Derivation of a fuzzy national phosphorus export model using 84 Irish catchments

► Develops a new national phosphorus export model for agricultural catchments in Ireland ► Improves on earlier empirical phosphorus export models by using k-means clustering method for partitioning data ► Uses ANFIS model to predict annual average ortho-phosphorus concentrations using catchment characteristics ► Phosphorus desorption index (PDI) and runoff risk index (RRI) are essential predictors in the model.