Judy A Horwatich
Judy Horwatich is a Hydraulic Engineer with the Upper Midwest Water Science Center.
Over the last 20 years, Judy Horwatich aided local, state, and federal agencies determine the effects that rural and urban runoff has on the environment. Her early career concentrated on agricultural runoff to determine the effectiveness of best management practices on reducing sediment and nutrients to the streams. Her work now focuses measuring the quantity and quality of nonpoint source runoff in urban environments. Judy has assembled 30 years of local, state, and national urban runoff studies and incorporated them into the Source Loading and Management Model (SLAMM). She continues calibrate and verify this model concentrating on Wisconsin parameters. This effort allows Public and private engineers to use WinSLAMM to determine realistic pollution reduction credits for their area of concern. Her recent body of work includes evaluation of several proprietary and non-proprietary stormwater management practices that include hydrodynamic separators, stormwater filters, high-efficiency street cleaners, rain gardens, biofiltration cells and swales, grass swales, and filter strips.
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
Education and Certifications
B.S. in Civil and Environmental Engineering, University of Wisconsin-Madison, 1993
Science and Products
Areas of Concern: Polycyclic Aromatic Hydrocarbons (PAH) Source Tracking in Milwaukee River
WinSLAMM (Source Loading And Management Model): An urban area nonpoint source water-quality model for Wisconsin
The effect of particle size distribution on the design of urban stormwater control measures
Effects of best-management practices in Bower Creek in the East River priority watershed, Wisconsin, 1991-2009
Parking lot runoff quality and treatment efficiencies of a hydrodynamic-settling device in Madison, Wisconsin, 2005-6
Highway-runoff quality, and treatment efficiencies of a hydrodynamic-settling device and a stormwater-filtration device in Milwaukee, Wisconsin
Parking Lot Runoff Quality and Treatment Efficiency of a Stormwater-Filtration Device, Madison, Wisconsin, 2005-07
Water Quality, Hydrology, and Response to Changes in Phosphorus Loading of Nagawicka Lake, a Calcareous Lake in Waukesha County, Wisconsin
Effects of best-management practices in Otter Creek in the Sheboygan River Priority Watershed, Wisconsin, 1990-2002
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
Effects of best-management practices in the Black Earth Creek Priority Watershed, Wisconsin, 1984-98
Influences of watershed, riparian-corridor, and reach-scale characteristics on aquatic biota in agricultural watersheds
WinSLAMM (Source Loading and Management Model): Parameter and standard land-use files for Wisconsin
The SLAMM model is used to identify sources of pollutants in urban stormwater runoff and to evaluate management alternatives for reduce pollutants. These files provide stormwater flow and pollutant-concentration data for calibrating and verifying SLAMM for use in Wisconsin (WinSLAMM).
Science and Products
Areas of Concern: Polycyclic Aromatic Hydrocarbons (PAH) Source Tracking in Milwaukee River
WinSLAMM (Source Loading And Management Model): An urban area nonpoint source water-quality model for Wisconsin
The effect of particle size distribution on the design of urban stormwater control measures
Effects of best-management practices in Bower Creek in the East River priority watershed, Wisconsin, 1991-2009
Parking lot runoff quality and treatment efficiencies of a hydrodynamic-settling device in Madison, Wisconsin, 2005-6
Highway-runoff quality, and treatment efficiencies of a hydrodynamic-settling device and a stormwater-filtration device in Milwaukee, Wisconsin
Parking Lot Runoff Quality and Treatment Efficiency of a Stormwater-Filtration Device, Madison, Wisconsin, 2005-07
Water Quality, Hydrology, and Response to Changes in Phosphorus Loading of Nagawicka Lake, a Calcareous Lake in Waukesha County, Wisconsin
Effects of best-management practices in Otter Creek in the Sheboygan River Priority Watershed, Wisconsin, 1990-2002
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
Effects of best-management practices in the Black Earth Creek Priority Watershed, Wisconsin, 1984-98
Influences of watershed, riparian-corridor, and reach-scale characteristics on aquatic biota in agricultural watersheds
WinSLAMM (Source Loading and Management Model): Parameter and standard land-use files for Wisconsin
The SLAMM model is used to identify sources of pollutants in urban stormwater runoff and to evaluate management alternatives for reduce pollutants. These files provide stormwater flow and pollutant-concentration data for calibrating and verifying SLAMM for use in Wisconsin (WinSLAMM).