Diffuse flow of runoff shall be maintained in the stream buffer dispersing concentrated flow and reestablishing vegetation.

a)

Concentrated runoff from new ditches or manmade conveyances shall be converted to diffuse flow before the runoff enters the 20-foot setback area defined in section 17-3-3, above.

b)

Periodic corrective action to restore diffuse flow shall be taken if necessary to impede the formation of erosion gullies.