STATISTICAL VALIDATION METHODS - APPLICATION TO UNIT HYDROGRAPHS

In hydraulic and hydrologic studies, engineers develop new models or c alibrate existing models by various techniques. One is often concerned with the model validity regarding its ability to predict future event s. Five potentially useful statistical validation methods are presente d. For illustration, they were applied to examine the predictability o f unit hydrographs derived by various methods in the framework of the least squares and its variations. It was found that storm-stacking (co nventional multistorm analysis) together with storm-scaling yields the most desirable UH, The general framework of these validation methods can also be applied to a validation study of other hydrologic and hydr aulic models.