IOP Conference Series: Earth and Environmental Science, vol: 246,1 (2019)
The sediment distribution based on types of grain size in the Cirebon and Demak waters
Nurkhasanah D., Ambariyanto, Suprijanto J., Pusparini N., Prasetyo B.
Abstract
Research on the sediment distribution based on types of grain size in the Cirebon and Demak waters has been conducted. The purposes of this research were to analyze the pattern of sediment distribution based on types of sediment grain size associated with the ocean surface current and rainfall patterns. The research was conducted in January, February, and March 2017 in the waters of Cirebon and Demak. Primary data used in this research was seabed sediment data, while secondary data included daily surface current data from HYCOM (HYbrid Coordinate Ocean Model) with resolution 0.080 and rainfall data. Sediment samples were taken by purposive sampling method at three point stations from each location. Sediment samples were analysed using wet sieving method at Marine Geology Laboratory of Diponegoro University, Semarang. The results showed that sediment texture in the Cirebon and Demak waters were dominated by sand, silt, and clay. The type of sediment in Demak waters was dominated by sand, whereas in the Cirebon region Was dominated by sandy silt. The pattern of sediment distribution was generally parallel to the coastline. Current velocity affected the sediment distribution, where larger types of sedimentary grains were found in areas with higher current velocities. Demak waters with strong current velocity was dominated by sand originating from various sources in the oceans which are carried by the currents and deposited on the coast. Cirebon waters with weaker current velocity and higher rainfall was dominated by sandy silt originating from the rivers that flow into the sea. © 2019 IOP Publishing Ltd.
Keyword: