Measurements of the flow and channel form of supraglacial streams, mostly perennial, on a Swiss valley glacier are analyzed for comparison with normal alluvial rivers. Channel incision depths can be explained by a simple model taking into account frictional melting and direct ablation. Stream widths are proportional to the square root of discharge. Discriminant and regression analyses support the theory that maximum sinuosities develop in streams with the highest initial rates of power expenditure per unit bed area.

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