Phone:     Email:


Peer-Reviewed Publications

  1.  Christianson, L., A. Castelló, R. Christianson, A. Bhandari, and M. Helmers. 2010. Technical note: Hydraulic property determination of denitrifying bioreactor fill media. Applied Engineering in Agriculture 26(5): 849‐854.
  2.  Christianson, L., A. Bhandari, and M. Helmers. 2011. Pilot-scale evaluation of denitrification drainage bioreactors: Reactor geometry and performance. Journal of Environmental Engineering 137(4): 213-220.
  3. Christianson, L., J. Hanly, and M. Hedley. 2011. Optimized denitrification bioreactor treatment through simulated drainage containment. Agricultural Water Management 99(1):85-92.
  4. Christianson, L., and J. Tyndall. 2011. Seeking a dialog: A targeted technology for sustainable agricultural systems in the American Corn Belt. Sustainability: Science, Practice, & Policy 7(2). Available at:
  5. Christianson, L., A. Bhandari, M. Helmers, K. Kult, T. Sutphin, and R. Wolf. 2012. Performance evaluation of four field-scale agricultural drainage denitrification bioreactors in Iowa. Transactions of the ASABE 55(6): 2163-2174.
  6. Christianson, L., A. Bhandari, and M. Helmers. 2012. A practice-oriented review of woodchip bioreactors for subsurface agricultural drainage. Applied Engineering in Agriculture 28(6): 861-874.
  7. Christianson, L., N. Hoover, A. Bhandari, and M. J. Helmers. 2012. Technical Note: The potential of municipal yard waste to be denitrification bioreactor fill. Applied Engineering in Agriculture 28(6): 853-859.
  8. Christianson, L., R. Christianson, M. Helmers, C. Pederson, and A. Bhandari. 2013. Modeling and calibration of drainage denitrification bioreactor design criteria. Irrigation and Drainage Engineering 139(9): 699-709.
  9. Christianson, L. M. Helmers, A. Bhandari, and T. Moorman. 2013. Internal hydraulics of an agricultural drainage denitrification bioreactor. Ecological Engineering 52: 298-307.
  10. Christianson, L., M. Smith, D. Storm, M. White, S. Stoodley. 2013. Evaluating Remote Sensing Methods for Targeting Erosion in Riparian Corridors. Proceedings of the Oklahoma Academy of Science, 93: 55-65.
  11. Christianson, L., J. Tyndall, and M. Helmers. 2013. Financial comparison of seven nitrate reduction strategies for Midwestern agricultural drainage. Water Resources and Economics 2-3:30-56.
  12. Christianson, L., T. Knoot, D. Larsen, J. Tyndall, and M. Helmers. 2014. Adoption potential of nitrate mitigation practices: an ecosystem services approach. International Journal of Agricultural Sustainability 12(4): 407-424.
  13. Christianson, L., and S. Summerfelt. 2014. Fluidization velocity assessment of commercially available sulfur particles for use in autotrophic denitrification biofilters. Aquacultural Engineering 60:1-5.
  14. Christianson, L., and R. Harmel. 2015. The MANAGE Drain Load database: Review and compilation of more than fifty years of North American drainage nutrient studies. Water Management 159:277-289.
  15. Feyereisen, G., and L. Christianson. 2015. Hydraulic flow characteristics of agricultural residues for denitrifying bioreactor media. Applied Engineering in Agriculture 31(1): 89-96.
  16. Tsukuda, S., L. Christianson, K. Saito, A. Kolb, and S. Summerfelt. 2015. Heterotrophic denitrification of aquaculture effluent using fluidized sand biofilters. Aquacultural Engineering 64:49-59.
  17.  Christianson, L., and R. Harmel. 2015. 4R water quality impacts: An assessment and synthesis of forty years of drainage nitrogen losses. Journal of Environmental Quality 44(6):1852-1860.
