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Local Scour Downstream of a Tunnel Outlet Structure

by Terry W. Sturm, Georgia Inst of Technology, United States,
Guido Bulgheroni, Georgia Inst of Technology, United States,



Document Type: Proceeding Paper

Part of: Soil Properties Evaluation from Centrifugal Models and Field Performance

Abstract:

The local scour downstream of two different types of outlet structures is studied in laboratory experiments with an alluvial sediment. The outlet structure terminates a hydraulic model of a diversion tunnel. Outlet structure A has a flat bottom with a vertical end sill while structure B is a ramp with a uniform adverse slope. The volume and pattern of scour development with time are measured and compared.

Subject Headings: Hydraulic structures | Hydraulic models | Tunnels | Drop structures | Scour | Structural models | Flow measurement

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