2903–2912, doi:10.5194/nhess-11-2903-2011, 2011.; Vilajosana, I., Suriñach, E., Abellán, A., Khazaradze, G., Garcia, D., an

 

Click To View

Additional Books


  • Analysing the Relationship Between Rainf... (by )
  • Non-linear Water Waves Generated by Impu... (by )
  • Sub-ionospheric Very Low Frequency Pertu... (by )
  • Can an Early Warning System Help Minimiz... (by )
  • Inundation Mapping – a Study Based on De... (by )
  • Landslides Triggered by the 12 January 2... (by )
  • The Value of Integrating Information fro... (by )
  • The Use of Radar in Hydrological Modelin... (by )
  • Hardware-software System for Simulating ... (by )
  • Behavior Analysis by Model Slope Experim... (by )
  • Post-fire Vegetation Recovery in Portuga... (by )
  • Analysis of Warm Season Thunderstorms Us... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.