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EFFECTS OF THE MANAGEMENT OF AGRICULTURAL DRAINAGE ON GROUNDWATER

EFFECTS OF THE MANAGEMENT OF AGRICULTURAL DRAINAGE ON GROUNDWATER. AG & CONSERVATION PARTNER FORUM II June 15, 2011 Douglas W. Toews, P.E. What are the effects of Drainage Water Management (DWM) on:. the hydrologic cycle? the nitrogen cycle?. Water Balance. Water Balance.

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EFFECTS OF THE MANAGEMENT OF AGRICULTURAL DRAINAGE ON GROUNDWATER

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  1. EFFECTS OF THE MANAGEMENT OF AGRICULTURAL DRAINAGE ON GROUNDWATER AG & CONSERVATION PARTNER FORUM II June 15, 2011 Douglas W. Toews, P.E.

  2. What are the effects of Drainage Water Management (DWM) on: • the hydrologic cycle? • the nitrogen cycle?

  3. Water Balance

  4. Water Balance

  5. Nitrogen Balance

  6. Nitrogen Balance

  7. Benefits of DWM are achieved by: • minimizing drainage flows • maximizing ET • maximizing N uptake by plants • Increasing denitrification • Increasing seepage • Mitigating increased surface runoff

  8. Reference • Skaggs, Youssef, & Chescheir. 2011. Methods to estimate effects of drainage water management on annual nitrogen losses to surface waters. Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC.

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