漂砂の動態による海岸の分類について

Abstract

To investigate beach processes, topographical situation of the beach has to be clarified.From the view point of the budget of littoral sediments, a new classification of sandy beaches isproposed, taking into consideration both the classification of coasts by Shepard and Tanner' sconcept of equilibrium beach. The classification provides three types of sandy beaches, such asclosed sand drift beach, quasi-closed sand drift beach and open sand drift beach. Sandybeaches can be considered as equilibrium, erosional and depositional beaches respectively in theclassification of sandy beaches proposed. Practical examples for these classifications are shownfor additional explanation of them.