20231466 Ver 1_More Info Received_20231205

12/5/23. 11:39 AM
ECMDS 7.0
NORTH
AMERICAN
GREEN
ANALYSIS COMPUTATIONS
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Inputs
Channel Discharge (Q):
95.81 cfs
Peak Flow Period (H):
hours
Channel Slope (SO):
0.0117 ft/ft
Bottom Width (B):
6 ft
Left Side Slope (ZL):
4 (H V)
Right Side Slope (ZR):
4 (H V)
Existing Channel Bend:
No
Bend Coefficient (Kb):
1
Channel Bend Radius:
Retardance Class of Vegetation:
D 2-6 in
Vegetation Type:
Bunch Type
Vegetation Density:
IFair 50-64%
Soil Type:
ILoam (MH)
Channel Lining Options
DS75 Protection Type
Temporary
S75BN Protection Type
Temporary
S75 Protection Type
Temporary
SC150BN Protection Type
Temporary
DS150 Protection Type
Temporary
S150 Protection Type
Temporary
S150BN Protection Type
Temporary
SC150 Protection Type
Temporary
C125 Protection Type
Temporary
C125BN Protection Type
Temporary
Basic Relationships
A = Cross sectional area, ft2 (m2) _ (B * D) + (ZL/ 2 * D2) + (ZR/ 2 * D2)
Where:
B = Base width of channel, ft (m)
D = Flow depth, ft (m)
ZL= Left side bank slope (H : 1 V)
ZR = Right side bank slope (H : 1 V)
P = Wetted perimeter, ft (m) = B + ZL* D + ZR* D
R = Hydraulic radius, ft (m) = A / P
V = Flow velocity, ft/s (m/s) = Q / A
Where:
Q = Channel discharge, cfs (cros)
aua Average bed shear stress, psf (Pa) = 62.4 * R * SO
Where:
SO = Gradient of channel, ft/ft (m/m)
auo= Maximum bed shear stress, psf (Pa) = 62.4 * D * So
North American Green
5401 St. Wendel -Cynthia na Rd.
Poseyville, Indiana 47633
Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
Unvegetated Conditions Computations:
https://ecmds.com/project/l 57585/channel-analysis/255904/calculations 1 /4

