20090977 Ver 1_Stormwater Info_20090922

Stormwater Management
For
Loparex
Eden, NC
September 2009
r.. i l
9-A2 -07
',!lrlllll Yi l119
Prepared by:
Odom
&Associates
E) 1'_Yllicer] 11g, 111C.
152 Fast Main Street, Forest Cite, 1NiC 28043
[phone] 1=ax [phone]
INDEX
1. TSS Removal Calculations
2. 1-year, Pre Development Hydrograph
3. 10-year, Pre Development Hydrograph
4. 25-year, Pre Development Hydrograph
5. 1-year, Post Development Hydrograph
6. 10-year, Post Development Hydrograph
7. 25-year, Post Development Hydrograph
8. Channel Flow, 1-year Post Development
9. Channel Flow, 10-year Post Development
10. Channel Flow, 25-year Post Development
11. 1-year, Post Development Routed Hydrograph
12. 10-year, Post Development Routed Hydrograph
13. 25-year, Post Development Routed Hydrograph
14. 1" Runoff for Volume Calculations
15. Basin Data
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Hydrograph Plot
Hydraflow Hydrographs by Intelisolve
Hyd. No. 1
PRE CONST,
Hydrograph type = Rational
Storm frequency = 1 yrs
Drainage area = 1.200 ac
Intensity = 3.514 in/hr
OF Curve = GREENSBORO.IDF
Tuesday, Sep 22 2009, 11:9 AM
Peak discharge = 2.11 cfs
Time interval = 1 min
Runoff coeff. = 0.5
Tc by TR55 = 13.00 min
Asc/Rec limb fact = 111
Hydrograph Volume = 1,645 cuff
Q (cfs)
3.00
PRE CONST.
Hyd. No. 1 -- 1 Yr
2.00
1.00
o Oo
Q (cfs)
3.00
2.00
1.00
O.oo
0 5 10 15 20 25 30
Hyd No. 1 Time (min)
G
Hydrograph Plot
Hydraftow Hydrographs by Intalisolve
Hyd, No. 1
PRE CONST.
Hydrograph type = Rational
Storm frequency = 10 yrs
Drainage area = 1.200 ac
Intensity = 5.055 in/hr
OF Curve = GREENSSORO.IDF
Tuesday, Sep 22 2009, 11:10 AM
Peak discharge = 3.03 cfs
Time interval = 1 min
Runoff coeff. = 0.5
Tc by TR55 = 13.00 min
Asc/Rec limb fact = 111
Hydrograph Volume = 2,366 cult
Q (cfs)
4.00
PRE CONST.
Hyd. No. 1 -- 10 Yr
3.00
2.00
1.00
0.00 11
0
5
Hyd No. 1
10 15 20 25
Q (cfs)
4.00
3.00
2.00
1.00
1 0.00
30
Time (min)
Hydrograph Plot
Hydrafrow Hydrographs by Intelisolve Tuesday, Sep 22 2009, 11:10 AM
Hyd. No. I
PRE CONST.
Hydrograph type = Rational Peak discharge = 3.29 cfs
Storm frequency = 25 yrs Time interval = 1 min
Drainage area = 1.200 ac Runoff coeff. = 0.5
Intensity = 5.477 in/hr Tc by TR55 = 13.00 min
OF Curve = GREENSBORO.IDF Asc/Rec limb fact = 111
Hydrograph Volume = 2,5£3 tuft
Q (cfs)
4.00
PRE CONST.
