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Water Quality Monitoring and Constituent Load Estimation in the Upper White River Basin, 2009

Water Quality Monitoring and Constituent Load Estimation in the Upper White River Basin, 2009. Brian Haggard Director Arkansas Water Resources Center Funding provided by ANRC through Beaver Water District. 2009 Summary Loads and Flow-Weighted Concentrations.

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Water Quality Monitoring and Constituent Load Estimation in the Upper White River Basin, 2009

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  1. Water Quality Monitoring and Constituent Load Estimation in the Upper White River Basin, 2009 Brian Haggard Director Arkansas Water Resources Center Funding provided by ANRC through Beaver Water District

  2. 2009 Summary Loads and Flow-Weighted Concentrations

  3. Water samples were collected at seven sites within UWRB War Eagle Creek Brush Creek Town Branch Richland Creek White River West Fork White River Town Branch Tributary • Stage recorded in 30 minute intervals by USGS to estimate discharge. • Water samples were collected once a week and storm events were targeted • Water samples were analyzed at the AWRC Water Quality Lab for: • Chloride • Sulfate • Nitrate-N • Ammonia-N • Soluble reactive P • Total N • Total P • Total Suspended Solids

  4. Load Determination and Mean Concentration • Linear regression was used to determine the relationship between daily load, flow, and even seasonal factors: • ln(Ld) = βo + β1ln(Qd) —or— • ln(Ld) = βo + β1ln(Qd) + β2sin(2πT) + β3cos(2πT) • BCF was used to remove bias from log transformations:

  5. Load Determination and Mean Concentration

  6. Daily loads were variable… White River

  7. Monthly loads were least during drier, summer months… White River

  8. Annual Total Nitrogen Loads White River

  9. Annual Total Phosphorus Loads White River

  10. Annual Total Suspended Solids Loads White River

  11. At UWRB… War Eagle Creek Brush Creek Town Branch Richland Creek White River West Fork White River Town Branch Tributary We looked at how loads changed across these sites We also looked at how flow-weighted concentrations changed across these sites

  12. Catchment area is related to annual phosphorus loads…

  13. But, FWC were greater from two urban and agricultural streams

  14. The monitoring program design was successful at estimating loads across these sites • This monitoring program allowed us to sample several more sites, including some urban streams • It would be possible to reduce the sampling frequency to estimate loads… • REDUCE COSTS

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