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Adaptive Mgmt and Stakeholder Approach for Santa Clara River Nutrient TMDL

Adaptive Mgmt and Stakeholder Approach for Santa Clara River Nutrient TMDL. Prof. Arturo A. Keller. Santa Clara River Watershed. WARMF Model Implementation. LA Regional Water Quality Control Board LA County Sanitation District LA County Dept Public Works City of Santa Paula

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Adaptive Mgmt and Stakeholder Approach for Santa Clara River Nutrient TMDL

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  1. Adaptive Mgmt and Stakeholder Approach for Santa Clara River Nutrient TMDL Prof. Arturo A. Keller

  2. Santa Clara River Watershed WARMF Model Implementation

  3. LA Regional Water Quality Control Board LA County Sanitation District LA County Dept Public Works City of Santa Paula City of Fillmore City of Santa Clarita Newhall Land and Farming Coastal Conservancy Friends of Santa Clara River Ventura County Farm Bureau Ventura County Flood Control Ventura County Supervisor Kathy Long CA Dept Water Resources United Water Conservation District Steering Committee

  4. Beneficial Uses of Santa Clara River • Agriculture • Groundwater recharge • Warm and cold fish habitat • Wildlife habitat (including wetlands) • Recreational (fishing, wading) • Industrial Uses

  5. Sources of Nutrients Fertilizer application Atmospheric Deposition Groundwater irrigation Septic systems Livestock & manure Treated wastewater

  6. Point Sources of Nutrients • Santa Paula Wastewater Treatment Plant • Fillmore Wastewater Treatment Plant • Valencia Wastewater Treatment Plant • Saugus Wastewater Treatment Plant • A few small sources with NPDES permits

  7. Problem areas • Upper watershed • Ammonia & nitrate/nitrite • Low dissolved oxygen, organic enrichment • Lower watershed • Ammonia levels high in • Nitrate/nitrite levels high in

  8. Problem areas

  9. Problem areas

  10. Problem areas

  11. Problem areas

  12. Sources of Nutrients 1600 Fertilization Atmospheric Deposition 1400 Well Pumping Irrigation Diversion Recharge/Irrigation 1200 Septic Systems Groundwater Discharges Diversions 1000 Direct Point Sources Loading, kg/d Dam Release 800 600 400 200 0 Ammonia Nitrite Nitrate Upper watershed above West Pier Hwy 99

  13. Sources of Nutrients 900 Fertilization 800 Atmospheric Deposition Well Pumping Irrigation 700 Diversion Recharge/Irrigation Septic Systems Groundwater Discharges 600 Diversions Direct Point Sources Loading, kg/d 500 Dam Release 400 300 200 100 0 Ammonia Nitrite Nitrate Blue Cut Station to West Pier Hwy 99

  14. Sources of Nutrients 1200 Fertilization Atmospheric Deposition 1000 Well Pumping Irrigation Diversion Recharge/Irrigation Septic Systems Groundwater Discharges 800 Diversions Direct Point Sources Loading, kg/d Dam Release 600 400 200 0 Ammonia Nitrite Nitrate Freeman Diversion to Timber Canyon

  15. Sources of Nutrients

  16. Sources of Nutrients

  17. Linking Sources to Water Quality Point Non-Point Ammonia

  18. Linking Sources to Water Quality Nitrite Point Non-Point

  19. Linking Sources to Water Quality Point Non-Point Upstream/GW Nitrate

  20. Developing the TMDL

  21. Valencia WWTP: New NDN NH3 -> NO3- -> N2(g)

  22. Sensitivity Analysis

  23. Developing the TMDL

  24. Developing the TMDL

  25. Developing the TMDL

  26. Adaptive Management • Implement NDN in LACSD facilities • Complete upgrade to Santa Paula/Fillmore WWTP • Allow time (not to exceed five years from effective date of TMDL) to determine effective performance • Issue interim limits

  27. Adaptive Management • Special studies and monitoring to evaluate effectiveness of N reductions • Special studies for implementing narrative objectives for biostimulatory substances and toxicity • Special studies for Site Specific Objectives • Specific timeline and assignment for special studies

  28. Thanks for your time

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