Water harvesting
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Water harvesting

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How catching water from rooftops, dams and greenhouses for use in agriculture is done on our farm

How catching water from rooftops, dams and greenhouses for use in agriculture is done on our farm

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Water harvesting Water harvesting Presentation Transcript

  • 10,000 sq m/hect x 1.6m/year = 16,000,000 liters/hect/year
  • swales Pond 5 Pond 4 swales Pond 0 Pond 1 swales Pond 2 Pond 3 Water harvesting hardware - road swales re wa ad rd ro ha Dorms Pond 00 & ing t ho es se harv ld -h ater Orphanage ou W Pond 00 - ridge dam Pond 0 - contour dam Pond 1 - contour dam swales Pond 2 - barrier/check dam Pond 3 - keyline dam Pond 4 - saddle dam Pond 5 - ridge dam5 year Master development plan - 3 hectares - tropical - 1,600mm annual rainfall 30% pasture, 30% forest,15% water, 25% fruits/vegetables 12,000L rainwater storage
  • swales Pond 5 Pond 4 swales Pond 0 Pond 1 swales Pond 2 Pond 3 Water harvesting hardware - road Zone 3 Zone 5 Zone 4 swales re wa Zone 2 ad rd ro ha Dorms Pond 00 & ing t ho es se harv ld -h ater Orphanage ou W Pond 00 - ridge dam Pond 0 - contour dam Pond 1 - contour dam swales Pond 2 - barrier/check dam Pond 3 - keyline dam Pond 4 - saddle dam Pond 5 - ridge dam5 year Master development plan - 3 hectares - tropical - 1,600mm annual rainfall 30% pasture, 30% forest,15% water, 25% fruits/vegetables 12,000L rainwater storage
  • Key line52 m Approximate average hill profile 30 m 200 meters
  • 2012 2013 20112001 2005 Aloha House
  • Dam 1
  • Dam 1
  • Swale 1
  • Swale 2Swale 1
  • Swale 3
  • Swale 3
  • The SwaleThe best way to maximize rainwater is by slowing it down sothat it can soak into the ground.Give it the longest path on theslowest course. Water harvesting technique on contour with the land
  • Swale 3
  • Swale 3
  • The Swale Water harvesting ditch Soft mound of soil on contour with the landplanted with cover crop downhill of ditch Water harvesting technique on contour with the land
  • The Swale Water percolates through to the lower soil 2 ways
  • The Swale Swale Ditch Water percolates through to the lower soil 2 ways
  • Swale 3
  • The Swale Water percolates through to the lower soil 2 ways swale ditch
  • The Swale Water percolates through to the lower soil 2 ways
  • The Swale Water percolates through to the lower soil 2 ways
  • The Swale Water percolates throughWater provides extra to the lower soil 2 waysgrowth potential in the soil system
  • swale
  • swale
  • swale
  • Marked swale
  • Existing Pond SitePond 1
  • 10 months in drum
  • Existing Pond Site Pond 1 Swale 2 Swale 1
  • Dam Construction
  • Dam Construction Dam Failure
  • Dam Construction Dam Failure
  • Dam Construction Dam Failure
  • Dam ConstructionRemove valuabletopsoil for later use Dam Integrity
  • Dam ConstructionRemove valuabletopsoil for later use Dam Integrity
  • Dam ConstructionThe dam key is thelock in the soil thatallows a safety marginand prevents waterfrom undermining thedam dam key Dam Integrity
  • Small Barrier dam for silt collection and protection of lower dams
  • Small Barrier dam for silt collection and protection of lower dams
  • Small Barrier dam for silt collection and protection of lower dams
  • Dam ConstructionThe dam key is thelock in the soil thatallows a safety marginand prevents water Compressed soilfrom undermining thedam dam key Dam Integrity
  • Dam ConstructionThe dam key is thelock in the soil thatallows a safety marginand prevents water Compressed soilfrom undermining thedam dam key Dam Integrity
  • Dam ConstructionFreeboard is the levelabove water thatallows a safety margin Freeboardin case of a big rainevent Dam Integrity
