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Glenn Gall, "Farm Scale Permaculture Water Harvesting"

Presented at the Restoring Water Cycles to Reverse Global Warming conference October 16th-18th, 2015 at Tufts University.

www.bio4climate.org

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Glenn Gall, "Farm Scale Permaculture Water Harvesting"

  1. 1. Farm Scale Permaculture Water Harvesting Slow it down Spread it out Store it Save it
  2. 2. How Much Water On Your Farm? How Many Inches of Rainfall?
  3. 3. How Much Water? How Many Inches of Rainfall? How Much Volume?
  4. 4. How Much Water? How Many Inches of Rainfall? How Much Volume? To Estimate -- 4” = ~100,000 gallons/acre 40” = ~1,000,000 gallons/acre 3 acre ft = ~1,000,000 gal.
  5. 5. How Much Water? How Many Inches of Rainfall? How Much Volume? Rain Falls On Farm? Enters From Off Farm?
  6. 6. How Much Water? How Many Inches of Rainfall? How Much Volume? On Farm? / From Off Farm? Drainage? Ponding? Porosity/Infiltration? Runoff? Flow Rates? Ground Water? Needs?
  7. 7. Rock Dams -- Trincheras, and Gabions Credit: g-a-l.info
  8. 8. Circle Ranch -- Chris Gill Erosion Damage Wide Irrigation Channels Credit: Chris Gill, circleranchtx.com
  9. 9. P A Yeomans
  10. 10. Credit: D. Doherty Broadscale Permaculture
  11. 11. Keyline Design Credit: D. Doherty Water Flows From Valley To Ridges Keyline Does The Opposite
  12. 12. Keypoints Credit: D. Doherty Draw Keyline through Keypoint. Harvest water Parallel to Keyline.
  13. 13. Keyline Design Credit: D. Doherty Water Flows From Valley To Ridges Keyline Does The Opposite
  14. 14. Savanna Lamb Ranch Credit: D. Doherty
  15. 15. Credit: D. Doherty
  16. 16. Credit: D. Doherty Filling the Pond that Wouldn't Fill
  17. 17. Yeomans Keyline Plow For Pasture Designed to “till” subsoil with minimal surface disturbance. Plow rips deep into soil. Channeling slightly downward causes water flow from valley to ridges.
  18. 18. Plow Pattern After each grazing pass or hay cutting Credit: D. Doherty
  19. 19. Circle Ranch -- Chris Gill Credit: Chris Gill, circleranchtx.com 32,000 Acres, West Texas, 12” Seasonal Rainfall
  20. 20. Keyline Agroforestry Single bottom plow or other equipment can create swales to capture water. Trees are often planted near swales, which help provide sufficient water. “Alleys” between rows can be cropped or grazed while trees grow. Credit: Mark Shepard, New Forest Farm
  21. 21. Digging a Swail The Easy Way Credit: Mark Shepard, New Forest Farm
  22. 22. Credit: Mark Shepard, New Forest Farm New Forest Farm – Neighboring Runoff NO runoff from NFF due to Swails, Berms, and Keyline Plowing
  23. 23. Versaland -- Grant Schultz 145 Acres in NE Iowa -- Government $ for:  Tree Seedlings  Tubes  Pasture/Hay Seed  Equipment  Shelter
  24. 24. Tamera
  25. 25. Diverse Cover Crops Diverse, multi-species cover crops allow for massive photosynthesis which can generate new topsoil. Gabe Brown in N.D.with only 16” rain per year has developed over five feet of topsoil at 6% organic matter. It infiltrates water at 8” per hour and does not pond, even with 13” rainfall in a day. 8 weeks with only 0.38” rainfall Gabe Brown Peter Byck, Soil Carbon Cowboys
  26. 26. Holistic Managed Grazing Pasture is dense perennial cover. Photosynthesis creates sugars which are sent to roots to feed microbes which help plants to grow and also leave carbon rich humus. This is much of the basis for topsoil. Planned grazing which avoids overgrazing and allows for sufficient rest keeps grasses healthy and grows topsoil. Gabe Brown’s Tall Grass Pasture Credit: Gabe Brown
  27. 27. Africa Center For Holistic Management Neighboring River Bed Dimbangombe Credits: ACHM
  28. 28. Dimbangombe -- New Pond Credit: Seth Itzkan
  29. 29. Which Tool To Use?
  30. 30. Which Tool To Use?
  31. 31. Farm Scale Permaculture Water Harvesting Permaculture Ethics Care of the Earth Care of People Fair Distribution
  32. 32. Farm Scale Permaculture Water Harvesting Slow it down Spread it out Store it Save it
  33. 33. Farmscale Permaculture Water Harvesting Resources P. A. Yeomans, Water for Every Farm Darren Doherty and Abe Collins, Keyline Design Mark IV Mark Shepard, Restoration Agriculture Chris Gill, www.circleranchtx.com Films: Cows and Keyline Drought Busting Sepp Holzer, Desert or Paradise Peter Byck, Film: Soil Carbon Cowboys Allan Savory, Holistic Management

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