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Stillwater Creek Watershed Road Erosion Control Demonstration Water Quality Implications

Stillwater Creek Watershed Road Erosion Control Demonstration Water Quality Implications. Mike Smolen Biosystems & Agricultural Engineering Department Oklahoma State University April 13, 2006. Sediment is the number one pollutant in Oklahoma. Stillwater Creek Watershed Erosion.

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Stillwater Creek Watershed Road Erosion Control Demonstration Water Quality Implications

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  1. Stillwater Creek Watershed Road Erosion Control Demonstration Water Quality Implications Mike Smolen Biosystems & Agricultural Engineering Department Oklahoma State University April 13, 2006

  2. Sediment is the number one pollutant in Oklahoma

  3. Stillwater Creek WatershedErosion

  4. Rural Roads – paved and unpaved

  5. Erosion on unpaved rural roads

  6. Erosion from Roads and Ditches predicted by computer model From measurement: 65,000 tons/yr

  7. The Regulatory Scenario - and then the realistic situation

  8. Water samples tell tales Turbidity

  9. Water Quality Regulations • Water Quality Standards • Point and nonpoint sources • Stormwater • TMDLs

  10. Water Quality Standards • WQ Standards drive all the regulations. • Each water body has a designated beneficial use. • The WQ Standard is set to support that designated use. • The standard is violated, if the use cannot be supported • Water Quality Standards are set by the Oklahoma Water Resources Board.

  11. Designated Beneficial Uses affected by sediment • Public Drinking Water Supply • Fish and Wildlife Propagation • Primary body contact recreation • Secondary body contact recreation • Aesthetics

  12. Point Sources Discharge A point source is defined as any discharge that is carried through a pipe or man-made conveyance.

  13. Nonpoint Source Discharge Everything else. Runoff from crop fields, streets, lawns, parking lots are considered nonpoint sources.

  14. What is the difference? • Point sources can be permitted and regulated. • Nonpoint sources are not regulated. • Any control must be achieved through voluntary action. • Hence we have agricultural cost sharing programs to induce farmers to control nonpoint source pollution.

  15. Stormwater • Stormwater is a means of regulating nonpoint sources. • If runoff is captured in a pipe, channel, or other man-made conveyance, it can be considered a point source. • The stormwater permit can be used to regulate it. • Urban areas now have stormwater permits.

  16. If a Water Body does not support its designated use • A watershed study is performed. • Set a Total Maximum Daily Load (TMDL) for each pollutant from each known source. • Monitor to determine effectiveness. • Adjust all permits as appropriate.

  17. Bar ditches are man-made conveyance

  18. This is a BMP that could satisfy the permit.

  19. Will DEQ Regulate Bar Ditches? Not any time soon. But there are no guarantees in the long run.

  20. Questions?

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