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Mitigation of Pollution in Nursery Runoff J.N. Kabashima, Darren Haver, Jay Gan, and L. Wu Mitigating Pollutants in Nursery Runoff Water Proactive Participate in the process Get involved individually and as part of an industry group or association. Have data before you need it.

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mitigation of pollution in nursery runoff

Mitigation of Pollution in Nursery Runoff

J.N. Kabashima, Darren Haver, Jay Gan, and L. Wu

mitigating pollutants in nursery runoff water
Mitigating Pollutants in Nursery Runoff Water
  • Proactive
    • Participate in the process
      • Get involved individually and as part of an industry group or association.
    • Have data before you need it.
    • Help develop solutions and regulations.
    • Identify and seek sources of information and expertise.
  • Reactive
    • Try to figure out how to comply with regulations and or litigation.
mitigating pollutants in nursery runoff water3
Mitigating Pollutants in Nursery Runoff Water
  • Conduct a Self-Assessment

Runoff and NPS Self-Assessment

    • http://cesandiego.ucdavis.edu/Clean%5FWater/
  • Identify Management options

Management Options for NPS Pollution

    • http://ucce.ucdavis.edu/files/filelibrary/2017/10391.pdf
  • Document Efforts

Water Quality Record Keeping

    • http://ucce.ucdavis.edu/files/filelibrary/2017/8453.PDF
self assessment
Self-Assessment
  • Property Management
  • Road Management
  • Irrigation Practices
  • Leaching & Runoff
  • Nutrient Assessment & Fertilizer Management
  • Integrated Pest Management
management options for nps pollution greenhouse and container crop industries
Management Options for NPS Pollution Greenhouse and Container Crop Industries
  • Irrigation Management and Water Quality
  • Nutrients
  • Integrated Pest Management (IPM)
water quality record keeping
Water Quality Record Keeping
  • Sites Mats and Emergency Information
  • Hazardous Materials
  • Sanitation & Waste Management
  • Pesticide Use
  • Fertilizer Use
  • Irrigation Practices & Runoff Management
  • Equipment Maintenance
  • Best Management Practices/Mgmt Options
  • Employee Training =/Education
  • Reports, Data, & Other Information
irrigation management and water quality
Irrigation Management and Water Quality
  • Monitor Water Quality
  • Maximize Irrigation Efficiency
  • Irrigation Scheduling
  • Select Appropriate Growing Medium
  • Consider the Use of Wetting Agents
  • Reduce Leaching
  • Publications on New Technologies
  • Continuing Education
  • Collect, Treat and Recycle Open Runoff/Tailwater Recovery
  • Collect Runoff from Outdoor Production Areas
irrigation management and water quality8
Irrigation Management and Water Quality
  • Collect Runoff from Field Drains and Non-Concrete Floors
  • Further Aspects of Reusing Water
  • Erosion/Drainage Control & Water Conservation
  • Water Conservation
  • Management Practices
  • Excess Water Removal
  • Pathogen Detection and Control
  • Cost-sharing
  • Municipal Treatment Plants
irrigation management and water quality9
Irrigation Management and Water Quality
  • Maximize Irrigation Efficiency
  • Irrigation Scheduling
  • Select Appropriate Growing Medium
  • Consider the Use of Wetting Agents
  • Collect, Treat and Recycle Open Runoff/Tailwater Recovery
  • Pathogen Detection and Control
  • Continuing Education
irrigation management and water quality10

Irrigation Management and Water Quality

Maximize Irrigation Efficiency

Irrigation Scheduling

irrigation management and water quality11

Irrigation Management and Water Quality

Select Appropriate Growing Medium

Consider the Use of Wetting Agents

irrigation management and water quality12

Irrigation Management and Water Quality

Collect, Treat and Recycle Open Runoff/Tailwater Recovery

Pathogen Detection and Control

outline el modeno gardens case study
Outline – El Modeno Gardens Case Study
  • How does it happen?
    • Self-Assessment
  • What type of mitigation practices can be implemented?
    • Management Practices
how does it happen
How Does It Happen?
  • Irrigation (carrier)
  • Planting Media (source)

