UFC 3-210-10
25 October 2004
Exhibit A. TR-55 Time of Concentration Calculation for Existing Condition
TIME OF CONCENTRATION AND TRAVEL TIME
Version 2.10
Project : RESIDENTIAL CASE STUDY
User:
Date: 07-11-2003
County :
State:
Checked: ____
Date: ________
Subtitle: EXISTING CONDITION
-------------------------------- Subarea #1 - 1 -------------------------------
Flow Type
2 year
Length
Slope Surface
n
Area
Wp
Velocity Time
rain
(ft)
(ft/ft)
code
(sq/ft) (ft) (ft/sec) (hr)
-------------------------------------------------------------------------------
Sheet
3
100
.02
E
0.169
Shallow Concent'd
565
.02
U
0.069
Time of Concentration = 0.24*
=====
--- Sheet Flow Surface
Codes ---
A
Smooth Surface
F Grass, Dense
--- Shallow Concentrated ---
B
Fallow (No Res.)
G Grass, Burmuda
---
Surface Codes
---
C
Cultivated < 20 % Res.
H Woods, Light
P Paved
D
Cultivated > 20 % Res.
I Woods, Dense
U Unpaved
E
Grass-Range, Short
J Range, Natural
Exhibit B. TR-55 Time of Concentration Calculation for Proposed Condition
TIME OF CONCENTRATION AND TRAVEL TIME
Version 2.10
Project : RESIDENTIAL CASE STUDY
User:
Date: 07-11-2003
County :
State:
Checked: ____
Date: ________
Subtitle: PROPOSED CONDITION
-------------------------------- Subarea #1 - 1 -------------------------------
Flow Type
2 year
Length
Slope Surface
n
Area
Wp
Velocity Time
rain
(ft)
(ft/ft)
code
(sq/ft) (ft) (ft/sec) (hr)
-------------------------------------------------------------------------------
Sheet
3
100
.02
E
0.169
Shallow Concent'd
150
.02
U
0.018
Open Channel
415
4.0
0.029
Time of Concentration = 0.22*
=====
--- Sheet Flow Surface Codes ---
A Smooth Surface
F Grass, Dense
--- Shallow Concentrated ---
B Fallow (No Res.)
G Grass, Burmuda
---
Surface Codes
---
C Cultivated < 20 % Res.
H Woods, Light
P Paved
D Cultivated > 20 % Res.
I Woods, Dense
U Unpaved
E Grass-Range, Short
J Range, Natural
90