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Judy Horwatich

Hydraulic Engineer

Contact Information

U.S. Geological Survey
Wisconsin Water Science Center
8505 Research Way
Middleton, Wisconsin 53562
Phone: 608-821-3874
Fax: 608-821-3817
Email: jahorwat@usgs.gov

Education

• B.S. in Civil and Environmental Engineering, University of Wisconsin-Madison, 1993

Areas of Expertise

• Judy's work focuses on understanding the relationship of water quality to stormwater runoff. She has calibrated several urban runoff models that incorporates data collected from the Wisconsin USGS including Source Loading and Management Model (SLAMM), Stormwater Management Model (SWMM), and P8 (Urban Catchment Model)

Current Projects

• Long-term calibration of Source Loading and Management Model (SLAMM) for the State of Wisconsin
• Evaluation of proprietary stormwater device that have been installed at various source areas
• Assessment of filtration and infiltration systems that were designed using the State of Wisconsin Technical standards
• Utilization of GIS to evaluate the relationship between landuse and water quality

Professional Licenses and Certifications

State of Wisconsin Professional Hydrologist

Selected Publications

USGS Series Publications

Garn, Herbert S.; Robertson, Dale M.; Rose, William J.; Goddard, Gerald L.; Horwatich, Judy A., 2006, Water Quality, Hydrology, and Response to Changes in Phosphorus Loading of Nagawicka Lake, a Calcareous Lake in Waukesha County, Wisconsin, U.S. Geological Survey Scientific Investigations Report 2006-5273, 53 p.

Corsi, S.R., Walker, J.F., Wang, Lizhu, Horwatich, J.A., and Bannerman, R.T., 2005, Effects of best-management practices in Otter Creek in the Sheboygan River Priority Watershed, Wisconsin, 1990–2002: U.S. Geological Survey Scientific Investigations Report 2005–5009.

Horwatich, J.A., Corsi, R.S., Bannerman, R.T., 2004, Effectiveness of a pressurized stormwater filtration system in Green Bay, Wisconsin—A study for the Environmental Technology Verification Program of the U.S. Environmental Protection Agency: U.S. Geological Survey Scientific Investigations Report 2004-5222, p 19.

Graczyk, D.J., Walker, J.F., Horwatich, J.A., and Bannerman, R.T., 2003, Effects of best-management practices in the Black Earth Creek priority watershed,Wisconsin, 1984–98: U.S. Geological Survey Water-Resources Investigations Report 03–4163, 24 p.

Wierl [Horwatich], Judy A.; Giddings, Elise M.P.; Bannerman, Roger T.; 1998, Evaluation of a Method for Comparing Phosphorus Loads from Barnyards and Croplands in Otter Creek Watershed, Wisconsin: U.S. Geological Survey Fact Sheet FS 168-98, 1 sheet [4 p.]

Rappold, K.F., Wierl, J.A., and Amerson, F.U., 1997, Watershed Characteristics and Land Management in the Nonpoint-Source Evaluation Monitoring Watersheds in Wisconsin: U.S. Geological Survey Open-File Report 97-119, 39p.

Wierl, J.A., Rappold, K.F., and Amerson, F.U., 1996, Summary of the land-use inventory for the nonpoint-source evaluation monitoring watersheds in Wisconsin: U.S. Geological Survey Open-File Report 96-123, 23p.

Walker, J.F., Graczyk, D.J., Corsi, S.R., Owens, D.W., and Wierl, J.A., 1995, Evaluation of nonpoint-source contamination, Wisconsin; land-use and best-management-practices inventory, selected streamwater-quality data, urban-watershed quality assurance and quality control, constituent loads in rural streams, and snowmelt-runoff analysis, water year 1994: U.S. Geological Survey Open-File Report 95-320, 21 p.

Journal articles, reports, and other publications

Stewart, Jana S.; Wang, Lizhu; Lyons, John; Horwatich, Judy A; Bannerman, Roger; "Influences of Watershed, Riparian-Corridor, and Reach-Scale Characteristics on Aquatic Biota in Agricultural Watersheds," JAWRA Journal of the American Water Resources Association 37(6):1475-1487, Dec. 2001. doi:10.1111/j.1752-1688.2001.tb03654.x

U.S. Environmental Protection Agency, July 2004, Environmental Technology Verification Report, Stormwater Source Area Treatment Device, The Stormwater Management StormFilter® Using ZPG Filter Media: 04/17/WQPC-WWF, EPA/600/R-04/125, 65 p.

U.S. Environmental Protection Agency, 2005, Environmental Technology Verification Report, Stormwater Source Area Treatment Device, Vortechnics, Inc., Vortechs® System, Model 1000: 05/24/WQPC-WWF, EPA 600/R–05/140, 66 p.