TY - JOUR T1 - River models physical vs. mathematical JF - Philippine Engineering Journal A1 - Castro, Peter P.M LA - English UL - https://tuklas.up.edu.ph/Record/UP-99796217612899316 AB - Rigid bed physical and mathematical modeling are each discussed at review level. A brief historical background, an introduction to the theoretical basis for validity, and some sub-classifications and variants are included. The two techniques are then compared, and some criteria for selection of method to use are mentioned. It is suggested that problem definition should govern in the choice of models. Recent trends that are radically changing the criteria are also mentioned. ER -