BERMS
A narrow path or ledge at the edge of a slope, road, or canal.
Used for:
Berms prevent off-site sedimentation by diverting runoff to a sediment trapping device
and can also be used to divert clean water from entering a disturbed
area. They can also trap sediment by ponding and settling out sheet flow
runoff, or by filtering sediment as runoff passes through permeable
berms.
A berm is a ridge or barrier constructed of compacted soil, gravel, rocks, and stones to prevent, divert, or direct water away from a particular area.
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