Critical and Supercritical Flows in two Unstable, Mountain Rivers, Toutle River System, Washington

by Andrew Simon, U.S. Geological Survey, Raleigh, United States,
J. H. Hardison, III, U.S. Geological Survey, Raleigh, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: Critical and supercritical flows are generally considered to be rare occurrences in natural river channels. This paper presents data and results pertaining to the existence of measured critical and supercritical flows at gaging stations on the North Fork Toutle River (NFT) and Toutle River main stem (TR). The data set includes 930 discharge measurements made by the staff of the U.S. Geological Survey, Cascades Volcano Observatory, between 1980 and 1989.

Subject Headings: Supercritical flow | Critical flow | River flow | River systems | Flow measurement | Fluid flow | Mountains | Streamflow | Solids flow | River bank stabilization | Washington | North America | United States

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