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

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H.1 <strong>Efficiency</strong> Determined from Empirical Equations <strong>and</strong> Improved<br />

UDFCD Methods<br />

Test ID<br />

Number<br />

Table H-1: Type 13 combination-inlet calculated efficiency<br />

Depth<br />

(ft)<br />

<strong>Grate</strong>s<br />

Flow<br />

<strong>Efficiency</strong><br />

(cfs) Observed Regression UDFCD New<br />

62 0.333 1 4.83 0.61 0.51 0.50<br />

63 0.501 1 26.19 0.24 0.21 0.30<br />

64 0.999 1 126.42 0.10 0.11 0.17<br />

91 0.333 1 2.96 0.63 0.58 0.64<br />

92 0.501 1 10.13 0.38 0.40 0.48<br />

93 0.999 1 95.09 0.13 0.13 0.22<br />

146 0.333 1 15.90 0.27 0.27 0.20<br />

147 0.501 1 33.67 0.20 0.18 0.24<br />

148 0.999 1 166.64 0.09 0.09 0.08<br />

161 0.333 1 7.79 0.50 0.39 0.36<br />

162 0.501 1 24.78 0.24 0.23 0.23<br />

163 0.999 1 155.88 0.09 0.10 0.07<br />

227 0.333 1 12.94 0.25 0.30 0.26<br />

228 0.501 1 37.72 0.13 0.17 0.21<br />

229 0.999 1 142.63 0.08 0.10 0.13<br />

242 0.333 1 9.04 0.43 0.34 0.32<br />

243 0.501 1 27.28 0.21 0.22 0.21<br />

244 0.999 1 129.69 0.09 0.11 0.13<br />

59 0.333 2 4.68 0.73 0.72 0.73<br />

60 0.501 2 22.60 0.36 0.32 0.49<br />

61 0.999 2 127.82 0.16 0.15 0.25<br />

104 0.333 2 3.27 0.62 0.75 0.84<br />

105 0.501 2 11.22 0.44 0.53 0.72<br />

106 0.999 2 98.20 0.20 0.18 0.36<br />

149 0.333 2 14.34 0.34 0.40 0.33<br />

150 0.501 2 33.67 0.24 0.25 0.34<br />

151 0.999 2 176.61 0.13 0.12 0.12<br />

158 0.333 2 8.11 0.63 0.53 0.56<br />

159 0.501 2 23.38 0.35 0.34 0.42<br />

160 0.999 2 161.34 0.14 0.13 0.14<br />

230 0.333 2 13.25 0.38 0.42 0.36<br />

231 0.501 2 36.63 0.21 0.24 0.31<br />

232 0.999 2 138.73 0.13 0.14 0.22<br />

239 0.333 2 8.26 0.66 0.51 0.55<br />

240 0.501 2 26.03 0.33 0.32 0.38<br />

241 0.999 2 127.82 0.16 0.15 0.25<br />

56 0.333 3 4.36 0.82 0.91 0.86<br />

57 0.501 3 20.58 0.43 0.41 0.67<br />

58 0.999 3 126.57 0.23 0.18 0.35<br />

145

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