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Dr. John Clausen
Professor Emeritus
Department of Natural Resources & the Environment

University of Connecticut
U-4087, 1376 Storrs Road
Storrs, CT 06269-4087

Room #322
Phone: (860) 486-0139
Fax: (860) 486-5408

Jordan Cove Project
Green Roof Project


Ph.D. 1981 Forest Hydrology, Univ. of Minnesota
M.S. 1973 Forest Hydrology, Univ. of Minnesota
B.S. 1971. Forest Resources Development, Univ. of Minnesota

Courses Taught

NRE 2010 Natural Resources Measurements
NRE 3105 Wetlands Biology and Conservation
NRE 3155 Water Quality Management
NRE 4000W Natural Resources Planning and Management
NRE 5155 Principles of Nonpoint Source Pollution
NRE 6135 Small Watershed Modeling (with G. Warner)

Research Interests

Nonpoint source pollution is the general area of my research. More specifically, that includes riparian zone restoration, analyzing the effectiveness of various best management practices, and evaluating models. I also continue to do research in wetland hydrology and water quality. I have a general interest in proper designs of water quality monitoring studies and have written a book on the subject.

Work Experience

  • 2006 - 2019: Professor, UConn
  • 1993 - 2006: Associate Professor, UConn
  • 1990 - 1993: Assistant Professor, UConn.
  • 1989 - 1990: Research Associate Professor, U. of Vermont
  • 1985 - 1987: Director, Vermont Water Resources Research Center
  • 1981-1989; Research assistant Professor, U. of Vermont
  • 1973 - 1981: Hydrologist, Minnesota Dept. of Natural Resources

Recent Publications

  • Bedan, E. S. and J. C. Clausen. 2009. Stormwater runoff quality and quantity from traditional and low impact development watersheds. J. Amer. Water Res. Assoc. 45:998-1008.
  • Dietz, M., and J.C. Clausen. 2008. Stormwater runoff and export changes with development in a traditional and low impact subdivision. Journal of Environmental Management. 87:560-566.
  • Hood, M.A, J.C. Clausen, and G.S. Warner. 2007. Comparison of stormwater lag times for a low impact development and traditional residential development. J. Amer. Water Res. Assoc. 43:1036-1046.
  • Hood., M. J., J. C. Clausen, and G.S. Warner. 2006. Low impact development works! J. Soil & Water Conservation Society. 60(5):115A-117A
  • Gilbert, J.K. and J.C. Clausen. 2006. Stormwater runoff quality and quantity from asphalt, paver, and crushed stone driveways in Connecticut. Water Research. 40:826-832.
  • Clausen, J.C., I. M. Ortega, C.M. Glaude, R.A. Relyea, G. Garray, and O. Guineo. 2006. Classification of wetlands in a Patagonian National Park, Chile. Wetlands. 26(1): 217-229.
  • Dietz, M.E. and J. C. Clausen. 2006. Saturation to improve pollutant retention in a rain garden. Environ. Sci. & Technol. 40:1335-1340.
  • Dietz, M.E. and J. C. Clausen. 2005. A field evaluation of rain garden flow and pollutant treatment. Water, Air and Soil Pollution. 167:123-138.
  • Gregoire, B.G. and J.C. Clausen. 2011. Effects of a modular extensive green roof on stormwater runoff and water quality. Ecological Engineering 37:963-969.
  • Clausen, J. C. 2014. Water quality and monitoring. Encyclopedia of Natural Resources DOI: 10.1081/E-ENRW-120047558 Taylor & Francis.
  • Clausen, J. C. and M. E. Dietz. 2014. Stormwater management. Encyclopedia of Natural Resources DOI: 10.1081/E-ENRW-120047552 Taylor & Francis.
  • Rosa, D. J., J.C. Clausen, and M. Dietz. 2015. Calibration and verification of SWMM for low impact development. Journal of the American Water Resources Association. 51(3):746-758.
  • Rosa, D.J., J.C. Clausen, and J. Kuzovkina. 2017. Water quality changes in a short-rotation woody crop riparian buffer. Biomass and Bioenergy (Submitted).
  • Pivarnik, A., J.C. Clausen, and D.J Rosa. 2017. A soil additive to reduce runoff and pollutants from dairy heavy use areas. J of Soil and Water Conservation (Submitted).


  • Gant Plaza Green Roof Project. J. Clausen. 2008-2010, US EPA & CT Dept. of Environ. Prot.
  • Effects of vegetation on bacteria and pollutant reduction in a stormwater wetland. J. Clausen, 2006-2009, USDA-CSREES
  • 2010-2013 Clausen, J. C. Physiological Responses of Phragmites australis to the Timing of Plastic Covering Treatments, USDA Hatch. $39,421.
  • 2011-2013 Post-audit verification of the model SWMM for low impact development, DOI/US Geological Survey. (Co-PI). M. Dietz (PI) $29,866.
  • 2012-2016 Organic Stabilizer to Reduce Sediment and Associated Pollutant Losses from Dairy Heavy Use Areas, USDA-NRCS-CT. (PI) with M. Dietz. $75,000.
  • 2012-2017 Agroforestry Riparian Project for Biofuel and Environmental Benefits, USDA-NIFA-Hatch. (PI) with C. Rittenhouse, D. Civco, J. Kuzovkina, G. Robbins, G. Warner, J. Volin, X. Yang. $70,000.
  • 2016-2021 Path to Reduce Pathogens in CT Agricultural Runoff. USDA-NRCS-RCPP. (PI) with A. Morzillo, M. Dietz, R. Meinert. $669,000.


  • 2010 New York Farmers Award
  • 2010 Honor Society of Phi Kappa Phi
  • 2012 National Soil and Water Conservation Society Commendation Award
  • 2013 Northeast Region, United States Department of Agriculture Food and Agriculture Sciences Excellence in Teaching Award
Department of Natural Resources and the Environment
College of Agriculture and Natural Resources
University of Connecticut
1376 Storrs Road, Unit 4087
Storrs, Connecticut 06269-4087
Phone: 860-486-2840