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Numerical Methods for Simulating Debris Blockage Failures and Mudflows

by Robert C. MacArthur, Water Engineering & Technology, Inc, Davis, United States,
Douglas L. Hamilton, Water Engineering & Technology, Inc, Davis, United States,
Gary W. Brunner, Water Engineering & Technology, Inc, Davis, United States,



Document Type: Proceeding Paper

Part of: Structures for Enhanced Safety and Physical Security

Abstract:

This paper presents the procedures and results from an investigation to evaluate the hydraulic characteristics of mudflow events resulting from hypothetical failures of a debris blockage dam near Mount St. Helens, WA. The study purpose is to determine the most likely breaching and bulking scenarios, and then to develop procedures for routing the resulting mudflows to the Corps of Engineers' (COE) Sediment Retention Structure (SRS) which is 16 miles downstream.

Subject Headings: Numerical models | Dam failures | Numerical analysis | Landslides | Debris | Structural failures | Flood routing | Washington | United States

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