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

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Table 3-5: Test matrix for 1-ft prototype flow depth Flow Depth = 1 ft SUMP TEST ON GRADE TEST Longitudinal Slope 0.00% 0.50% 0.50% 2.00% 2.00% 4.00% 4.00% Cross Slope 1.00% 1.00% 2.00% 1.00% 2.00% 1.00% 2.00% TOTAL: Single No. 13 1 1 1 1 1 1 1 7 Single No. 13 - Curb Opening Only 1 1 1 1 4 Single No. 13 - Grate Only 1 1 1 1 4 Single No. 13 - Grate & 4-in. Curb Opening 1 1 1 1 4 Double No. 13 1 1 1 1 1 1 1 7 Triple No. 13 1 1 1 1 1 1 1 7 Single No. 16 1 1 1 1 1 1 1 7 Single No. 16 - Grate Only 1 1 1 1 4 Single No. 16 - Grate & 4-in. Curb Opening 1 1 1 1 4 Double No. 16 1 1 1 1 1 1 1 7 Triple No. 16 1 1 1 1 1 1 1 7 5-ft Type R 1 1 1 1 1 1 1 7 5-ft Type R - 4-in. Curb Opening 1 1 1 1 4 9-ft Type R 1 1 1 1 1 1 1 7 12-ft Type R 1 1 1 1 1 1 1 7 15-ft Type R 1 1 1 1 1 1 1 7 TOTAL: 16 10 16 10 16 10 16 94 No. 13 – Type 13; No. 16 – Type 16 Table 3-6: Additional sump tests (prototype scale) Flow Depth = 0.75 ft Flow Depth = 1.5 ft Longitudinal Slope 0.00% 0.00% Cross Slope 1.00% 1.00% TOTAL: Single No. 13 1 1 2 Double No. 13 1 1 2 Triple No. 13 1 1 2 Single No. 16 1 1 2 Double No. 16 1 1 2 Triple No. 16 1 1 2 TOTAL: 6 6 12 No. 13 – Type 13; No. 16 – Type 16 3.3 Inlet Construction Curb and gutter sections were fabricated from 1/8-in. thick sheet metal, and construction is shown in Figure 3-4 and Figure 3-5. Removable gutter sections for both the Type R curb inlet and the Type 13 and 16 combination inlets allowed the inlet length to be adjusted. Modular 28
construction methods were utilized to facilitate exchanging curb inlets with combination inlets, which simplified reconfiguration of the model. Construction drawings of each inlet type are presented in Appendix D. Adjustable Opening Width Removable Gutter Sections Figure 3-4: Curb inlet gutter panel during fabrication (Type R) Removable Gutter Pans Note Curb Opening Figure 3-5: Combination-inlet gutter panel during fabrication (Type 13 and 16 grates) 29
Page 1: HYDRAULIC EFFICIENCY OF GRATE AND C
Page 5 and 6: TABLE OF CONTENTS LIST OF FIGURES .