12/5/23, 11:39 AM
ECMDS 7.0
n = Manning's n = a * Tauab
and iteratively solved .
n = 1.486 / Q * A * R(2/3)Soo-'
Where:
n = Manning's n
a = Product specific coefficient from performance testing
b = Product specific coefficient from performance testing
SFr = Product factor of safety = TaLIT/ Tauo
Where:
TauT = Permissible shear stress from testing, psf (Pa)
aup= In place permissible shear, psf (Pa) = Taui/ alpha * (Taus+ alpha / 4.3)
Where:
alpha = unit conversion constant, 0.14 English, 6.5 Metric
Taus = Permissible shear stress of soil
SFL = Factor of safety of installed liner = Taup / Taua
Vegetated Computations:
n = Manning's n = alpha * Cn* Taua-0.4
and (iteratively solved).
n = 1.486 / Q * A * R(2/3)Soo-'
Where:
alpha = Unit conversion constant, 0.213 English, 1.0 Metric
Cn = Vegetation retardance coefficient
SFr = Product factor of safety = TauTv/ Tauo
Where:
TauTv= Permissible shear stress from testing, psf (Pa)
aup= In place permissible shear, psf (Pa) = Taus/ (1 - CFTRM) * (n / ns)2
Where:
CFTRM = Coefficient of TRM performance derived from testing Taus = Permissible shear stress of soil
ns= Manning's of soil bed if left unprotected
SFL= Factor of safety of installed liner = Taup/ Taua
C125BN
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
Phase Mannings N SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
C125BN 0.029 1.47 ft 17.44 ft2 18.11 ft 0.96 ft 5.49 ft/s 0.99 1.07 Ibs/ft2 2.61 (SFP)
Unvegetated
Underlying 0.029 1.47 ft 17.44 ft2 18.11 ft 0.96 ft 5.49 ft/s 0.99 0.7 Ibs/ft2 3.2 (SFL)
Substrate
C125
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
C125 0.031 1.53 ft 18.51 ft2 18.6 ft 1 ft 5.17 ft/s 0.91 1.12 Ibs/ft2 2.06 (SFP)
Unvegetated
Underlying 0.031 1.53 ft 18.51 ft2 18.6 ft 1 ft 5.17 ft/s 0.91 0.73 Ibs/ft2 2.55 (SFL)
Substrate
SC150
https://ecmds.com/project/l 57585/cha n nel-analysis/255904/calculations
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12/5/23, 11:39 AM
ECMDS 7.0
Predicted flow
Cross sectional
Wetted
Hydraulic
Flow velocity
Froude
Calculated Shear
Phase
Mannings N
SFP/SFL
depth (D)
area (A)
perimeter (P)
radius (R)
(V)
number (FR)
Stress
SC150 0.037
1.68 ft
21.3 ft2
19.82 ft
1.07 ft 4.5 ft/s
0.77
1.22 Ibs/ft2
1.63 (SFP)
Unvegetated
Underlying 0.037
1.68 ft
21.3 ft2
19.82 ft
1.07 ft 4.5 ft/s
0.77
0.78 Ibs/ft2
2.05 (SFL)
Substrate
S150BN
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Fronde Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
S150BN 0.036 1.65 ft 20.77 ft2 19.6 ft 1.06 ft 4.6 ft/s 0.79 1.2 Ibs/ft2 1.58 (SFP)
Unvegetated
Underlying 0.036 1.65 ft 20.77 ft2 19.6 ft 1.06 ft 4.6 ft/s 0.79 0.77 Ibs/ft2 1.97 (SFL)
Substrate
S150
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
S150 0.037 1.68 ft 21.3 ft2 19.82 ft 1.07 ft 4.5 ft/s 0.77 1.22 Ibs/ft2 1.47 (SFP)
Unvegetated
Underlying 0.037 1.68 ft 21.3 ft2 19.82 ft 1.07 ft 4.5 ft/s 0.77 0.78 Ibs/ft2 1.84 (SFL)
Substrate
DS150
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
DS150 0.037 1.68 ft 21.3 ft2 19.82 ft 1.07 ft 4.5 ft/s 0.77 1.22 Ibs/ft2 1.47 (SFP)
Unvegetated
Underlying 0.037 1.68 ft 21.3 ft2 19.82 ft 1.07 ft 4.5 ft/s 0.77 0.78 Ibs/ft2 1.84 (SFL)
Substrate
SC150BN
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
Phase Mannings N SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
SC15OBN
0.036
1.65 ft
20.77 ft2
19.6 ft
1.06 ft
4.6 ft/s
0.79
1.2 Ibs/ft2
1.66 (SFP)
Unvegetated
Underlying
0.036
1.65 ft
20.77 ft2
19.6 ft
1.06 ft
4.6 ft/s
0.79
0.77 Ibs/ft2
2.08 (SFL)
Substrate
S75
Predicted flow
Cross sectional
Wetted
Hydraulic
Flow velocity
Froude
Calculated Shear
Phase
Mannings N
SFP/SFL
depth (D)
area (A)
perimeter (P)
radius (R)
(V)
number (FR)
Stress
S75 Unvegetated
0.031
1.54 ft
18.66 ft2
18.67 ft
1 ft
5.14 ft/s
0.91
1.12 Ibs/ft2
1.43 (SFP)
Underlying
0.031
1.54 ft
18.66 ft2
18.67 ft
1 ft
5.14 ft/s
0.91
0.73 Ibs/ft2
1.76 (SFL)
Substrate
Unreinforced
Vegetation
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
Unreinforced 0.035 1.62 ft 20.21 ft2 19.35 ft 1.04 ft 4.74 ft/s 0.82 1.18 Ibs/ft2 3.38 (SFL)
Vegetation
Underlying 0.035 1.62 ft 20.21 ft2 19.35 ft 1.04 ft 4.74 ft/s 0.82 0.76 Ibs/ft2 0.94 (SFL)
Substrate
S75BN
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
S75BN 0.031 1.54 ft 18.66 ft2 18.67 ft 1 ft 5.14 ft/s 0.91 1.12 Ibs/ft2 1.43 (SFF
Unvegetated
https://ecmds.com/project/l 57585/channel-analysis/255904/calculations 3/4

12/5/23, 11:39 AM
Underlying 0.031
Substrate
DS75
ECMDS 7.0
1.54 ft 18.66 ft2 18.67 ft 1 ft 5.14 ft/s 0.91 0.73 Ibs/ft2 1.76 (SFL)
Phase Mannings N
Predicted flow Cross sectional Wetted Hydraulic Flow velocity Froude Calculated Shear
SFP/SFL
depth (D) area (A) perimeter (P) radius (R) (V) number (FR) Stress
DS75 0.031 1.54 ft 18.66 ft2 18.67 ft
Unvegetated
Underlying 0.031 1.54 ft 18.66 ft2 18.67 ft
Substrate
1 ft 5.14 ft/s 0.91 1.12 Ibs/ft2 1.43 (SFP)
1 ft 5.14 ft/s 0.91 0.73 Ibs/ft2 1.76 (SFL)
https://ecmds.com/projecU157585/cha n nel-analysis/255904/calculations
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