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Wednesday Plenary - Trisha Moore & Ron Graber

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North Central Region One Water Action Forum

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Wednesday Plenary - Trisha Moore & Ron Graber

  1. 1. Bridging the urban-rural divide with One Water: examples from the Little Arkansas River Watershed Trisha Moore & Ron Graber December 12, 2018
  2. 2. One watershed, many players Municipal drinking water Municipal stormwater (MS4) Agricultural runoff City of Wichita KS Dept Health & Environment Kansas State University Watershed Restoration and Protection Strategy (WRAPS) program Rural landowners One water resource: the Little Arkansas River - Drinking water source - TMDL-regulated for sediment, bacteria, nutrients, pesticides
  3. 3. Two programs aimed to unify watershed management goals 1. Driven by drinking water quality concerns & treatment costs – Primary concern: atrazine 2. Driven by stormwater MS4 permit requirements – Primary concern: sediment
  4. 4.  Little Ark WRAPS was completed in 2004  Revised Plan Addressing EPA 9 Elements in 2011  Revised Goals in 2016  Working with Little Ark producers since 2005 to implement water quality BMPs
  5. 5. Unified watershed management via drinking water program Atrazine removal from river $$$$$ $$$ Atrazine runoff prevention $
  6. 6. Managing atrazine for drinking water quality  Partnered with the city of Wichita to reduce atrazine runoff from corn and grain sorghum fields.  Education and awareness campaign with growers, pesticide dealers and crop consultants.  Targeted watersheds for rapid implementation of atrazine herbicide BMPs.  A surface water quality monitoring system was installed to evaluate the effectiveness of BMP's implemented.
  7. 7. Form Used To Calculate Incentive Payment Reduction in Atrazine BMPs Utilized (Check all that apply) Runoff Factor Incorporate atrazine into the first 2 inches of soil prior to planting .70 Apply atrazine in the fall or prior to April 15 .50 Apply atrazine as part of a postemergence premix .60 Reduce soil-applied atrazine rates based on 1.6 lb ai/acre or less -- Use split applications of atrazine, e.g. 2/3 prior to April 15 and 1/3 at planting .25 Band apply atrazine at planting .50 Use no atrazine 1.00 Establish buffer strip .25 Incorporate atrazine with ½ inch sprinkler irrigation .60 TOTAL ATRAZINE BMP RUNOFF EFFECTIVENESS (TABRE) ______ Add Reduction in Runoff Figure Incentive Payment Per Acre $6.00 (GS) or $3.00 (C) X TABRE $______
  8. 8. Summary 2006-2017  1148 growers implemented BMP’s - 91% of those contacted  218,550 acres of corn & grain sorghum implemented Atrazine BMP’s  $3.01 per acre average incentive  Using KSU effectiveness data – 49.75% reduction in atrazine runoff predicted  Actual water quality monitoring – 41.4% reduction  Annual load reduction – 840 lbs a.i. • Result of partnership among 6 key players
  9. 9. Unified watershed management via stormwater permit program Constructed pondsHydrodynamic separator
  10. 10. Economic efficiency of sediment removal in rural vs urban BMPs Little Ark Watershed Cropland BMP Effectiveness BMP $/Ton TSS, BMP life Streambank stabilization $2.30 No-Till $2.87 Conservation Tillage $2.87 Intensive Crop Rotations $4.30 Nutrient Management $4.88 Vegetative Buffers $7.17 Grassed Waterways $8.60 Ponds $13.44 Terraces $18.28 Permanent Vegetation $28.30 Cover Crops $43.01 Urban stormwater BMP Effectiveness BMP $/Ton TSS, BMP life Vegetative Buffers $475 Grass filter strip $930 Extended detention basin $2,120 Bioretention $4,440 Hydrodynamic separator $5,425 Pervious pavement $19,130
  11. 11. How do we operationalize an offsite program?
