Difference between revisions of "Recommendations for temporary stream diversion channel lining"
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Latest revision as of 15:00, 24 July 2022
Recommendations for temporary stream diversion channel lining.
Link to this table
| Lining material | Acceptable velocity range | Upstream drainage area | Design storm capacity |
|---|---|---|---|
| Erosion control blanket1 | Up to 1.5 ft/sec | Up to 1 sq. mi. | 2-year, 24-hour |
| Turf reinforcement mat (non-vegetated)2 | Up to 8.0 ft/sec | Up to 1 sq. mi. | 2-year, 24-hour |
| Geotextile (Type 1) | Up to 11 ft/sec | Up to 1 sq. mi. | 2-year, 24-hour |
| Riprap with geotextile | |||
| Average 4” (3” – 6”) | Up to 4 ft/sec | Up to 5 sq. mi. | 10-year, 24-hour |
| Average 8” (4” – 12”) | Up to 6 ft/sec | ||
| Average 14” (5” – 18”) | Up to 13 ft/sec | ||
| Plastic sheeting3 | > 13 ft/sec | Up to 2 sq. mi. | 2-year, 24-hour |
1 Only for use with intermittent, low flows. Vegetation should be established when using as a channel lining.
2 TRM with temporary seeding may be used when sufficient time is available for the diversion channel to vegetate. The acceptable velocity for vegetated TRMs should not exceed 16 ft/sec.
3 Do not use where woody and other heavy debris moves with flow. Use thicker sheeting for longer runs, or when used for more than six months.
This page was last edited on 24 July 2022, at 15:00.