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Table 4

Changes of surface velocity near piers

Shapes of bridge piersThe 10-year cycleAnnual averageLowest water level (P = 95%)
The rectangular pier Maximum flow rate 1.35 0.83 0.45 
Minimum flow rate 0.34 0.18 0.13 
Flow rate difference 1.01 0.65 0.32 
The round pier Maximum flow rate 1.42 0.85 0.46 
Minimum flow rate 0.75 0.41 0.21 
Flow rate difference 0.67 0.44 0.25 
The oval pier Maximum flow rate 1.47 0.87 0.48 
Minimum flow rate 0.82 0.48 0.27 
Flow rate difference 0.65 0.39 0.21 
Shapes of bridge piersThe 10-year cycleAnnual averageLowest water level (P = 95%)
The rectangular pier Maximum flow rate 1.35 0.83 0.45 
Minimum flow rate 0.34 0.18 0.13 
Flow rate difference 1.01 0.65 0.32 
The round pier Maximum flow rate 1.42 0.85 0.46 
Minimum flow rate 0.75 0.41 0.21 
Flow rate difference 0.67 0.44 0.25 
The oval pier Maximum flow rate 1.47 0.87 0.48 
Minimum flow rate 0.82 0.48 0.27 
Flow rate difference 0.65 0.39 0.21 
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