Runoff + planting media

= pesticide runoff?

slide19
Step 1: Scrap off surface soil

Step 2: Estimate potting mix

content

Step 3: Analyze pesticides

Step 4: Correlation

mitigation practices
Mitigation Practices
  • Reduce Irrigation Runoff
  • On-site solid removal:
    • PAM
    • In-line sediment trap
    • Collection pond
    • Vegetative filtration
    • Adsorptive filters
  • Capture and Recycle Runoff
    • Treat recaptured water
adsorption
Adsorption

DOC

Adsorbed

DOC

DOC

DOC

DOC-complex

DOC

DOC-

DOC

DOC

DOC

Dissolved

slide25
PAM Tablets

Sediment Trap

Sediment Pond

0 m

Production Area

Vegetative Filter

Adsorptive filter

104 m

145 m

166 m

187 m

210 m

Adsorptive filter

240 m

262 m (reservoir or exit)

slide26
Nursery Runoff Mitigation

PAM Delivery

Sediment Trap

Surface Runoff

Sediment Pond

Influent Sampling Point

Vegetative Filter

Baffle system

Concrete Channel

Storm Overflow

Sediment Basin

Charcoal/fiber filters

slide27
PAM (Polyacrylamides)
  • Charged (anionic) linear chain polymer with a high molecular weight.
  • Granular, liquid, or tablet.
  • Reduces the movement of soil particles as well as associated chemicals (some pesticides and nutrients).
slide29
No PAM Treatment

PAM Treatment

slide30
Sediment Trap
  • Effective in slowing flow and dropping out sediment.
  • Easy to remove deposited sediment.
  • Most effective when flow is slow and slope is less than 5%.
  • Can be utilized when space is limited.
slide32
Sediment Pond
  • Slows the movement of water entering channel.
  • Allows for the further settling of soil particles.
  • Temporary holding basin under low flow conditions.
slide34
Vegetative Filter
  • Traps sediment and reduces volume of runoff.
    • Canna x ‘Tropicanna’ – propagation
  • Removes pesticides by trapping sediment as well as providing a beneficial environment for decomposition.
  • Most effective when flow rate is slow allowing for evapotranspiration to reduce overall flow.
suspended solids in runoff mg l may 2002
Suspended Solids in Runoff (mg/L)(May 2002)

Sediment

trap

Pond

Canna lilies strip

Exit

bifenthrin in runoff ppb may 2002
Bifenthrin in Runoff (ppb)(May 2002)

92%

Sediment

trap

Pond

Canna lilies strip

Exit

permethrin in runoff ppb may 2002
Permethrin in Runoff (ppb)(May 2002)

95%

Sediment

trap

Pond

Canna lilies strip

Exit

suspended solids in runoff mg l june 2002
Suspended Solids in runoff (mg/L)(June 2002)

Sediment

trap

Pond

Canna lilies strip

Exit

bifenthrin in runoff ppb june 2002
Bifenthrin in Runoff (ppb)(June 2002)

91%

Sediment

trap

Canna lilies strip

Exit

Pond

permethrin in runoff ppb june 2002
Permethrin in Runoff (ppb)(June 2002)

100%

Sediment

trap

Pond

Canna lilies strip

Exit

slide42
Adsorptive Filters
  • Physical filtration
  • Adsorptive removal
  • Feasibility?
effectiveness of filters 1 day after
Effectiveness of Filters (1 day after)

Trap

Pond

Filter #1

Filter #2

effectiveness of filters 1 week after
Effectiveness of Filters (1 week after)

Trap

Pond

Filter #1

Filter #2

review
Disadvantages

Behavior unknown

Concentrated use

Multiple pesticides with varying properties

Advantages

Semi-point source

“Mitigatable” (small) runoff

Growers’ support

Review
  • What else?
    • Storm runoff conditions?
    • How clean is clean?
slide47
Acknowledgement

California Department of Food & Agriculture

California Department of Pesticide Regulation

California SWRCB

Santa Ana RWQCB

El Modeno Gardens Nursery

FMC Inc.

UC Water Resources Center

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