August 31 - 1053 - Ehsan Ghane
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11th International Drainage Symposium August 30-September 2, 2022 Des Moines, Iowa
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August 31 - 1053 - Ehsan Ghane
- 1. Choice of Pipe Material Influences Drain Spacing and System Cost Ehsan Ghane Assistant Professor and Extension Specialist @MSUEhsanGhane
- 2. Effective Radius (Re) of a Drain Pipe • Effective radius is the radius of an imaginary pipe with a completely open wall –Effective radius accounts for entrance head loss • Dierickx (1999): Analytical Eq. • Re is used –DRAINMOD and RZWQM2 –Estimate drain spacing with Hooghoudt 2 Ghane, MSU
- 5. Two Pipe Choices: Drain Sedimentation Issue Ghane, MSU 7
- 6. Pipe Manufacturers • ADS (Michigan plant) • Baughman Tile (Ohio) • Fratco (Indiana) • Haviland Drainage (Ohio) • Prinsco (Minnesota) • Springfield Plastics (Illinois) • Timewell Drainage (Illinois) Ghane, MSU 8
- 7. Effective Radius (Re) of Pipe (Rows of Perforation) • 4-inch, 4-row regular-perf pipe –Re = 0.3 to 0.9 cm (average 0.6 cm) • 4-inch, 8-row regular-perf pipe –Re = 1.9 cm • Most important: Rows 9 Ghane, MSU
- 8. Effective Radius (Re) of Pipe • 4-inch, 4-row regular-perf pipe –Re = 0.3 to 0.9 cm (average 0.6 cm) • 4-inch, sock-wrapped pipe –Re = 5.9 cm 11 Ghane, MSU
- 9. Sand-Tank Experiment • 4-row sand-slot pipe, 8-row sand-slot pipe • Regular-perf pipe wrapped with knitted-sock envelope
- 11. With Drain Sedimentation: A Sock-Wrapped Pipe Has The Highest Drain Inflow 16 Ghane, MSU Drain inflow of a sock-wrapped pipe is 29% higher than the 4-row sand-slot pipe, when installed at 30-ft spacing and 2.5-ft depth
- 12. A Sock-Wrapped Pipe Allows For a Wider Drain Spacing 21 Ghane, MSU
- 13. Which pipe properties increase water entry into the pipe?
- 14. Myth: Higher Water Inlet Area, Higher Drain Inflow 27 Ghane, MSU
- 15. Greater Subdivision of Openings Reduces Convergence 28 Ghane, MSU
- 16. Take-Home Messages • Perforation shape and pattern affects Re • Most Important: Number of perforation rows –8-row is much better than 4-row, for same price • Second most important: Slot length –Longer, narrower slots are better than shorter, wider slots • Slot width has minimal effect • With drain sedimentation, sock-wrapped pipe is fastest • Without drain sedimentation, 8-row reg-perf pipe is fastest 34 Length Ghane, MSU
- 18. 43 3-Row Regular-Perf with Sock Ghane, MSU
- 19. Water Passed Through The Sock From All Directions Ghane, MSU 44
Notas del editor
- Explain the need
- Any type of clogging increases, and any washing out decreases the entrance resistance.
- A pipe with 4 longitudinal rows of perforations per valley, rotated 45 degrees every other valley
- FOS= 0.45 mm AOS= 0.6 mm
- For sock-wrapped, Ref was equal to the pipe radius 5.9 cm (about 2.32 in) because entrance head loss was zero. 4-row sand= 0.4 cm 8-row sand= 1.6 cm 6-inch pipe, 8-row reg-perf= 3.1 cm
- For sock-wrapped, Ref was equal to the pipe radius 5.9 cm (about 2.32 in) because entrance head loss was zero. 4-row sand= 0.4 cm 8-row sand= 1.6 cm 6-inch pipe, 8-row reg-perf= 3.1 cm
- For sock-wrapped, Ref was equal to the pipe radius 5.9 cm (about 2.32 in) because entrance head loss was zero. 4-row sand= 0.4 cm 8-row sand= 1.6 cm 6-inch pipe, 8-row reg-perf= 3.1 cm
- First, we calculated Ref using previously-developed equations of Dierickx (1999). Then, we verified them in a sand-tank experiment.
- Depth to restrictive layer 1.8 m
- Depth to restrictive layer is 5.9 ft
- Do not present for CDN. Leave for questions.
- D= 3.5 m Dd=1.25 m $0.45 vs $0.63 per foot
- Poll Title: Do not modify the notes in this section to avoid tampering with the Poll Everywhere activity. More info at polleverywhere.com/support Which pipe drains faster? https://www.polleverywhere.com/multiple_choice_polls/JSjD8YTKRgGjBJ4Dj4ADj?state=opened&flow=Default&onscreen=persist
- Poll Title: Do not modify the notes in this section to avoid tampering with the Poll Everywhere activity. More info at polleverywhere.com/support Which pipe drains faster? Both have equal water inlet area per foot. https://www.polleverywhere.com/multiple_choice_polls/RdaoRK8kBGw56bodULQ1K?state=opened&flow=Default&onscreen=persist
- Explain the need
- Present this at ASABE and IDS
- Poll Title: Do not modify the notes in this section to avoid tampering with the Poll Everywhere activity. More info at polleverywhere.com/support How does water enter the pipe? https://www.polleverywhere.com/multiple_choice_polls/MI6zG7tWsKuaed3jjmTr4?state=opened&flow=Default&onscreen=persist
- Poll Title: Do not modify the notes in this section to avoid tampering with the Poll Everywhere activity. More info at polleverywhere.com/support How does water enter the pipe? https://www.polleverywhere.com/multiple_choice_polls/9aUOcASFlGwXRYutX8W4F?state=opened&flow=Default&onscreen=persist
- Do not present for CDN. Leave for questions.