12-MM Culvert Q's

Runoff Calculations for Culvert: MM C-1 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
1.12
0.2
0.224
Roadway (gravel)
0.085
0.7
0.0595
Roadway paved
0
0.9
0
Totals 1.205 0.2835
C = 0.2835 (coef) / 1.205 (acres) = 0.2352697
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.2353 X 7.06 X 1.205 = 2.00151 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.2353 X 5.21 X 1.205 = 1.477035
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.2353 X 8.09 X 1.205 = 2.293515 cfs

Runoff Calculations for Culvert: MM C-2 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.27
0.2
0.054
Roadway (gravel)
0.04
0.7
0.028
Roadway paved
0
0.9
0
Totals 0.31 0.082
C = 0.082 (coef) / 0.31 (acres) = 0.2645161
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.2645 X 7.06 X 0.31 = 0.57892 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.2645 X 5.21 X 0.31 = 0.42722
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.2645 X 8.09 X 0.31 = 0.66338 cfs

Runoff Calculations for Culvert: MM C-3 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0.59
0.5
0.295
Grassland
0
0.35
0
Woodlands
1.4
0.2
0.28
Roadway (gravel)
0.088
0.7
0.0616
Roadway paved
0
0.9
0
C = 0.6366 (coef) / 2.078 (acres) = 0.3063523
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.3064 X 7.06 X 2.078 = 4.494396 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.3064 X 5.21 X 2.078 = 3.316686
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.3064 X 8.09 X 2.078 = 5.150094 cfs

Runoff Calculations for Culvert: MM C-4 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0.62
0.5
0.31
Grassland
0
0.35
0
Woodlands
1.26
0.2
0.252
Roadway (gravel)
0.88
0.7
0.616
Roadway paved
0
0.9
0
Totals 2.76 1.178
C = 1.178 (coef) / 2.76 (acres) = 0.4268116
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.4268 X 7.06 X 2.76 = 8.31668 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.4268 X 5.21 X 2.76 = 6.13738
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.4268 X 8.09 X 2.76 = 9.53002 cfs

Runoff Calculations for Culvert
Description
MM C-4A Slope 0.02
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.26
0.2
0.052
Roadway (gravel)
0.044
0.7
0.0308
Roadway paved
0
0.9
0
C = 0.0828 (coef) / 0.304 (acres) = 0.2723684
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.2724 X 7.06 X 0.304 = 0.584568 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.2724 X 5.21 X 0.304 = 0.431388
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.2724 X 8.09 X 0.304 = 0.669852 cfs

Runoff Calculations for Culvert: MM C-5 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.31
0.2
0.062
Roadway (gravel)
0.069
0.7
0.0483
Roadway paved
0
0.9
0
Totals 0.379 0.1103
C = 0.1103 (coef) / 0.379 (acres) = 0.291029
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.291 X 7.06 X 0.379 = 0.778718 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.291 X 5.21 X 0.379 = 0.574663
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.291 X 8.09 X 0.379 = 0.892327 cfs

Runoff Calculations for Culvert: MM C-6 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.38
0.2
0.076
Roadway (gravel)
0.04
0.7
0.028
Roadway paved
0
0.9
0
Totals 0.42 0.104
C = 0.104 (coef) / 0.42 (acres) = 0.247619
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.2476 X 7.06 X 0.42 = 0.73424 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.2476 X 5.21 X 0.42 = 0.54184
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.2476 X 8.09 X 0.42 = 0.84136 cfs

Runoff Calculations for Culvert: MM C-7 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0.07
0.5
0.035
Grassland
0
0.35
0
Woodlands
0.125
0.2
0.025
Roadway (gravel)
0.03
0.7
0.021
Roadway paved
0
0.9
0
Totals 0.225 0.081
C = 0.081 (coef) / 0.225 (acres) = 0.36
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.36 X 7.06 X 0.225 = 0.57186 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.36 X 5.21 X 0.225 = 0.42201
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.36 X 8.09 X 0.225 = 0.65529 cfs

