His research is focused on water, solutes and energy fluxes in the subsurface, as well as their exchange into the atmosphere. He serves as the Director of the Centers for Transformative Environmental Sensing Programs (www.ctemps.org), a National Science Foundation supported instrument center focusing on the development of distributed fiber optic sensing, unmanned aircraft remote sensing and innovative environmental sensors. He and his team of students and post-doctoral researchers are currently also studying the role of groundwater/surface water interactions in aquatic ecology,the study of Antarctic ice shelf stability, the quantitative assessment of root dynamics using micro-Computed X-ray Tomography (MCT), as well as the design and operation of salinity-gradient solar ponds coupled with membrane distillation for the development of low-cost desalination. He as published over 130 peer reviewed manuscripts and book chapters beginning with a focus on fractal approaches in porous media, arid region hydrogeology, variable density groundwater flow, micrometeorology and remote sensing. He is a Fellow of the American Geophysical Union, the Geological Society of America, the Soil Science Society of America and currently serves on the National Academy of Sciences Owens Lake Scientific Advisory Panel. He is currently the President of the Hydrology Section of the American Geophysical Union and serves on the AGU's Council Leadership Team.