Publication Date:
2011-08-12
Description:
The catastrophic Xiaolin landslide occurred on Aug. 9, 2009, after Typhoon Morakot struck Taiwan. This landslide formed a dam that subsequently breached, burying and flooding the village of Xiaolin. Seismic signals were induced by the landslide and dam breaching and recorded at the Jiaxian broadband seismic station in Taiwan. The time-frequency spectra for the data from this station were analyzed to extract the seismic characteristics of the landslide and to deduce the timing of processes associated with the landslide dam–break flooding. The duration of the river blockage, the time of the dam-breach, the duration of the surge wave and the mean speed of the surge wave were estimated, and the hydrological implications of the flood behavior were interpreted. The spectral characteristics of the different stream discharges were also studied. Stream water level/discharge is closely related to the frequency of the seismic signals. The broadband stations are particularly useful for flood monitoring due to their ability to continuously record measurements and their high sensitivity. Copyright © 2011 John Wiley & Sons, Ltd.
Print ISSN:
0885-6087
Electronic ISSN:
1099-1085
Topics:
Architecture, Civil Engineering, Surveying
,
Geography
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