Stable, radioactive and radiogenic isotopes, trace element and noble gases are routinely utilized within the hydrologic sciences to quantify subsurface flow paths, sources, residence times and reactive processes. Residence times are an important metric reflecting the functioning of hydrological systems including water rock interaction, biogeochemical cycling, and water supply sustainability. The last decade has seen transformative advancements in analytical techniques which necessitate revised experimental design, interpretation, analysis, and modeling approaches, leading to new studies that will more accurately resolve the structure of fluid transport and solute transformation across a broad range of scales. This session includes presentations offering new insights into the linkages between surface and subsurface hydrology, ecohydrology, environmental and resource sustainability, nutrient and contaminant hydrology stemming from novel isotopic tracers, trace elements and noble gases in field systems, laboratory experiments and numerical models.