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Challenges to Calibration: Facing an Increasingly Critical Environment

Calibration of a model is no longer a free exercise.For our credibility, it is necessary that the model used forpredictions is the best possible, as the consequences mayaffect property and livelihood. Even then, a phenomenonmay be unforeseen because it was not included in themodel. Monitoring is crucial to enable confirmation ofprevious predictions and to resolve questions in the after-math of engineered changes to the water system. Thesepoints are illustrated using the 36-km