Estimating Atrazine Leaching in the Midwest
Michael R. Burkart, Philip W. Gassman, Thomas B. Moorman, Piyush Singh
October 1998 [98-WP 201]
Burkart, M., P.W. Gassman, T. Moorman, and P. Singh. 1998. "Estimating Atrazine Leaching in the Midwest." Working paper 98-WP 201. Center for Agricultural and Rural Development, Iowa State University.
Data from seven Management Systems Evaluation Areas (MSEM) were used to test the sensitivity of a leaching model, PRZM-2, to a variety of hydrologic settings common in the Midwest. Atrazine leaching was simulated because the use of atrazine was prevalent in the MSEA studies and it frequently occurs in the region's groundwater. Results of long-term simulations using regional and generalized input parameters produced ranks of leaching potential similar to those based on measurements. Short-term simulations used site-specific soil and chemical coefficients.