  18.  Christianson, L., C. Lepine, S. Tsukuda, K. Saito, and S. Summerfelt. 2015. Nitrate removal effectiveness of fluidized sulfur-based autotrophic denitrification biofilters for recirculating aquaculture systems. Aquacultural Engineering 68:10-18.
  19. Christianson, L. and L. Schipper. 2016. Moving denitrifying bioreactors beyond proof of concept: Introduction to the special section. Journal of Environmental Quality 45(3): 757-761.
  20. Addy, K., A. Gold, L. Christianson, M. David, L. Schipper, and N. Sacha. 2016. Denitrifying Bioreactors for Nitrate Removal: A Meta-analysis. Journal of Environmental Quality 45(3): 873-881.
  21. Feyereisen, G., T. Moorman, L. Christianson, R. Venterea, J. Coulter, U. Tschirner. 2016. Performance of agricultural residue media in laboratory denitrifying bioreactors at low temperatures. Journal of Environmental Quality 45(3): 779-787.
  22. Sharrer, K., L. Christianson, C. Lepine, and S. Summerfelt. 2016. Modeling and mitigation of denitrification ‘woodchip’ bioreactor phosphorus releases during treatment of aquaculture wastewater. Ecological Engineering 93:135-143.
  23. Lepine, C., L. Christianson, K. Sharrer, and S. Summerfelt. 2016. Optimizing hydraulic retention times in denitrifying woodchip bioreactors treating recirculating aquaculture system wastewater. Journal of Environmental Quality 45(3): 813-821.
  24. Christianson, L., C. Lepine, K. Sharrer, and S. Summerfelt. 2016. Denitrifying bioreactor clogging potential during wastewater treatment. Water Research 105:147-156.
  25. Harmel, R., L. Christianson, M. McBroom, D. Smith, and K. Higgs. 2016. Expansion of the MANAGE database with forest and drainage studies. Am. Water Res. Assoc’n. 10.1111/1752-1688.12438.
  26. Christianson, L., R. Harmel, D. Smith, M. Williams, and K. King. 2016. Assessment and synthesis of 50 years of published drainage phosphorus losses. Journal of Environmental Quality 45(5): 1467-1477.
  27. Zhao, X., L. Christianson, D. Harmel, and C. Pittelkow. 2016. Assessment of drainage nitrogen losses on a yield-scaled basis. Field Crops Research 199:156-166.
  28. Rosen, T. and L. Christianson. 2017. Performance of denitrifying bioreactors at reducing agricultural nitrogen pollution in a humid subtropical coastal plain environment. Water 9(2):112.
  29. Christianson, L., J. Faulkner, T. Basden and D. DeVallance. 2017. Scientifically advanced woody media for improved water quality from livestock woodchip heavy-use areas. Frontiers of Environmental Science and Engineering 11:2 doi:10.1007/s11783-017-0909-7.
  30. Feyereisen, G., L. Christianson, T. Moorman, R. Venterea, and J. Coulter. In press 2017. Plastic biofilm carrier after corn cobs reduces nitrate loading in laboratory denitrifying bioreactors. Journal of Environmental Quality doi: 10.2134/jeq2017.02.0060.
  31. Christianson, L., C. Lepine, P. Sibrell, C. Penn, and S. Summerfelt. In press 2017. Denitrifying woodchip bioreactor and phosphorus filter pairing to minimize pollution swapping. Water Research


Non-Peer Reviewed Outreach Publications Available Online

  1. Christianson, L. 2016. Nutrient loss reduction: Using science to find the right practices for your field. Illinois Extension and Illinois Water Resources Center (4-pg factsheet). Available at:
  2. Christianson, L., J. Frankenberger, C. Hay, M. Helmers, and G. Sands (Eds.). 2016. Ten ways to reduce nitrogen loads from drained cropland in the Midwest. Urbana, IL: Illinois Extension. (Open peer review). Available at:
  3. Christianson, L., and M. Helmers. 2011. Woodchip bioreactors for nitrate in agricultural drainage. Iowa State University Extension Publication PMR 1008 (double blind expert-reviewed). Available at: