We investigate the spatiotemporal nonlocality underlying fractional-derivative models as a
possible explanation for regional-scale anomalous dispersion with heavy tails. Properties of …

Natural aquifers usually exhibit complex physical and chemical heterogeneities, which are
key factors complicating kinetic processes, such as contaminant transport and …

Passive tracers in heterogeneous media experience preasymptotic transport with scale‐
dependent anomalous diffusion, before eventually converging to the asymptotic diffusion …

We extend the particle-tracking method to simulate general multi-rate mass transfer (MRMT)
equations. Previous methods for single-rate equations used two-state Markov chains and …

Power law tailing is often observed in the breakthrough curves (BTCs) of tracer tests. Tailing
is attributed to heterogeneity of aquifer properties and cannot be properly modeled by …

Complex structures in fractures and the rock matrix, which are difficult to map exhaustively at
the local scale, can dominate contaminant transport in fractured aquifers. An upscaled …

The solute transport regime is highly dependent upon the heterogeneity of the flow field. In
this study, the influence of eddies on conservative solute transport through a two …

We propose a novel approach to link solute transport behavior to the physical heterogeneity
of the aquifer, which we fully characterize with two measurable parameters: the variance of …

Bimodal transport due to dual-mobile advection or mass exchange between mobile and
immobile zones has been widely observed for pollutants moving in heterogeneous media …

Fast chemical reactions are driven by mixing‐induced chemical disequilibrium. Mixing is
poorly represented by the advection‐dispersion equation. Instead, effective dynamics …