期刊
WATER RESOURCES RESEARCH
卷 37, 期 6, 页码 1543-1550出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2000WR900409
关键词
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A mathematical method called subordination broadens the applicability of the classical advection-dispersion equation for contaminant transport. In this method the time variable is randomized to represent the operational time experienced by different particles. In a highly heterogeneous aquifer the operational time captures the fractal properties of the medium. This leads to a simple, parsimonious model of contaminant transport that exhibits many of the features (heavy tails, skewness, and non-Fickian growth rate) typically seen in real aquifers, We employ a stable subordinator that derives from physical models of anomalous diffusion involving fractional derivatives. Applied to a one-dimensional approximation of the MADE-2 data set, the model shows excellent agreement.
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