Three-dimensional modelling and analysis of dense nonaqueous phase liquid source zone architecture in heterogeneous soil

Dense nonaqueous phase liquid (DNAPL) source zone characteristics was investigated through three-dimensional (3-D) simulations of DNAPL infiltration and spreading in random soil permeability fields which were generated with the same geostatistical parameters. Results show asymmetric distribution of DNAPL saturation and high variabilities of maximum DNAPL saturation and spreading in the vertical direction. This implies that two-dimensional DNAPL mass distribution may not be representative of the characteristics of 3-D distribution for assessing mass flux/reduction of source zone dissolution.