Design channel linings using permissible velocity or tractive force methods. Evaluate grass, riprap, concrete, and other lining adequacy for erosion protection.
| Lining Type | n | Vmax (fps) | taumax (psf) |
|---|---|---|---|
| Bare Soil | 0.025 | 2 | 0.02 |
| Grass | 0.05 | 4 | 1 |
| Riprap | 0.04 | 14 | 4 |
| Gabion | 0.028 | 15 | 5 |
| Concrete | 0.015 | 20 | 10 |
| Class | Height | Condition |
|---|---|---|
| A | > 30 inches | Excellent stand, tall vegetation |
| B | 11-24 inches | Good stand, tall vegetation |
| C | 6-10 inches | Good stand, moderate length |
| D | 2-6 inches | Good stand, short |
| E | < 2 inches | Good stand, burned or very short |
Select lining type and enter channel parameters to check adequacy.
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