Cover | Slope Range (%)(2) | Permissible Velocity(1) | |
Erosion Resistant Soils (ft. per sec.) | Easily Eroded Soils (ft. per sec.) | ||
Cover | Slope Range (%)(2) | Permissible Velocity(1) | |
Erosion Resistant Soils (ft. per sec.) | Easily Eroded Soils (ft. per sec.) | ||
Bermuda grass | 0-5 | 8 | 6 |
5-10 | 7 | 5 | |
over 10 | 6 | 4 | |
Bahia | |||
Buffalograss | |||
Kentucky bluegrass | 0-5 | 7 | 5 |
Smooth brome | 5-10 | 6 | 4 |
Blue grama | over 10 | 5 | 3 |
Grass mixtures | (2) 0-5 | 5 | 4 |
Reed canarygrass | 5-10 | 4 | 3 |
Lespediza sericea | (3) | ||
Weeping lovegrass | 0-5 | 3.4 | 2.5 |
Yellow bluestem | |||
Redtop | |||
Alfalfa | |||
Red fescue | |||
Common lespedeza (4) | (5) | ||
Sudangrass (4) | 0-5 | 3.5 | 2.5 |
NOTES: (1) Use velocities exceeding 5 feet per second only where good covers and proper maintenance can be obtained. (2) Do not use on slopes steeper than 10% except for vegetated side slopes in combination with a stone, concrete or highly resistant vegetative center section. (3) Do not use on slopes steeper than 5% except for vegetated side slopes in combination with stone, concrete or highly resistant vegetative center section. (4) Annuals – use on mild slopes or as temporary protection until permanent covers are established. (5) Use on slopes steeper than 5% is not recommended. | |||
(Ord. 1995-10 Tab. 4, passed 10-13-1995)
* From Soil Conservation Service, SCS-TP-61, Handbook of Channel Design for Soil & Water Conservation.