INCA-Microplastics (Integrated Catchment model of MicroPlastics transport) is a mathematical model designed to assess microplastics fate and transport in landscapes. The model calculates microplastic concentrations and fluxes in and across soil, stream water and river sediments at the scale of a river catchment.  

Simulations produced by the model accounts for the effects of plastic particle physical characteristics (size, shape, and density), weather conditions and river flow variability on the retention of microplastic in soils, their runoff to river water, the transport by the stream (e.g., by physically describing the settling and entrainment processes to and from the sediment bed) and their total discharge at the river mouth.  

INCA-Microplastics is typically set to represent specific geographical scenarios and can use historical precipitation data to run realistic simulations. The model has been calibrated in a river catchment in Southern Europe and its predictive performance was successfully assessed against experimental data.  A detailed description of the model and information on the parameter calibration and assessment of prediction performance is provided in Norling et al. (2023).

INCA-Microplastics was developed at the Norwegian Institute for Water Research (NIVA) by Luca Nizzetto and Magnus Norling.  The interface presented here and the frame to estimate microplastic releases have been developed by François Clayer (NIVA). 

By filling in the form below, you can access a demonstration page that offers the possibility of testing and exploring some key features of INCA-Microplastics. If you are interested in a specific and more advanced use of the model, please contact