A Perwira Mulia Tarigan(1*)

(1) Universitas Sumatera Utara
(*) Corresponding Author


In order to understand the dynamics of shoreline changes due to natural and anthropogenic causes, it is imperative that a coastal manager comprehend the shore profile characteristics which are dependent on the sediment-wave interaction and can be depicted in a profile equation. Based on the argument of wave energy dissipation per unit bed area and unit time, the power form of the profile equation for a sandy coast can be derived. Using the same argument and considering the phenomenon that the main cause of wave damping over a muddy coast is due to energy absorption by the soft mud bottom, the mud profile equation can be formulated. In this study, shore profile data measured from the muddy coast of Pantai Cermin, a muddy shore on the eastern coast of North Sumatera Province, are fitted to both the sand and mud profile equations. The procedures and results of two best fitting methods, the nonlinear regression and the least square based trial and error search, are exhibited and compared. Several noteworthy features of the mud profile equation are shown as compared to that of the sand profile equation in describing the profile data.


Best fitting, shore profile, mud profile, sand profile

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