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Table 3

Equivalent K1 pier shape factor presented in HEC-RAS model

Pier slots/collarsSolid pierParallel slotY-slotT-slotSigma-slotFlat collarWing collar 90°Wing collar 45°Conical collar
Equivalent K1 pier shape factor 1.0 0.78 0.53 0.49 0.41 0.41 0.41 0.31 0.29 
Pier slots/collarsSolid pierParallel slotY-slotT-slotSigma-slotFlat collarWing collar 90°Wing collar 45°Conical collar
Equivalent K1 pier shape factor 1.0 0.78 0.53 0.49 0.41 0.41 0.41 0.31 0.29 
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