Ourresearch is all around hydrology, with emphasis on the subsurface. We mostly look at basic science related to water flow and reactive transport in the vadose zone, in both agricultural and non-agricultural environments. Our primary focus now is on soil aquifer treatment (SAT) and hydrogeophysics. Recent studies include the investigation and optimization of SAT through a mechanistic understanding of the related biogeochemical processes, reactive transport in dynamic systems, and the use of spectral-induced polarization to detect and monitor soil contamination at various scales.