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Little River Ditches Watershed Monitoring Project 11-2000S

Little River Ditches Watershed Monitoring Project 11-2000S. Jennifer L. Bouldin, PhD Ecotoxicology Research Facility Arkansas State University. arkansaswater.org. Little River Ditches. Shared with MO and KY ~ 25% in AR Intensive row crop agriculture. www.epa.gov. Land Use.

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Little River Ditches Watershed Monitoring Project 11-2000S

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  1. Little River Ditches Watershed MonitoringProject 11-2000S Jennifer L. Bouldin, PhD Ecotoxicology Research Facility Arkansas State University

  2. arkansaswater.org

  3. Little River Ditches • Shared with MO and KY • ~ 25% in AR • Intensive row crop agriculture www.epa.gov

  4. Land Use • 81.4% cropland • 11% forested arkansaswater.org

  5. MRBI sampling • ISCO sampler set for runoff events • 24 ISCO containers analyzed individually • Total solids (g/time)

  6. Measured Parameters • pH • Dissolved Oxygen • Total Suspended Solids (TSS) • Turbidity • Dissolved Nitrate, Nitrite, Orthophosphate • Total Nitrogen, Total Phosphorus

  7. Ditch Number 4-Buffalo Creek • HUC#080202040806 • Ditch Number 56 • HUC#080202040807

  8. Site 1 2164 1714 2415 1242

  9. Site 2 1078 1626 2340 2520 1420

  10. Site 3 2451 1586 1248

  11. Site 4 2457 1686 2052

  12. Site 5 7.5 4430 3280 1746 1796

  13. Site 7 6.7 5.2 1510 4590 1702 3640 2200

  14. Preliminary results • High flow vs. low/no flow conditions vary nutrient and TSS values • Sediment and nutrients values much higher in primary ditches • More TSS spikes in 2013 due to rainfall • Comparison of edge-of-field data to instream data will determine direct input from field

  15. Questions? Thanks to ANRC, Kyle Cassidy, students and technicians at Ecotox

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