Hyd. No. 1 -- 25 Yr
3.00
2.00
1.00
0.00 " '
0 5 10 15 20 25
Hyd No. 1
Q (cfs)
4.00
3.00
2.00
1.00
1 0.00
30
Time (min)
0J
Hydrograph Plot
Hydraflow f lydrographs by Intelisolve Tuesday, Sep 22 2009, 11:11 AM
Hyd. No. 2
POST
Hydrograph type = Rational Peal{ discharge = 2.28 cfs
Storm frequency = 1 yrs Time interval = 1 min
Drainage area = 1.200 ac Runoff coeff. = 0.6
Intensity = 3.173 in/hr Tc by TR55 = 16.00 min
IDF Curve = GREENSBORO,IDF Asc/Rec limb fact = 111
Hydrograph Volume = 2,193 cuft
Q (cfs)
3.00
POST
Hyd. No. 2 -- 1 Yr
2.00
1.00
0.00 -"
0 5
Hyd No. 2
Q (cfs)
3.00
2.00
1.00
i ' ' ' " ` ' 0.00
10 15 20 25 30 35
Time (min)
0
Hydrograph Plot
Hydraflow Hydrographs by Intelisolve Tuesday, Sep 22 2009, 11:11 AM
Hyd. No. 2
POST
Hydrograph type = Rational Peak discharge = 3.33 cfs
Storm frequency = 10 yrs Time interval = 1 min
Drainage area = 1.200 ac Runoff coeff. = 0,6
Intensity = 4.622 in/hr Tc by TR55 = 16.00 min
IDF Curve = GREENSBORO.IDF Asc/Rec limb fact = 111
Hydrograph Volume = 3,195 cult
Q (cfs)
4.00
POST
Hyd. No. 2 -- 10 Yr
3.00
2.00
1.00
0.00 11 1
0 5
Hyd No. 2
Q (cfs)
4.00
3.00
2.00
1.00
0.00
10 15 20 25 30 35
Time (min)

Hydrograph Plot
Hydraflow Hydrographs by [ntelisofve Tuesday, Sep 22 2009, 11:11 AM
Hyd. No. 2
POST
Hydrograph type = Rational Peak discharge = 3.62 cfs
Storm frequency = 25 yrs Time interval = 1 min
Drainage area = 1.200 ac Runoff coeff. = 0.6
Intensity = 5.022 in/hr Tc by TR55 = 16.00 min
IDF Curve = GREENSBORO.IDF ASc/Rec limb fact = 111
Hydrograph Volume = 3,471 curt
Q (cfs)
4.00
POST
Hyd. No. 2 -- 25 Yr
3.00
2.00
1.00
0.00 '
0 5
Hyd No. 2
Q (Gfs)
4.00
3.00
2.00
1.00
1 0.00
10 15 20 25 30 35
Time (rein)

tmp#6.txt
1 YEAR POST Channel calculator
Given input Data:
shape ......
solving for
Flowrate ...
Slope ...
Manning's n
Height .
Bottom width
Left slope .
Right slope
Trapezoidal
Depth of Flow
2.2800 cfs
0.0100 ft/ft
0.0500
12.0000 in
180.0000 in
0.2000 ft/ft (v/H)
0.2000 ft/ft (v/H)
Computed Results:
Depth 1.9936 in
velocity ........................ 0.8669 fps
Full Flowrate ................... 50.9551 cfs
Flow area ....................... 2.6300 ft2
Flow perimeter .................. 200.3309 in
Hydraulic radius ................ 1.8905 in
Top width 199.9361 in
Area ............................ 20.0000 ft2
Perimeter .................... 302.3765 in
Percent full .................... 16.6134 %
critical znformati
critical depth ..................
critical slope .................
Critical velocity ...............
Critical area ...................
critical perimeter ..............
critical hydraulic radius .......
critical top width ..............
specific energy .................
Minimum energy ..................
Froude number ...................
Flow condition ..................
on
0.0000 in
0.0000 ft/ft
0.0000 fps
0.0000 ft2
0.0000 in
0.0000 in
0.0000 in
0.0000 ft
0.0000 ft
0.0000
critical
Page 1 0
tiiip#4. txt
10 YEAR POST channel Calculator
Given Input Data:
Shape ..
solving for
Flowrate ...
slope ...
Manning's n
Height .
Bottom width
Left slope .
Right slope
Trapezoidal
Depth of Flow
3.3300 cfs
0.0100 ft/ft
0.0500
12.0000 in
180.0000 in
0.2000 ft/ft (v/H)
0.2000 ft/ft (v/H)
computed Results:
Depth .......................... 2.4948 in
velocity ........................ 0.9986 fps
Full Flowrate ................... 50.9551 cfs
Flow area ....................... 3.3346 ft2
Flow perimeter .................. 205.4418 in
Hydraulic radius ................ 2.3373 in
Top width ....................... 204.9477 in
Area ............................ 20.0000 ft2
Perimeter .................... 302.3765 in
Percent full .................... 20.7898 %
critical Informati
critical depth ..................
critical slope .................
critical velocity ...............
critical area ...................
Critical perimeter ..............
critical hydraulic radius .......
critical top width ..............
specific energy .................
Minimum energy ..................
Froude number ...................
