name |
Text of up to 10 characters. Blanks are not allowed. This is in order to preserve the tabular printout, which can be read back into the program. |
Q# |
Flow in section. This can reference a flow computed on a "Qcia" line. |
D |
Depth of section. |
nLft |
Left side slope, "n" horizontal for every 1 vertical. A zero indicates a vertical side. |
nRt |
Right side slope, "n" horizontal for every 1 vertical. A zero indicates a vertical side. |
b |
Base width for rectangular or trapezoidal sections. |
S |
Slope of the pipe. If inverts and length are given, this value will be computed. |
n |
Manning's roughness coefficient. Suggested values are given with the Open Channel formulas. As a quick reminder, Earth n = 0.03, n = 0.05 for VDOT EC-2 where V < 4fps, and EC-3 Type A where V = 4-7fps, and Type B where V = 7-10fps (VDOT DM 7.4.6.3.1) |
This section is a versatile generic channel, which can be used for most ditches, and for boxes (not flowing full).