  • Dam Construction•Replace valuabletopsoil for replantingand preventing muddywater Dam Integrity
  • Dam Construction Shade slows evaporation•Replace valuabletopsoil for replantingand preventing muddywater•Plant cover crop toprevent silt•Trees are not in dam-- to preventleaks/weakness Dam longevity
  • Existing Pond Site1. Deepen pond2. Fill old spillway3. Add swale Pond 1
  • 1. Deepen pond 2. Fill old spillway 3. Add swale w/ spillway Pond 1 old spillway swalespillway
  • swalespillway Filling The swale with a spillway tied to a dam collects water and flows it to the dam till it is full then backflows to the spill way gently releasing the rain water overflow through the spillway.
  • swale Releasingspillway The swale with a spillway tied to a dam collects water and flows it to the dam till it is full then backflows to the spill way gently releasing the rain water overflow through the spillway.
  • Pond 1
  • Pond Site Pond 1
  • 1. Remove topsoil2. Cut dam key3. Build dam4. Add swale w/ spillway Pond 2
  • Pond Site Pond 2
  • Pond 2 dam swale
  • Dam key to lock soilSmall Barrier dam for silt collection and protection of lower dams
  • Pond 2Pond 1
  • Pond 1
  • Pond 2 Pond 1
  • Pond Site Pond 2
  • Pond 2
  • Pond 1
  • Pond 2Pond 1
  • Pond 2 Pond 1
  • Wall material after top soil is removed Pond 3 Pond 2
  • Pond 3Lowest edge Dam key Baffle drain
  • Pond SitePond 3
  • Pond 3 swaleDam 2 swale
  • Dam 3 Dam 2Pond 3
  • Pond 3Dam 3
  • Pond SitePond 3
  • Road improvement for water catchment Established vetiver for erosion control
  • Road improvement for water catchment
  • Dam key to lock soil
  • Dam key to lock soil
  • Pond 3Pond 2
  • Pond 3
  • Pond 3
  • Pond 3
  • Pond 3
  • Pond 3
  • Pond 3
  • Pond 3Established vetiver for erosion control
  • Pond 3Established vetiver for erosion control
  • Water Harvesting Drain pipesDrainpipe withoutbaffles will fail Dam Integrity
  • Water Harvesting Drain pipes baffles stop leaks Drainpipe with baffles
  • Water Harvesting Drain pipes 1” drain for irrigation baffles stop leaks2” drain for irrigation Drainpipe with baffles
  • baffles stop leaks
  • Inlay drain pipe
  • Manually pack drain pipe
  • Manually pack drain pipe
  • Manually pack drain pipe
  • Manually pack drain pipe
  • Manually pack drain pipe
  • Established vetiver for erosion controlMachine pack in layers
  • Established vetiver for erosion control
  • Moving vetiver for seedling multiplicationEstablished vetiver for erosion control
  • Moving vetiver for seedling multiplicationEstablished vetiver for erosion control
  • Moving vetiver for seedling multiplicationEstablished vetiver for erosion control
  • Established vetiver for erosion control
  • contourkeyline
  • Gulley 2 Gulley 3 Gulley 4 Gulley 5 Established vetiver for erosion control
  • Banana ring
  • 6 monthsEstablished vetiver for erosion control
  • 12 monthsEstablished vetiver for erosion control
  • Established vetiver for erosion control
  • Pond SitePond 3
  • swales Pond 5 Pond 4 swales Pond 0 Pond 1 swales Pond 2 Pond 3 Water harvesting hardware - road swales re wa ad rd ro ha Pond 00 & ing t ho es se harv ld -h ater ou W Pond 00 - ridge dam Pond 0 - contour dam Pond 1 - contour dam swales Pond 2 - barrier/check dam Pond 3 - keyline dam Pond 4 - saddle dam Pond 5 - ridge dam5 year Master development plan - 3 hectares - tropical - 1,600mm annual rainfall 30% pasture, 30% forest,15% water, 25% fruits/vegetables 12,000L rainwater storage
  • Hitachi work order• Canal/road to pond 2• Pond 1 - Drain pipe w/ baffles – Cut slot – Soil goes to road• Clean up pond 1 – Soil goes to pipe slot – Extra soil to road – Improve swale from pond 2• Pond 3 clay removal – Vetiver removal – Cut key – Deep scraping and piling – Compacting – Banana rings – Swale spillway – Pond 3 - Drain pipe w/ baffles• Pond 0• Canal to rice• Pond 00 -above rice paddy• Pond 4 - Bakers