GREENeR: Geospatial Regression Equation for European Nutrient Losses

The package provides tools and methods to apply the model Geospatial Regression Equation for European Nutrient losses (GREEN; Grizzetti et al. (2005); Grizzetti et al. (2012); Grizzetti et al. (2021)) to an area of interest in R environment. The package comprises functions for assessing annual nutrient (nitrogen and phosphorus) loads from a basin or region of interest, land and river retention, and contribution shares by sources. A brief description of the model, including sources and parameters, can be found at the end of this document. Further, the package includes functions for loading spatio-temporal data , calibrating basin parameters, performing an advanced sensitivity analysis to evaluate the calibration results, and visualizing model inputs and outputs through plots and maps. The package is parallel-capable to alleviate the computational burden in large basins.

References

Grizzetti, B., Bouraoui, F., De Marsily, G., & Bidoglio, G. (2005). A statistical method for source apportionment of riverine nitrogen loads. Journal of Hydrology, 304(1-4), 302-315. doi: 10.1016/j.jhydrol.2004.07.036

Grizzetti, B., Bouraoui, F., De Marsily, G., (2008). Assessing nitrogen pressures on European surface water. Global Biogeochem. Cycles 22..

Grizzetti, B., Bouraoui, F., & Aloe, A. (2012). Changes of nitrogen and phosphorus loads to E uropean seas. Global Change Biology, 18(2), 769-782. doi: 10.1111/j.1365-2486.2011.02576.x

Grizzetti, B., Vigiak, O., Udias, A., Aloe, A., Zanni, M., Bouraoui, F., Pistocchi, A., Dorati, C., Friedland, R., De Roo, A., others & Bielza, M. (2021). How EU policies could reduce nutrient pollution in European inland and coastal waters. Global Environmental Change, 69, 102281. doi: 10.1016/j.gloenvcha.2021.102281