MODELLING OF SUSPENDED SEDIMENT TRANSPORT IN COASTAL DEMAK INDONESIA BY USING CURRENTS ANALYZING

Abstract

Demak experienced severe abrasions in recent years and Demak coastal erosion has become a national issue. In this study we conducted through a case a study influence of ocean currents and soils structures abrassion. The study covered from 3 -10th June 2016 with ADCP to record 7 x 24 hours. The shear stress in the flow above a bottom-mounted ADCP is estimated from the difference of velocity variance in the opposing ADCP beams. The dynamics of current velocity and validation with current measurement using Sontek Argonaut observation, it was obtained a value of RMSE. The result is the highest flow velocity occurs at a depth of 6 m flow velocities ranging between 0098-0126 m / s east and 0114-0149 m / s north. The yield on the scatter plot shows that the predominant direction of the current is moving to the Northeast.