Glaciers have been thought of as a hydrological buffer in watersheds, sustaining summer baseflow, maintaining colder stream temperatures, and moderating biogeochemical signatures. However, as the climate continues to warm, rain/snow partitioning shifts, and glaciers lose mass, it is unclear if glacier hydrologic function is shifting in the context of watershed surface water and groundwater systems. This session aims to bring together a wide range of studies across latitudes and climatic regimes to examine the hydrologic role of glaciers within their watersheds, and how it may be changing. We invite submissions that take both hydrological and glaciological approaches to: examine how glaciers can buffer flow and associated signatures across wet and dry years; clarify the role of glaciers in recharging the groundwater system; determine how changing glacier size and structure affects streamflow; and find new insights on glacier stability and hydrologic function that will help make better predictions for future conditions.