The Effects of Bank Protection on River Morphologyby Michael D. Harvey, Water Engineering & Technology, Inc, United States,
Edward F. Sing, Water Engineering & Technology, Inc, United States,
Document Type: Proceeding Paper
Part of: Hydraulic Engineering
Revetment of bends with radius of curvature to width ratios (R/W) between 1.9 and 3.3 on Red River AR, and Sacramento River CA, does not cause the expected thalweg deepening and channel narrowing. Because revetment prevents lateral adjustment of the bend, the cross-section morphology of the bend becomes stage-dependent. During rising and peak stages the thalweg scours, the point bar accretes vertically and the cross-section shape becomes asymmetrical. With falling stages the thalweg fills and the point bar is eroded laterally to produce a shallow symmetrical cross section. At low discharges the revetment-induced changes in cross-section shape can be beneficial to a salmonid fishery (Sacramento River), but these same changes may be deterimental to navigation (Red River).
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