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Evaluating tsunami hazards from debris flows

By:  and 
Edited by: Rickenmann D.Chen C.L.

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Abstract

Debris flows that enter water bodies may have significant kinetic energy, some of which is transferred to water motion or waves that can impact shorelines and structures. The associated hazards depend on the location of the affected area relative to the point at which the debris flow enters the water. Three distinct regions (splash zone, near field, and far field) may be identified. Experiments demonstrate that characteristics of the near field water wave, which is the only coherent wave to emerge from the splash zone, depend primarily on debris flow volume, debris flow submerged time of motion, and water depth at the point where debris flow motion stops. Near field wave characteristics commonly may be used as & proxy source for computational tsunami propagation. This result is used to assess hazards associated with potential debris flows entering a reservoir in the northwestern USA. ?? 2003 Millpress,.

Suggested Citation

Watts, P., Walder, J.S., 2003, Evaluating tsunami hazards from debris flows, in International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings, v. 2, Davos, 10 September 2003 through 12 September 2003, p. 1245-1256.

Publication type Conference Paper
Publication Subtype Conference Paper
Title Evaluating tsunami hazards from debris flows
Volume 2
Year Published 2003
Language English
Larger Work Title International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings
First page 1245
Last page 1256
Conference Title 3rd International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
Conference Location Davos
Conference Date 10 September 2003 through 12 September 2003
Additional publication details