MOVEMENT OF BROMIDE, NITROGEN-15, AND ATRAZINE THROUGH FLOODED SOILS

Experimental field with shallow PVC piezometers, multi-level samplers and pressure transducers provide water samples from different depths. A downward vertical gradient was established and maintened through the duration of the experiment as floodwater infiltrated the alluvial fan facies silt plot. Mass balance of atrazine, bromide and nitrate were estimated by equations. Estimation of applied chemicals present at each sampling event. Comparison of atrazine concentrations in soil samples at the application plot and maximum aqueous concentrations of atrazine in water samples as a function of depth during flooding and at different depths.