Runoff Calculations for Culvert: MM C-8 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.3
0.2
0.06
Roadway (gravel)
0.039
0.7
0.0273
Roadway paved
0
0.9
0
C = 0.0873 (coef) / 0.339 (acres) = 0.2575221
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.2575 X 7.06 X 0.339 = 0.616338 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.2575 X 5.21 X 0.339 = 0.454833
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.2575 X 8.09 X 0.339 = 0.706257 cfs

Runoff Calculations for Culvert: MM C-9 Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0.03
0.5
0.015
Grassland
0
0.35
0
Woodlands
1.09
0.2
0.218
Roadway (gravel)
0.33
0.7
0.231
Roadway paved
0
0.9
0
Totals 1.45 0.464
C = 0.464 (coef) / 1.45 (acres) = 0.32
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.32 X 7.06 X 1.45 = 3.27584 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.32 X 5.21 X 1.45 = 2.41744
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.32 X 8.09 X 1.45 = 3.75376 cfs

Runoff Calculations for Culvert
Description
MM C-10 Slope 0.02
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.11
0.2
0.022
Roadway (gravel)
0.039
0.7
0.0273
Roadway paved
0
0.9
0
C = 0.0493 (coef) / 0.149 (acres) = 0.3308725
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.3309 X 7.06 X 0.149 = 0.348058 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.3309 X 5.21 X 0.149 = 0.256853
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.3309 X 8.09 X 0.149 = 0.398837 cfs

Runoff Calculations for Culvert
Description
MM C-11 Slope 0.02
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.3
0.2
0.06
Roadway (gravel)
0.072
0.7
0.0504
Roadway paved
0
0.9
0
Totals 0.372 0.1104
C = 0.1104 (coef) / 0.372 (acres) = 0.2967742
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.2968 X 7.06 X 0.372 = 0.779424 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.2968 X 5.21 X 0.372 = 0.575184
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.2968 X 8.09 X 0.372 = 0.893136 cfs

Runoff Calculations for Culvert
Description
MM C-12 Slope 0.02
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.12
0.2
0.024
Roadway (gravel)
0.05
0.7
0.035
Roadway paved
0
0.9
0
Totals 0.17
C = 0.059 (coef) / 0.17 (acres) = 0.3470588
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.3471 X 7.06 X 0.17 = 0.41654 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.3471 X 5.21 X 0.17 = 0.30739
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.3471 X 8.09 X 0.17 = 0.47731 cfs
ADIM01

Runoff Calculations for Culvert
Description
MM C-13 Slope 0.02
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0.275
0.2
0.055
Roadway (gravel)
0.085
0.7
0.0595
Roadway paved
0
0.9
0
Totals 0.36 0.1145
C = 0.1145 (coef) / 0.36 (acres) = 0.3180556
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = 0.3181 X 7.06 X 0.36 = 0.80837 cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = 0.3181 X 5.21 X 0.36 = 0.596545
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = 0.3181 X 8.09 X 0.36 = 0.926305 cfs

Runoff Calculations for Culvert: MM Slope 0.02
Description
Acres C-Value Coef.
Bare Sandy Soil (level)
0
0.45
0
Bare Soil(sloping)
0
0.5
0
Grassland
0
0.35
0
Woodlands
0
0.2
0
Roadway (gravel)
0
0.7
0
Roadway paved
0
0.9
0
Totals 0 0
C = 0 (coef) / 0 (acres) = #DIV/0!
i = Rainfall Intensity for 10 year, 1 day storm = 7.06 inches
Q = (C)(i)(A) = #DIV/0! X 7.06 X 0 = #DIV/0! cfs
i = Rainfall Intensity for 2 year, 1 day storm = 5.21 inches
Q = (C)(i)(A) = #DIV/0! X 5.21 X 0 = #DIV/0!
i = Rainfall Intensity for 25 year, 1 day storm = 8.09 inches
Q = (C)(i)(A) = #DIV/0! X 8.09 X 0 = #DIV/0! cfs