Extended Data Fig. 5: Performance of the barrier density model.
From: More than one million barriers fragment Europe’s rivers
The maps show the distribution of modelling residuals (predicted minus observed barrier density, in units of barriers per km2) for the model calibration dataset (number of sub-catchments 2,306) (a), and the whole AMBER Barrier Atlas dataset (number of sub-catchments 8,467) (b). Country and sub-basin boundaries were sourced from the European Environment Agency35.
