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Water Infrastructure WS - Chris Hay
1. Yield Benefits of Drainage
Water Recycling in Iowa and
Indiana
Chris Hay, Iowa Soybean Association
Ben Reinhart, Jane Frankenberger, Laura Bowling, Purdue University
Matthew Helmers, Iowa State University
17. Field data in
IN (DPAC)
and IA (SERF)
(2007-2016, daily)
• Drain flow
• Water Table
• On-site climate
DPAC (Saadat, Bowling,
Frankenberger), SERF
(Helmers)
Slide courtesy of Ben Reinhart, Purdue University
18. Modeling the field and reservoir water
balances
Slide courtesy of Ben Reinhart, Purdue University
20. Mean DPAC yield gap was 3.2 Mg/ha
102 102 102 25 76 76 76 25 0 0
21. Mean SERF yield gap was 2.7 Mg/ha
0 0 0 0 127 127 152 0 0 25
22.
23.
24. In summary:
• Irrigation requirement in 12
to 20 years out of 23
• Generally adequate
drainage water to meet
demand
• Results suggest potential
yield impacts of up to 1.4 to
4.0 Mg/ha
• Reservoir area of 4 to 6%
could meet irrigation
demand
Questions?