STUDY OF CHARACTERISTICS, DEPOSITION RATE, AND LOAD SEDIMENT IN ESTUARY ENDER, CIREBON REGENCY

• Main Author: Susanty Sirait, Gaby
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/75684
• Institution: Institut Teknologi Bandung

The dynamics of the coastal area include important sedimentation processes to understand the condition of the coast. An increase in sedimentation can lead to shallowing and disrupt the smooth flow of rivers and transportation to the sea. Coastal regions such as estuaries are closely related to sedimentation issues. This research was conducted to understand the characteristics of sediment, the rate of deposition, and sediment load exiting from the Ender River estuary in Cirebon Regency, as well as its relationship with the current and river discharge. The measurement of sediment load was carried out using cross-section water sampling at depths of 0.2D and 0.8D in the river estuary. These depths represent the actual measurements taken during the sampling process. The sediment deposition rate was measured using sediment traps placed at 6 stations for 40 days. Sediment characteristics were determined through laboratory tests on sediment samples taken at intervals of 200 meters between stations. From the field measurements and laboratory tests, it was found that the sediment load exiting the Ender River estuary during flood tide conditions is 2.493 kg/s and during ebb tide conditions is 2.528 kg/s, with an average deposition rate of 1.978 kg/m3/day. The sediments in the Ender River estuary are dominated by clay sediment. Based on the results of grain size curves, the sediment grain size D60 and D90 were used, with values of D60 at 0.002 mm and D90 ranging from 0.008 to 0.425 mm, and the sediment fall velocity ranging from 0.0001 to 0.178 mm/s. The highest sediment settling velocity was observed in the eastern part of the river estuary. The average current velocity during flood tide conditions is 0.062 m/s, and during ebb tide conditions is 0.124 m/s, with an average river discharge of 3.713 m3/s.