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Quantifying Preferential Flow by Breakthrough of Sequentially Applied Tracers

Silt Loam Soil

^a Dep. of Soil Science, Madison, WI USA
^b Dep. of Biol. System Eng., Univ. of Wisconsin, Madison, WI 53706-1299 USA
^c Dep. of Agronomy, Purdue Univ., West Lafayette, IN USA
^d Dep. of Agric. and Biol. Eng., Cornell Univ., Ithaca, NY 14850 USA
^e Weed Science Lab., USDA-ARS, BARC-W, 10300 Baltimore Blvd., Beltsville, MD 20705-2350 USA

View larger version (32K): [in a new window]   Fig. 1 The mass flux of six chemicals during the first 10 days, while each was normalized by its applied mass

View larger version (38K): [in a new window]   Fig. 2 The breakthrough curves of the four conservative tracers and tile flow hydrograph

View larger version (42K): [in a new window]   Fig. 3 The breakthrough curves of the four conservative tracers plotted against the times since their applications