Flow condition ..................
on
0.0000 1n
0.0000 ft/ft
0.0000 fps
0.0000 ft2
0.0000 in
0.0000 in
0.0000 in
0.0000 ft
0.0000 ft
0.0000
critical
Page 1 ?g?
tmp#5.txt
25 YEAR POST channel calculator
Given Input Data:
shape ......
solving for
Flowrate ...
slope ...
Manning`s n
Height .
Bottom width
Left slope
Right slope
Trapezoidal
Depth of Flow
3.6200 cfs
0.0100 ft/ft
0.0500
12.0000 in
180.0000 in
0.2000 ft/ft (v/H)
0.2000 ft/ft (v/H)
computed Results:
Depth 2.6209 in
velocity ........................ 1.0300 fps
Full Flowrate ................... 50.9551 cfs
Flow area ....................... 3.5147 ft2
Flow perimeter .................. 206.7282 in
Hydraulic radius ................ 2.4482 in
Top width ....................... 206.2092 in
Area 20.0000 ft2
Perimeter .................... 302.3765 in
Percent full .................... 21.8410 %
critical Informati
critical depth ..................
critical slope .................
critical velocity ...............
critical area ...................
critical perimeter ..............
Critical hydraulic radius .......
critical top width ..............
specific energy .................
Minimum energy ..................
Froude number ...................
Flow condition ..................
on
0.0000 in
0.0000 ft/ft
0.0000 fps
0.0000 ft2
0.0000 in
0.0000 in
0.0000 in
0.0000 ft
0.0000 ft
0.0000
critical
Page 1
0/0
Hydrograph Plot
Hydraflow Hydrographs by Intelisolve Tuesday, Sep 22 2009, 11:59 AM
Hyd. No. 3
ROUTED
Hydrograph type = Reservoir Peak discharge = 0.25 cfs
Storm frequency = 1 yrs Time interval = 1 min
Inflow hyd. No. = 2 Max. Elevation = 587.32 ft
Reservoir name = BASIN Max. Storage = 1,904 cuft
Storage Indication method used.
Q (cfs)
3.00
2.00
1.00
0 00
ROUTED
Hyd. No. 3 -- 1 Yr
Hydrograph Volume = 2,190 cult
Q (cfs)
3.00
2.00
1.00
0.00
0.0 0.7 1.3 2.0 2.7 3.3 4.0 4.7 5.3 6.0 6.7
Hyd No. 3 Hyd No. 2 C1 i I , I I Req. Stor = 1,904 tuft Time (hrs)
,
Hydrograph Plot
Hydraflow Hydrographs by Intelisolve Tuesday, Sep 22 2009, 11:59 AM
Hyd. No. 3
ROUTED
Hydrograph type = Reservoir Peak discharge = 0.28 cfs
Storm frequency = 10 yrs Time interval = 1 min
Inflow hyd, No. = 2 Max. Elevation = 587.71 ft
Reservoir name = BASIN Max. Storage = 2,848 tuft
Storage indication method used.
Q (cfs)
4.00
3.00
2.00
1.00
0 00
ROUTED
Hyd. No. 3 -- 10 Yr
Hydrograph Volume = 3,191 cult
Q (cfs)
4.00
3.00
2.00
1.00
0.00
0.0 0.7 1.3 2.0 2.7 3.3 4.0 4.7 5.3 6.0 6.7 7.3 8.0
- Hyd No. 3 Hyd No. 2 !! Req. Stor = 2,848 tuft Time (hrs)
1a
Hydrograph Plot
Hydrafiow Hydrographs by Intelisolve Tuesday, Sep 22 2009,11:59 AM
Hyd. No. 3
ROUTED
Hydrograph type = Reservoir Peak discharge = 0.29 cfs
Storm frequency = 25 yrs Time interval = 1 min
Inflow hyd. No. = 2 Max. Elevation = 587.82 ft
Reservoir name = BASIN Max. Storage = 8,111 cuft
Storage Indication method used.
Q (cfs)
4.00
3.00
2.00
1.00
Q (cfs)
4.00
3.00
2.00
1.00
0.00 l 0.00
0.0 0.8 1.7 2.5 3.3 4.2 5.0 5.8 6.7 7.5 8.3
Hyd No. 3 Hyd No. 2 FIT III [Ii Req. Stor = 3,111 cuft Time (hrs)
t3
ROUTED
Hyd. No. 3 -- 25 Yr
Hydrograph Volume = 3,467 cult

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