Fate and transport in fluvial systems - theoretical upscaling of local processes
Carbon, nutrients, and contaminants are transformed in highly reactive regions of the stream. The overall reactivity therefore depends both on local reactivity of these regions and on the rate that reactive materials are delivered to these regions. For example, while it is relatively simple to determine whether streams are net sources or sinks of CO2, it remains extremely difficult to predict how carbon fluxes will change with changing physical (e.g,. flow, temperature) or chemical (oxygen levels) conditions.
Under this theme, we combine field-scale tracer experiments, numerical experiments and analytical modeling in an effort to better predict how societally-relevant materials are transported and transformed in streams.