Geotechnical and Hydraulic Stability Numbers for Channel Rehabilitation: Part I, the Approach

by C. C. Watson, Water Engineering & Technology, Inc, United States,
M. D. Harvey, Water Engineering & Technology, Inc, United States,
D. S. Biedenharn, Water Engineering & Technology, Inc, United States,
P. Combs, Water Engineering & Technology, Inc, United States,



Document Type: Proceeding Paper

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

Abstract:

A model of incised channel evolution was developed to integrate the geotechnical and hydraulic factors that are involved in channel rehabilitation. Bank stability is attained when the bank height (h) is less than the critical bank height. Hydraulic stability at the effective discharge is attained when sediment supply and sediment transport capacity are in equilibrium. It is defined as the condition when the ratio of shear intensity at conditions of equilibrium to the shear intensity at the effective discharge is equal to or less than 1. The size and spacings of grade-control structures can be determined by satisfying conditions discussed in the paper.

Subject Headings: Sediment transport | River bank stabilization | Hydraulic models | Geotechnical engineering | Channel stabilization | Rehabilitation | Transportation engineering

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