FLOOD06389

• County: Statewide
• Community: State of Colorado
• Basin: Statewide
• Title: Urban Storm Runoff Inlet Hydrograph Study - Volume 4
• Date: 5/1/1975
• Prepared By: Cheng-lung Chen
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

Table 13. A list of major rainfall events with computed values of stonn parameters for two urban highway
watersheds in the Salt Lake City area (Fletcher and Chen, 1975).

Location Date Rain 'd a b c a/be b/td 7
City, State M/D/Y Gage min. min. in.jhr.
No.
Layton, 9/ 5/72 L.I 210 51.87 24.80 1.051 1.78 0.118 0.358
Utah " 1.-2 345 28.19 11.21 0.980 2.64 0.032 0.177
" 1.-3 216 75.90 36.95 1.1'26 1.30 0.171 0.317
" IA 210 56.07 31.56 1.081 1.34 0.150 0.324
" L.5 424 33.71 22.89 1.013 ].41 0.054 0.173
L.6 207 67.72 35.23 1.11 ] 1.29 0.170 0.312
4/17/73 L.I 398 22.87 26.25 0.900 1.21 0.066 0.635
" L.2 4]3 87.76 90.00 1.090 0.65 0.218 0.904
L.3 180 297.93 106.25 1.291 0.72 0.590 0.155
" LA 555 5.58 0.82 0.673 6.37 0.001 0.009
1.-5 480 229.20 152.50 1.175 0.63 0.318 0.505
" L.6 635 43.83 47.19 0.951 1.12 0.074 0.605
5/.~5/73 L.l 10 18.53 6.13 1.067 2.68 0.613 0
!.-2 30 23.37 8.87 1.073 2.25 0.196 0.430
L.3 5
L.4
L.5 10 12.00 0.00 1.000 0.00 0.000 0.500
" L.6 90 18.53 6.13 1.067 2.68 0.613 0
5/25.26/73 L.l 75 163.84 122.50 1.356 0.24 1.633 0
" L-2 65 57.30 65.31 1.217 0.355 1.005 0.894
L.3 75 29.12 47.19 1.145 0.353 0.629 0.48]
" L.4
!.-5 60 54.62 40.55 1.15& 0.755 O.67ti 0312
" L.6 75 163.84 122.50 1.~56 0.242 1.633 0
7/19/73 L.I 389 16.09 12.54 0.845 1.90 0.032 0.282
" L-2 404 42.27 43.44 0.983 1.04 O.IUS 0.311
" L.3 425 44.61 46.41 0.985 1.01 O.IlN 0.311
LA 364 28.72 21.11 0.934 1.66 0.058 a.JIR
" L.S 394 39.09 34M 0.973 1.24 0.08/; 0.296
" L.6 367 18.28 16.!:lO 0.854 1.64 0.046 0.263
Parleys, 9/ 5/77. P.I 254 15.62 17.66 0.7'JO 1.61 0.070 0.348
Utah " P.2 257 56.91 18.09 1.023 2.94 0.070 O.99lJ
" P.3 261 59.98 23.20 1.055 2.17 0.OS9 0.307
PA 128 57.42 21.37 1.087 2.06 0.167 0.641
P.5 291 33.81 ] 7.27 0.979 2.08 0.059 0.828
P.6 4]2 56.26 42.97 0.984 1.39 0.104 0.410
9/19/72 P.l 140 194.86 116.25 1.29<) 0.41 0.830 0.545
" P.2 96 57.31 51.87 ] .153 0.60 O.5..J-O 0.929
P.3 190 102.72 114.37 1.:nO 0.30 O.60~ 0.429
P.4 97 42.15 38.67 1.090 0.784 0.::9<) 0.896
P.5
1'.6
101~.5/71 P.l 253 I] 37 4.34 0.t.;90 3.0~ 0.017 0.0-+0
P.2 253 14.tJ! 2.70 O.t)25 5.()6 0.011 O.O-~-~
p-] 16~ 18.31 5.00 0.9:;ll 3.[J3 0.019 O_O-l7
P-4 210 26.92 6.4:" 1.011 4.09 U.U31 (l.O:-1-
" P.5
P.6 :'86 16.-1-3 2.1:; O.1l3,s S.OI O.UO:-; 0_0:;.:

41