Mitigating Erosion on Slopes_Ben Burgoa

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Mitigating Erosion on Slopes_Ben Burgoa

Soil erosion =- Detachment soil particles- Transport by water


Anticipating Runoff and ong>Erosionong>


Preventing Runoff at the Source(Casale, NRCS)(4 -D)• Decrease (volume and velocity)• Detain• Dissipate• Divert


BMPs• Decrease– Row Arrangement– Cover Crop– Road Seeding– Ditch Plastic and Grass– Waterbars• Dissipate and Divert– Temporary Slope Drain and Underground Outlet• Detain– Sediment Basin


Row Arrangement


Row Arrangement(1 – 2 % slope)


Improving Water Infiltration


Exposure of baresoil can increaseerosion in slopesCover Crop


Cover Crop• Protect soil by minimizing the dislodgingimpact of rain drops (straw)• Reduce water runoff and improve waterinfiltration• Reduce soil surface crusting• Increase soil organic matter and nutrientavailability (depend on soil, temperature andranifall)


Winter Cover Crops(Cahn et al. 2008)


Cover Crop


Road Seeding


Road Seeding


Plant grass:1) on road2) on the sides of the ditch3) 10 feet up into theadjacent furrows thatdrain into the roadRoad Seeding


Maximum Number of Acres that AnnualGrassed Roads can Handle Safely


Protect Steep Roads From ong>Erosionong>Channel reinforced with plasticrequires:- Underground outlet- Sediment basin


WaterbarsHelp redirect waterfrom steeps roadsto land that cancarry or absorb thewater safely withminimal erosionSPACING:


Waterbars with bales


Temporary Slope DrainCarry concentratedrunoff from top ofslope to the base ofslopeApplicable to sites:< 10 acres drainagearea> 3 % slope


Underground Outlets


Sediment and Stormwater ControlBasins


Detention Basins• Help reduce:– Intensity (flow rate)– Sediment load• Effective when placed at the low end of a field• The basin and outlet must be correctly sizedto accommodate anticipated rate and volumeof runoff


www.rcdmonterey.org


Ben Burgoaben.burgoa@rcdmonterey.org

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