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 81.4% cropland 11% forested arkansaswater.org
MRBI sampling ISCO sampler set for runoff events 24 ISCO containers analyzed individually Total solids (g/time)
Measured Parameters pH Dissolved Oxygen Total Suspended Solids (TSS) Turbidity Dissolved Nitrate, Nitrite, Orthophosphate Total Nitrogen, Total Phosphorus
Ditch Number 4-Buffalo Creek Ditch Number 56 HUC#080202040806 Ditch Number 56 HUC#080202040807
Site 1 2415 2164 1714 1242
Site 2 1078 2340 1626 2520 1420
Site 3 2451 1586 1248
Site 4 2457 1686 2052
Site 5 7.5 4430 3280 1796 1746
Site 7 6.7 5.2 1510 4590 1702 3640 2200
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
Thanks to ANRC, Kyle Cassidy, students and technicians at Ecotox Questions? Thanks to ANRC, Kyle Cassidy, students and technicians at Ecotox