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Water Quality Monitoring for Selected Watersheds in Arkansas: Poteau, Strawberry and Upper Saline

Water Quality Monitoring for Selected Watersheds in Arkansas: Poteau, Strawberry and Upper Saline. Brian Haggard Arkansas Water Resources Center. UA Division of Agriculture Arkansas Water Resources Center. Why monitor these select watersheds?.

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Water Quality Monitoring for Selected Watersheds in Arkansas: Poteau, Strawberry and Upper Saline

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  1. Water Quality Monitoring for Selected Watersheds in Arkansas:Poteau, Strawberry and Upper Saline Brian Haggard Arkansas Water Resources Center UA Division of Agriculture Arkansas Water Resources Center

  2. Why monitor these select watersheds? • To support modeling efforts in basins with little water quality information. • Monitoring sites with USGS gages to estimate nutrient and sediment loads. • Monitoring HUC-12 outlets to better understand how water quality changes across sub-watersheds draining different land uses UA Division of Agriculture Arkansas Water Resources Center

  3. Our estimated loads will help validate the load estimations made by the model. USGS 07249400 USGS 07247000 • Poteau Watershed (HUC 11110105) UA Division of Agriculture Arkansas Water Resources Center

  4. Our estimated loads will help validate the load estimations made by the model. USGS 07074000 • Strawberry Watershed (HUC 11010012) UA Division of Agriculture Arkansas Water Resources Center

  5. Our estimated loads will help validate the load estimations made by the model. USGS 07362587 USGS 07363000 USGS 07363200 USGS 07363400 • Upper Saline Watershed (HUC 0804203) UA Division of Agriculture Arkansas Water Resources Center

  6. Water samples were collected at seven USGS gage sites across the selected watersheds. • Water samples were collected once a month during base flow conditions. • Samples were collected from a single vertical point in the stream • Rising, peak and falling flows were targeted during each storm events.

  7. Water samples were collected at seven USGS gage sites across the selected watersheds. • Stage recorded in 30 minute intervals by USGS to estimate discharge. • Water samples were analyzed at the AWRC WQL for: • Soluble Reactive P • Total P • Nitrate-N • Total N • Total Suspended Solids • Conductivity • Turbidity

  8. Loads will be calculated after all samples are collected. • Linear regression will be used to determine the relationship between daily load and daily flow: • ln(Ld) = βo + β1ln(Qd) —or— • ln(Ld) = βo + β1ln(Qd) + β2sin(2πT) + β3cos(2πT) • BCF will be used to remove bias from log transformations:

  9. Where are we with data collection in the Poteau Watershed? • 9 Base flow & • 11 Storm event USGS 07249400 USGS 07247000 • Sampling began in October 2011. • Monthly base flow and several storm events were collected through project year (June 2012). UA Division of Agriculture Arkansas Water Resources Center

  10. Where are we with data collection in the Strawberry Watershed? • Sampling began in October 2011. • Monthly base flow and several storm events were collected through project year (June 2012). • 9 Base flow & • 9 Storm event USGS 07074000 UA Division of Agriculture Arkansas Water Resources Center

  11. Where are we with data collection in the Upper Saline Watershed? • Sampling began in October 2011. • Monthly base flow and several storm events were collected through project year (June 2012). USGS 07362587 • 9 Base flow & • 5 Storm event USGS 07363000 USGS 07363200 USGS 07363400 • 9 Base flow & • 7 Storm event • 9 Base flow & • 8 Storm event UA Division of Agriculture Arkansas Water Resources Center

  12. We have less storm samples to date than anticipated… Sampling Limitations: • Less rainfall in 2012. • Proximity of locations. • We’ve missed a few storms because we didn’t know it was going to rain in other parts of the state! UA Division of Agriculture Arkansas Water Resources Center

  13. High Phosphorus Concentration Low LAND USE %Pasture and Urban Low What will we do with the data? • We can use HUC 12 data to compare measured concentrations to land use. High High Phosphorus Concentration Low LAND USE % Forest High Low UA Division of Agriculture Arkansas Water Resources Center

  14. We can also help support the development HUC-12 priorities. • Specific HUCs where management actions can be focused. • Upper Illinois River Watershed UA Division of Agriculture Arkansas Water Resources Center

  15. And compare these priorities to the SWAT Model priorities. Monitoring Modeling UA Division of Agriculture Arkansas Water Resources Center

  16. And compare these priorities to the SWAT Model priorities. UA Division of Agriculture Arkansas Water Resources Center

  17. Data to date for the Poteau…

  18. Data to date for the Strawberry…

  19. Data to date for Upper Saline…

  20. Mississippi River Basin Healthy Watershed Initiative “To improve the health of the Mississippi River Basin, including water quality and wildlife habitat, the USDA and its partners will help producers in selected watersheds in the Mississippi River Basin voluntarily implement conservation practices and systems that avoid, control, and trap nutrient runoff; improve wildlife habitat; and maintain agricultural productivity.”

  21. Where is the focus of MRBI?

  22. The areas where we are sampling all drain to the Mississippi River Basin.

  23. QUESTIONS? UA Division of Agriculture Arkansas Water Resources Center

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