Description of the tool | An example case: the Lay river Basin | Loading and description of the scenario | Exploring scenario inputs | Lake Retention | Observed Load | Model calibration | Exploring calibration results | Selecting the best parameter sets | Annual observed vs predicted values for a parameter set | Comparing Observed vs Predicted for two sets of parameters | Estimation of nutrient fluxes and source contribution in the basin | Share of nutrients | GREEN model equations, sources and resources for input data | References