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Contraction Scour Left Channel Right Input Data Average Depth (m): 0.14 0.23 0.10 Approach Velocity (m/s): 0.72 1.43 0.59 Br Average Depth (m): 0.20 BR Opening Flow (m3/s): 2.00 BR Top WD (m): 2.46 Grain Size D50 (mm): 0.47 Approach Flow (m3/s): 0.24 1.65 0.11 Approach Top WD (m): 2.43 4.92 1.95 K1 Coefficient: 0.590 0.640 0.590 Results Scour Depth Ys (m): 1.25 Critical Velocity (m/s): Equation: Clear Combined Scour Depths