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Low Impact Development Pollutant Detections In Runoff From California Neighborhoods

Low Impact Development Pollutant Detections In Runoff From California Neighborhoods. Loren Oki UC Davis, Plant Sciences Darren Haver UC Cooperative Extension, Orange County Low Impact Development Conference October 6, 2010. Project Background.

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Low Impact Development Pollutant Detections In Runoff From California Neighborhoods

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  1. Low Impact DevelopmentPollutant Detections In Runoff From California Neighborhoods Loren OkiUC Davis, Plant Sciences Darren HaverUC Cooperative Extension, Orange County Low Impact Development Conference October 6, 2010

  2. Project Background Evaluating Best Management Practices (BMP) effectiveness to reduce volumes and improve quality of runoff from urban environments Funding provided by: California State Water Resources Control Board CALFED Bay-Delta Program

  3. Project Objectives Characterize runoff Single family residences Pesticides, nutrients, drinking water COCs, pathogen indicators Determine flowvolumes Develop pollutantloading models Dry and wet season Measure outreacheffects

  4. Site Selection 8 sites 4 each in Sacramento (N. Cal) and Orange (S. Cal) Counties Criteria Single family homes 4-20 years old Lot size Demographics

  5. Sampling Schedule Water Sample Collection • Sampling by Master Gardeners in Sac Co • Up to 5 early storms of each season

  6. Continuous Data Collection Flows (depth & velocity) Temperature pH Electrical conductivity Rainfall Automated StormwaterSampling Remote Communication Monitoring Photos: L.Oki

  7. Continuous Data Collection Flows (depth & velocity) Temperature pH Electrical conductivity Rainfall Automated StormwaterSampling Remote Communication Monitoring Photos: L.Oki

  8. Water Sample Collection UC Cooperative ExtensionMaster Gardeners Photos: L.Oki

  9. Analyses of Water Samples UC Riverside Gan Lab Nutrients Nitrate, TKN, Phosphate, Total P Pesticides diazinon, chlorpyrifos, pyrethroids (9), fipronil Drinking Water COCs TOC, DOC, Brˉ, Clˉ, TDS, TSS, turbidity Yates Lab Pathogen indicatorsE. coliTotal coliforms Somatic coliphages Male-specific coliphages EnterococciClostridium perfringens PathogensGiardia Cryptosporidium

  10. Pesticide Detection Frequency Sacramento County As reported Sep 18, 2008 Detection limit= 0.5 ng/L n=62 Fipronil Pyrethroids % Detection OPs

  11. Pesticide Detection Frequency Sacramento County Orange County n=56 n=52 % Detection n=49 n=62 Fipronil Pyrethroids % Detection OPs

  12. Bifenthrin Concentration- S Cal S2 nn=70 ns= 9 300

  13. Bifenthrin Concentration- S Cal 300 300 S2 S1 nn=60 ns= 9 nn=70 ns= 9 300 300 S3 S4 nn=69 ns= 9 nn=60 ns= 9 Graphics: E. Lee

  14. Bifenthrin Concentration- N Cal 150 150 nn = 80 ns = 11 N2 F1 N1 F2 nn = 84 ns = 11 150 150 nn = 70 ns = 7 nn = 77 ns = 11 N3 N4 Nat

  15. Intensive Dry Weather Sampling Dry weather grab sampling N. California- Tuesdays, 11:00-2:00 S. California- Wednesdays, 7:00-11:00 Hourly sampling for 7 days S. California Site June 16– 23, 2008 N. California Site July 23-30, 2008

  16. Sample Collection & Analyses 12 sample composite 3 sample composite DiazinonChlorpyrifos Fipronil BifenthrinFenpropathrinL-Cyhalothrincis-Permethrintrans-PermethrinCyfluthrinEsfenvalerateDeltamethrin TOC TSS Nitrate Orthophosphate pH EC Turbidity 1 grab sample every 24 hrs for biologicals

  17. Sacramento County Location

  18. Synthetic Pyrethroids Bifenthrin Southern California Northern California

  19. Fipronil Southern California Northern California 2,884.5 ppt

  20. Dry season runoff patterns TueJuly 1 WedJuly 2 ThuJuly 3 FriJuly 4 SatJuly 5 SunJuly 6 MonJuly 7 Water Depth (cm) Time of Day Daily Periodicity Graphics: L. Oki

  21. Dry season runoff patterns Daily Periodicity TueJuly 1 WedJuly 2 ThuJuly 3 FriJuly 4 SatJuly 5 SunJuly 6 MonJuly 7 Water Depth (cm) Time of Day Graphics: L. Oki

  22. 4 Test neighborhoods Current county land useLow & Very Low Density 50-year projected land use Wet & Dry seasons Pollutant Loading Model Multi-Scale Graphics: A. Manfree

  23. Graphics: A. Manfree Pollutant Load ModelingLow & Very Low Density Residential Zones

  24. Storm and Non-storm RunoffLow and Very Low Density Residential Land Use Sacramento County 38,680 acre-ft 181,911 acre-ft Graphics: A. Manfree

  25. Thank you lroki@ucdavis.edu dlhaver@ucdavis.edu

  26. Site Selection Storm drain maps Locate outfalls Delineate drainshed Identify lots Verify land use Visit outfalls Safe access

  27. Orange County Location

  28. Evaluating Outreach Methods UC Master Gardener Advanced Training • Project outline • Controlled experiments • Residential landscape studies • Load estimation • Economic evaluation of BMP effectiveness • Outreach of results • Local, statewide, regional

  29. Evaluating Outreach Methods Community Activities

  30. California Center for Urban Horticulture ccuh.ucdavis.edu

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