// CODE SNIPPET
903.5.5 Mound Widths
JUMP TO FULL CODE CHAPTER
The mound width for a bed system shall be determined by the following equation:
For SI: 1 foot = 304.8 mm.
The mound width for a trench system shall be determined by the following equation:
(Equation 9-7)
For SI: 1 foot = 304.8 mm.
where:
J = 3(D + F + G)SU
I = 3(E + F + G)SD
The upslope correction factor (SU) and the downslope correction factor (SD) shall be determined based on the slope in accordance with Table 903.5.5.
W = J + A + I (Equation 9-6)
For SI: 1 foot = 304.8 mm.
The mound width for a trench system shall be determined by the following equation:
(Equation 9-7)For SI: 1 foot = 304.8 mm.
where:
J = 3(D + F + G)SU
I = 3(E + F + G)SD
The upslope correction factor (SU) and the downslope correction factor (SD) shall be determined based on the slope in accordance with Table 903.5.5.
| SLOPE (percent) |
DOWNSLOPE CORRECTION FACTOR (SD) |
UPSLOPE CORRECTION FACTOR (SU) |
| 0 | 1 | 1 |
| 1 | 1.03 | 0.97 |
| 2 | 1.06 | 0.94 |
| 3 | 1.10 | 0.915 |
| 4 | 1.14 | 0.89 |
| 5 | 1.18 | 0.875 |
| 6 | 1.22 | 0.86 |
| 7 | 1.27 | 0.83 |
| 8 | 1.32 | 0.80 |
| 9 | 1.38 | 0.785 |
| 10 | 1.44 | 0.77 |
| 11 | 1.51 | 0.75 |
| 12 | 1.57 | 0.73 |