This number represents the sheet flow time computed for each column of sheet flow data. Flow time for sheet flow is computed as:
![](GUID-8124F48D4F2845D18E313B335A8D6D4B-low.png)
|
T |
= |
Sheet flow time (hr.) |
|
n |
= |
Manning’s roughness coefficient from TR-55 table |
|
L |
= |
Flow length (ft) |
|
P2 |
= |
Two-year, 24-hour rainfall (in) |
|
Sf |
= |
Slope (ft/ft) |