  12. 12. 2016-2018 implementation: by the numbers 354 acres (representing 69 of 118 developments) enrolled in offsite program Sediment generated from urban developments: 140 tons TSS yr-1 ~ 1590 tons TSS yr-1 offsite sediment credits enrolled (496 ac of no-till) % acres opting in offsite program % acres opting for onsite BMPs Avoided costs: $1.6M by not installing hydrodynamic separators 2:1 credit ratio
  13. 13. Keys to Success  Local Input  Trust  Education  Partnerships between the agricultural community and their urban neighbors (WRAPS)  Non-traditional marketing of BMP implementation  Flexibility  Time  Monitoring/assessment
  14. 14. Extra slides
  15. 15. Implementation Goals  Atrazine from Cropland (2006)  Sediment from Cropland (2010)  Nutrients from Cropland and Livestock  Fecal Coliform Bacteria from Livestock  Sediment and Nutrients from Streambank and Riparian Areas Implementation Goals
  16. 16. Implementation Goals  Reduce atrazine herbicide in water to reach goal of 3 µg/L, with no seasonal spikes.  Reduce fecal coliform bacteria in water to < 200 cfu/100 ml water for swimming and < 2,000 cfu/100 ml water for wading (boating and fishing).  Reduce nutrients and sediments to achieve goal of DO > 5mg/L, BOD < 3.5 mg/L, TDS < 808 mg/L and TSS < 100 mg/L in the Little Ark
  17. 17. Targeted Areas for Atrazine Targeted Areas
  18. 18. Partners  KDA - Dept. of Conservation  Ks Dept. of Health and Environment  EPA 319  City of Wichita Stormwater Advisory Board  K-State Research & Extension
  19. 19. Participation 0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 AcresinProgram/IncentivePayments($) Acres in Program Incentive Payments
  20. 20. BMP Preference 0% 10% 20% 30% 40% 50% 60% Preplant Incorporate Early Application Post Emergence Application Reduced Rate Split Application No Atrazine PercentofAcresinProgramByBMP 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
  21. 21. Paired HUC Results 0.75 1.21 1.01 2.38 1.56 0.32 1.74 1.12 1.02 0.53 2.21 2.02 2.86 4.86 2.91 0.42 2.27 1.37 1.45 1.14 0 1 2 3 4 5 6 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 AverageAtrazineConc.(ppb) BMP's No BMP's
  22. 22. Main Stem Concentrations
  23. 23. Rural and Urban Watersheds Working Together through Municipal Stormwater Permit Program
  24. 24. Intro: municipal stormwater programs  Stormwater discharge from City of Wichita, KS regulated by MS4 permit (MS4 = Municipal Separated Storm Sewer)  Permit includes requirement to address TMDLs within MS4 area  New development and redevelopment properties within Wichita required to address stormwater runoff quality Little Arkansas River Watershed City of Wichita
  25. 25. Storm Water Advisory Board  With KDHE, City of Wichita SWAB began exploring logistics of watershed-based offsite program as alternative to more traditional onsite BMP program  WHY? Potential to target BMPs in high priority areas of the watershed = greater economic and environmental efficiency Constructed ponds Hydrodynamic separator
  26. 26.  Sediment credit ratio: Required to purchase 2 offsite sediment credits for every 1 unit of sediment production onsite  Most-likely offsite BMP costa: Cost to producer to adopt AND maintain no-till with intensive crop rotations  Replacement costs: Cover cost to enroll replacement offsite BMPs if previous BMPs discontinued  Technical assistance: costs to enroll and track offsite BMPs Sediment credit fee based upon... Spreadsheet tool developed to assist City in setting sediment credit fee
  27. 27. Offsite BMPs targeted to priority subwatersheds; 5- year contact based on sediment reduction
  28. 28. Ron Graber Watershed Specialist rgraber@ksu.edu Trisha Moore Bio & Ag Engineering tlcmoore@ksu.edu

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