Accession Number:

ADA230294

Title:

Numerical Simulation of Mudflows from Hypothetical Failures of the Castle Lake Debris Blockage Near Mount St. Helens, WA

Descriptive Note:

Final project rept.

Corporate Author:

HYDROLOGIC ENGINEERING CENTER DAVIS CA

Personal Author(s):

• MacArthur, Robert C.

Report Date:

1990-10-01

Pagination or Media Count:

102.0

Abstract:

The purpose of this report was to evaluate the hydraulic characteristics of mudflow events resulting from a hypothetical failure of Castle Lake a debris blockage on the north fork of the Toutle River, caused by the Mount St. Helens eruption on 18 May 1980 and to examine the ability of a downstream sediment retention structure SRS to capture and pass such events through an emergency spillway. mm

Descriptors:

• *MATHEMATICAL MODELS
• STRUCTURAL PROPERTIES
• SPILLWAYS
• RETENTION(GENERAL)
• HYDRAULICS
• SEDIMENTS
• EMERGENCIES
• NUMERICAL ANALYSIS

Subject Categories:

• Soil Mechanics
• Civil Engineering
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE