Hydraulic Efficiency of Grate and Curb Inlets - Urban Drainage and ...

Test ID
Number
Configuration
Longitudinal
Slope
(%)
Cross Flow
Slope Depth
(%) (ft)
Prototype
Total
Flow
(cfs)
Efficiency
(%)
Top
Width
at
Control
(ft)
Top
Width
Downstream
115 5-ft Type R (R5), w/Horizontal Safety Bar 0.5 2 0.501 11.1 39.4 18.2 13.8
116 9-ft Type R (R9) 0.5 2 0.333 3.1 65.0 14.0 13.1
117 9-ft Type R (R9) 0.5 2 0.501 11.2 47.2 18.2 13.7
118 9-ft Type R (R9) 0.5 2 0.999 93.8 19.3 18.2 18.2
119 12-ft Type R (R12) 0.5 2 0.333 2.8 83.3 14.0 13.1
120 12-ft Type R (R12) 0.5 2 0.501 10.9 52.9 18.2 13.7
121 12-ft Type R (R12) 0.5 2 0.999 93.8 25.4 18.2 18.2
122 15-ft Type R (R15) 0.5 2 0.333 3.3 90.5 14.0 13
123 15-ft Type R (R15) 0.5 2 0.501 10.9 60.0 18.2 13.6
of
Inlets
(ft)
124 15-ft Type R (R15) 0.5 2 0.999 94.3 30.7 18.2 18.2
97