Page 7 and 8: LIST OF FIGURES Figure 1-1: Map of
Page 9 and 10: Figure 5-7: Predicted vs. observed
Page 11 and 12: LIST OF TABLES Table 2-1: Summary o
Page 13 and 14: LIST OF SYMBOLS, UNITS OF MEASURE,
Page 15 and 16: S c , Sc, cross slope cross (or lat
Page 17 and 18: ID mag meter No. QC ® R5 R9 R12 R1
Page 19 and 20: 1 INTRODUCTION A research program w
Page 21 and 22: 1-1 often require use of these thre
Page 23 and 24: 2 LITERATURE REVIEW Urban storm dra
Page 25 and 26: • All grates showed patterns of i
Page 27 and 28: Q = Q w + Q s Equation 2-1 where: 2
Page 29 and 30: Inlet Name Bar P-1-7/8 Bar P-1-7/8-
Page 31 and 32: 2.2.3 Curb Opening Inlets Curb open
Page 33 and 34: 2.3 Manning’s Equation Uniform fl
Page 35 and 36: where: q 1 = dependent parameter; q
Page 37: Q ⎛ L L Qw ⎞ = f ⎜ , ⎟ Equa
Page 40 and 41: Headbox Pipe Network Inlets Street
Page 42 and 43: capacity. A similar study performed
Page 44 and 45: Table 3-3: Test matrix for 0.33-ft
Page 48 and 49: Solid Plexiglas ® was milled to pr
Page 50 and 51: Figure 3-10: Triple No. 13 combinat
Page 52 and 53: Figure 3-16: Single No. 16 combinat
Page 54 and 55: Figure 3-22: Single No. 16 combinat
Page 56 and 57: Note Safety Bar Figure 3-28: R5 wit
Page 58 and 59: Flow entering and exiting the model
Page 60 and 61: Following a standardized testing pr
Page 63 and 64: 4 DATA AND OBSERVATIONS Testing res
Page 65 and 66: Figure 4-2: Type 16 combination-inl
Page 67 and 68: 45 40 35 Captured flow (cfs) 30 25
Page 69 and 70: 5 ANALYSIS AND RESULTS Data selecte
Page 71 and 72: likely due to the nature of the ori
Page 73 and 74: 1 Observed 0.9 0.8 0.7 0.6 0.5 0.4
Page 75 and 76: Total flow (Q) is known from the ob
Page 77 and 78: Observed 1 0.9 0.8 0.7 0.6 0.5 0.4
Page 79 and 80: 1 0.9 Observed 0.8 0.7 0.6 0.5 0.4
Page 81 and 82: The second Pi group is the square o
Page 83 and 84: Table 5-2: Empirical equations for
Page 85 and 86: Agreement is best at the smallest f
Page 87 and 88: Efficiency/base efficiency 2.2 2 1.
Page 89 and 90: were typically seen at higher flow
Page 91 and 92: Average difference in calculated ef
Page 93: Depth (ft) Table 5-3: Efficiency er
Page 96 and 97:
test data for typical design depths
Page 98 and 99:
Observed efficiency 1 0.9 0.8 0.7 0
Page 101:
7 REFERENCES Bos, M. G. (1989). Dis
Page 105 and 106:
(P-1-7/8 grate does not have the 10
Page 107 and 108:
Figure A-3: Curved vane grate (UDFC
Page 109 and 110:
Figure A-5: 30º-tilt bar grate (UD
Page 111:
APPENDIX B ON-GRADE TEST DATA 93
Page 114 and 115:
Test ID Number Configuration Table
Page 116 and 117:
Table B-3: 2% and 1% on-grade test
Page 118 and 119:
Test ID Number Configuration Longit
Page 120 and 121:
Test ID Number Configuration Table
Page 122 and 123:
Table B-7: Additional debris tests
Page 124 and 125:
106
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For the additional sump tests, only
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110
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(a) (b) Figure D-2: Type 16 inlet s
Page 132 and 133:
(a) (b) (c) Figure D-4: Type R curb
Page 134 and 135:
116
Page 136 and 137:
Extent of Flow Station (x) Position
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120
Page 140 and 141:
Test ID Number depth (ft) Tw (ft) A
Page 142 and 143:
Table F-2: Additional parameters fo
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
130
Page 150 and 151:
132
Page 152 and 153:
Plot of rstudent*pred. Legend: A =
Page 154 and 155:
The REG Procedure Model: MODEL1 Dep
Page 156 and 157:
Plot of logE*pred. Legend: A = 1 ob
Page 158 and 159:
Plot of rstudent*pred. Legend: A =
Page 160 and 161:
142
Page 162 and 163:
144
Page 164 and 165:
Test ID Number Depth (ft) Grates Fl
Page 166 and 167:
Test ID Number Depth (ft) Grates Fl
Page 168 and 169:
Test ID Number Depth Length Flow Ef
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