The dynamics of solute and particulate concentrations, measured at a catchment’s outlet, reflect the multitude of processes that are occurring and potentially interacting at different temporal and spatial scales. These processes may include the hydrological mobilization and transport of solutes, but also biogeochemical transformation and retention. Data-driven statistical analyses of discharge and/or concentration time series are a powerful tool to illuminate these underlying processes. Long-term, high-frequency, or multi-solute data as well as measurements from different catchment compartments (e.g., soil- or groundwater) or synoptic sampling campaigns are becoming more available, allowing us to formulate and test hypotheses on dominant ecohydrological and geochemical processes moving “from pattern to process”. This session aims to bring together studies that use data-driven statistical analyses of stream concentration time series to draw conclusions about solute and particulate mobilization, retention, and export mechanisms. Presentations on the following topics are particularly welcome:
Interpretation of concentration-discharge relationships to understand the interplay between hydrological and biogeochemical processes in the terrestrial part of catchments and in the river network
Utilization of high-frequency or multi-parameter observations of water quality
Long-term trajectories in nutrient inputs, outputs, and nutrient stoichiometry
Integration of data from subsurface water or synoptic sampling campaigns
Role of climate change or extremes in altering nutrient export patterns.
Instream, network and wetland or lake effects on the dynamics of nutrient loads and concentrations
Relationship between water travel times and water quality dynamics
Perspectives from less frequently studied catchment settings, including boreal, arctic, mediterranean, (sub-)tropical regions
Perspectives from different land use/land cover settings and their changes (e.g., forest dieback, wetland restoration, urbanization, agricultural practices, etc.)
Anna Lupon