DOMINANT CAUSES OF MORPHOLOGICAL CHANGES ON INTERTIDAL FLATS

摘要

In order to evaluate the dominating causes of morphological response on the tidal flats, quadratic polynomial approach has been proposed for approximation of cross-shore profiles. A relationship between three parameters of the polynomial and external forces has been examined. Consequently, tidal motions are dominant for tidal flats, which have convex-upwards profiles. This result agrees with that obtained by Kirby (2000). A domination of wind waves and river discharges can become important at a time scale that is shorter than the present observation intervals. This warrants future observations at before and after both storm and typhoon conditions.