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Using Surface Time Domain Reflectometry Measurements to Estimate Subsurface Chemical Movement

^a Dep. of Agronomy, Iowa State Univ., Ames, IA 50011
^b USDA-ARS, National Soil Tilth Lab., 2150 Pammel Dr., Ames, IA 50011
^c Biosystems Engineering and Environmental Science Department, Univ. of Tennessee, Knoxville, TN 37996
^d Dep. of Soil and Water Sciences, Sultan Qaboos Univ. Muscat, Sultanate of Oman

View larger version (30K): [in a new window]   Fig. 1. Schematic diagram of the experiment.

View larger version (24K): [in a new window]   Fig. 2. Observed relative resident concentration for the surface soil determined by dripper–TDR experiment. The circles and solid lines are the measured and fitted values, respectively.

View larger version (38K): [in a new window]   Fig. 3. Observed relative resident concentration for the subsurface soil measured from the ponded infiltrometer experiment. The circles and solid lines are the measured and fitted values, respectively.