Theory 77/Measurement & modelling/Model calibration
Calibration Is Parameters Against Data
The claim
A hydrological model is identifiable only when the ratio of calibrated parameters to independent observations is small, so a rich model fitted to a short record is not constrained.
01Mechanism
Each parameter needs data to pin it; the ratio determines equifinality.
02Prediction
Uncertainty should track the ratio.
03Refutation
Uncertainty tracking model structure would remove the data count.