Stream-Profile Analyses Using a Step-Backwater Model for ... - USGS

78 Stream-Profile Analyses Using a Step-Backwater Model for Selected Reaches in the Chippewa Creek Basin in Ohio
Table 3–3. Water-surface elevation, in feet, along Little Chippewa Creek after decreasing the Manning’s roughness coefficient (n) for
the main channel by 5, 10, 15, and 20 percent.—Continued
River
station 1
Water-surface elevation (in feet) associated with the indicated decrease in the Manning’s roughness coefficient (n)
over the entire length of the main channel
0 percent 5 percent 10 percent 15 percent 20 percent
10805
955.52
955.25
954.98
954.84
954.54
11148
955.64
955.38
955.1
954.95
954.65
11511
955.87
955.61
955.34
955.2
954.91
11540
955.88
955.62
955.35
955.21
954.91
11634
955.93
955.67
955.4
955.26
954.97
11673
955.94
955.68
955.41
955.27
954.97
11865
956.11
955.86
955.61
955.47
955.2
12065
956.18
955.93
955.68
955.54
955.26
12195
956.23
955.99
955.74
955.6
955.32
12305
956.27
956.03
955.78
955.64
955.37
12705
956.43
956.19
955.95
955.81
955.54
13024
956.57
956.33
956.09
955.96
955.69
13251
956.66
956.42
956.18
956.05
955.79
13422
956.73
956.49
956.25
956.12
955.86
13573
956.82
956.58
956.35
956.22
955.96
13916
956.97
956.73
956.5
956.37
956.12
14336
957.19
956.96
956.73
956.6
956.36
14774
957.38
957.16
956.93
956.81
956.56
15231
957.62
957.39
957.16
957.04
956.8
15507
957.78
957.55
957.33
957.21
956.97
15805
957.91
957.69
957.46
957.34
957.1
16054
958.05
957.84
957.61
957.5
957.26
16328
958.14
957.92
957.69
957.57
957.33
16697
958.42
958.2
957.98
957.86
957.62
17040
958.69
958.48
958.25
958.14
957.9
17272
958.81
958.6
958.37
958.25
958.01
17552
959.03
958.82
958.6
958.48
958.24
17835
959.22
959.01
958.8
958.68
958.44
18186
959.46
959.24
959.01
958.89
958.64
1 Referenced to feet above mouth.