4. Groundwater & Zero-order Streams
Groundwater inflows are major sources of water, carbon and nutrients to streams. As such, groundwater inflows can control rivers’ functionality by acting as a direct source of solutes and by supplying limiting resources that fuel aquatic metabolism. Yet, most empirical and modelling approaches in freshwater sciences do not consider groundwater inflows, as neither do the vast majority of monitoring programs. As a result, a general mechanistic understanding on how groundwater inflows affect catchment fluxes remains elusive.
My research combine regular samplings on groundwater and stream chemistry, in-situ experiments, and a variety of models to assess the mechanisms by which groundwater inflows affect biogeochemical fluxes at catchment scale (projects MONTES, CANTERA).
Recently, I have broadened the scope of my research to study the influence of subsurface flow paths (or discrete riparian input points, DRIPS) on stream biogeochemistry (project SITES). These discrete flow paths are widespread in many landscapes, but their role as regulators of stream biogeochemistry is still unknown.