Distribution Pattern of Suspended Sediments in Wulan Delta, Demak, Indonesia

摘要

Suspended sediments are important factor in a sedimentation process. Oceanographic, hydrodynamic, andmeteorological conditions along; benthic habitat, mangroves, and ponds in coastal area, affect sedimentationdistribution in Wulan Delta. The purpose of this study wasto estimate the concentration of suspended sediments from2016 to 2018 and analyze its distribution patterns in Wulan Delta, Wedung District, Demak Regency, Central Java,Indonesia. We used quantitative methods and descriptive analyses to process and analyse data. The oceanographic,hydrodynamic, and meteorological paramaters such as wind, waves, currents, and tides, were used to examine thedistribution of suspended sediments, while remote sensing images data were used to estimate the concentration ofsuspended sediments. The hydrodynamic of Wulan Delta in the west season was more significant than in the eastseason, with wind velocities ranging from 8.8 to 11.1 m/s and wave height of <1 m. Waves are destructive in theformer while constructive in the latter. Current velocities ranging from 0 to 0,25 m/s and mixed tides with prevailingdiurnal type. From 2016 to 2018, the concentration of the suspended sediments varied between 60 and 180 mg/l, andtheir distribution followed the development of Wulan Delta, that is, leftward (southwest-south).