Mathematical models of varying complexity have been developed since the 1960s to
interpret environmental tracer concentrations in groundwater flow systems. This review …

Random walk (RW) methods are recurring Monte Carlo methods used to model convective
and diffusive transport in complex heterogeneous media. Many applications can be found …

This review presents the physical mechanisms generating residence time distributions
(RTDs) in hydrologic systems with a focus on steady-state analytical solutions. Steady-state …

A major limitation to the assessment of catchment transit time (TT) stems from the use of
stable isotopes or chloride as hydrological tracers, because these tracers are blind to older …

The biogeochemical functioning of stream ecosystems is heavily dependent on water and
water‐borne nutrient fluxes between the stream itself and the streambed and banks (ie, the …

Dissolved Oxygen (DO) plays a key role in reactive processes and microbial dynamics in the
critical zone. Recent observations showed that fractures can provide rapid pathways for …

Determining groundwater ages from environmental tracer concentrations measured on
samples obtained from open bores or long-screened intervals is fraught with difficulty …

The long-term fate of agricultural nitrate depends on rapid subsurface transfer, denitrification
and storage in aquifers. Quantifying these processes remains an issue due to time varying …

We investigate the way diverse groundwater extraction strategies affect the history of solute
concentration recovered at a pum** well while taking into account random spatial …

Study region The study site, the Mount Bruce Flats, is located in the Pilbara, a semiarid
region of northern Western Australia. Study focus Semiarid climates are characterised by an …