1. Designing a drainage system

a. Sizing the Main

• iGrow Drainage Calculators http://www.igrowdrainage.org/#/
  • South Dakota State University  - Chris Hay
• Michigan State Drainage Tools https://www.egr.msu.edu/bae/water/drainage/tools
  • Michigan State University – Ehsan Ghane

b. Selecting drain spacing

• iGrow Drainage Calculators http://www.igrowdrainage.org/#/
  • South Dakota State University  - Chris Hay
• Soil Web App - https://casoilresource.lawr.ucdavis.edu/gmap/
  • USDA/California Soil Resources
• Drain Spacing Tool  https://www.egr.msu.edu/bae/water/drainage/drain-spacing-tool
  • Michigan State University – Ehsan Ghane

c. Matching Drainage Intensity and Drainage Coefficient

• Drainage Rate Calculators https://analytics.iasoybeans.com/cool-apps/TD_DrainageCalculators/
  • Iowa Soybean Association and Transforming Drainage – Chris Hay

2. Conservation Drainage

• Controlled Drainage Suitability - https://transformingdrainage.org//tools/cd-suitability/
  • USDA NRCS
• Subirrigation Suitability - https://transformingdrainage.org//tools/subirrigation-suitability-tool/
  • Purdue University - Ben Reinhart, Jane Frankenberger, others
• Evaluating Drainage Water Recycling Decisions https://transformingdrainage.org//tools/edwrd/
  • Purdue University - Ben Reinhart, Jane Frankenberger, others

3. Where are poorly drained soils that are likely drained?

• Likely Extent of Agricultural Drainage -  https://transformingdrainage.org//tools/drained-area-tool/
  • Purdue University - Ben Reinhart, Jane Frankenberger, others

4. Find photos and videos of drainage practices

• Conservation Drainage Media Library: https://conservationdrainage.net/medialibrary/

5. Find extension publications, datasets, reports related to agricultural and conservation drainage

• Conservation Drainage Resource Library:  https://conservationdrainage.net/resource-library/

For more information, contact Jane Frankenberger (frankenb@purdue.edu) or Ben Reinhart (breinhart3@gmail.com)