The authors used an isotope-enabled spectral model to improve the simulation of precipitation and its isotopic composition over Costa Rica to assess the feasibility of using atmospheric model outputs as forcing data for ecohydrological models. When simulating long-term hydrological processes the model outputs provide a reliable source of forcing data and can be used for hydrological forecasts.

This study presents a multi-tracer approach to investigate the impacts of urbanization on pond pollution at the city-scale, linking trace organic contaminant data, urban hydrology, and urbanization measures. In Berlin, urban ponds contained a wide variety of dissolved organic contaminants, with water inflow being a more important driver of high contaminant concentrations than surrounding land use.

ET interacts with multiple hydrological processes: groundwater recharge, lateral flow and streamflow. The inter-linkages become increasingly complex in ET-dominated regions with intensive management. We showed how tracer-aided modelling captures ET dynamics and how trade-offs between discharge and other observations are reflected in simulated hydrological flux/storage patterns.