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Monitoring and early warning of debris-flow in an earthquake impacted area, Baishahe catchment, southwest China

Tian, Hongling
; 
Yang, Zongji
; 
Qiao, Jianping
; 
Shi, Lili
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2019
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Keywords
warning system
 debris flow
 susceptibility
 monitoring
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Seventh International Conference on Debris-Flow Hazards Mitigation - Proceedings
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02-19_Tian.pdf
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https://hdl.handle.net/11124/173216
 http://dx.doi.org/10.25676/11124/173216
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Abstract
After 10 years of the Wenchuan earthquake of China, the post-seismic landslides are turning weak. However, the debris flows in earthquake-stricken area continue to be threat. In order to reduce the risk from debris flows in this region, we discuss the operation of an alert system, monitoring objectives, and early-warning policies. Three gullies in the Baishahe catchment, Dujiangyan, Southwest China were selected and rain-gauge, tilt-sensor, mud-meter and ground acoustic meter combined to a warning system in April, 2014. The data collected from these events shows changes in susceptibility levels and triggering rainfall complicating the application of a fixed rainfall threshold for any alert system.
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