Study of sediment deposition at Tanjung Laboh due to jetty structural

Abstract

Changes in coastal areas are due to factors such as natural factors. In recent years human activities and coastal development have contributed greatly to the change of the coast. Concerned with this problem, a study was conducted on the coast of Tanjung Laboh in March 2019 to collect oceanographic data related to coastal change. The purpose of this study was to compare the distribution of sediment size in jetty structure areas and unstructured areas. Specific gravity has been compared between sampling lines A, B, C and D. The study area has been divided into three zone and every sampling line is in between of 80 meters. Field work to collect current velocity data was done during high tide. Estimates of sediment accumulation were carried out by comparing sediment characteristics obtained in structured and unstructured areas that related to current velocity. The results show that the beach profile is silty clay. The current velocity is also found to be low at 0.044 m/s to 0.218 m/s. In conclusion, the sediment transportation and sediment deposition can be influence by current velocity of a coastal and factor of any barrier. Test have been carried out shows that different particles size distribution around jetty structure and without jetty structure.

Intertidal intercepted sediment at jetties along the Gulf of Thailand

“…Previous studies have reported significant beach accretion on the updrift side in response to jetty constructions (Hapke et al, 2013;Garel et al, 2015;Wang et al, 2022). Salleh and Nadzir (2020) showed that flow velocity and current direction around a jetty significantly affected the deposition of coastal sediments. In the United States, Hein et al (2019) presented that the northwards diffracted/refracted waves induced sediment accretion proximal to the south of the jetty and delivered the sediment across the jetty to an adjacent area.…”