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

B.1 On-grade Test Results
All three inlets (Types 13, 16, and R) were tested in the on-grade condition at various
slopes.
Test ID
Number
Configuration
Table B-1: 0.5% and 1% on-grade test data
Longitudinal
Slope
(%)
Cross
Slope
(%)
Flow
Depth
(ft)
Prototype
Total
Flow
(cfs)
Efficiency
(%)
Top
Width
Top Downstream
Width at
Control of Inlets
(ft) (ft)
44 15-ft Type R (R15) 0.5 1 0.333 4.4 89.3 16.0 10.2
45 15-ft Type R (R15) 0.5 1 0.501 20.3 50.8 17.5 16.0
46 15-ft Type R (R15) 0.5 1 0.999 128.8 23.6 18.2 18.2
47 12-ft Type R (R12) 0.5 1 0.333 3.9 84.0 16.0 10.0
48 12-ft Type R (R12) 0.5 1 0.501 21.8 37.9 18.2 18.2
49 12-ft Type R (R12) 0.5 1 0.999 126.3 19.5 18.2 18.2
50 9-ft Type R (R9) 0.5 1 0.333 4.2 70.4 16.0 12.0
51 9-ft Type R (R9) 0.5 1 0.501 21.5 34.8 18.2 18.2
52 9-ft Type R (R9) 0.5 1 0.999 127.8 14.5 18.2 18.2
53 5-ft Type R (R5) 0.5 1 0.333 4.4 50.0 16.0 15.6
54 5-ft Type R (R5) 0.5 1 0.501 22.3 24.5 18.2 18.2
55 5-ft Type R (R5) 0.5 1 0.999 125.5 8.3 18.2 18.2
56 Triple No. 13 0.5 1 0.333 4.4 82.1 15.8 9.0
57 Triple No. 13 0.5 1 0.501 20.6 43.2 18.2 18.2
58 Triple No. 13 0.5 1 0.999 126.6 22.7 18.2 18.2
59 Double No. 13 0.5 1 0.333 4.7 73.3 16.0 10.7
60 Double No. 13 0.5 1 0.501 22.6 35.9 18.2 18.2
61 Double No. 13 0.5 1 0.999 127.8 16.2 18.2 18.2
62 Single No. 13 0.5 1 0.333 4.8 61.3 16.0 15.8
63 Single No. 13 0.5 1 0.501 26.2 23.8 18.2 18.2
64 Single No. 13 0.5 1 0.999 126.4 9.9 18.2 18.2
65 Single No. 16 0.5 1 0.333 5.1 60.6 16.0 15.8
66 Single No. 16 0.5 1 0.501 21.4 28.5 18.2 18.2
67 Single No. 16 0.5 1 0.999 126.9 13.5 18.2 18.2
68 Double No. 16 0.5 1 0.333 5.3 70.6 17.0 12.8
69 Double No. 16 0.5 1 0.501 23.2 34.2 18.2 18.2
70 Double No. 16 0.5 1 0.999 124.7 20.9 18.2 18.2
71 Triple No. 16 0.5 1 0.333 4.5 82.8 15.7 9.0
72 Triple No. 16 0.5 1 0.501 23.7 40.1 18.2 18.2
73 Triple No. 16 0.5 1 0.999 125.8 26.9 18.2 18.2
95