Oceanographic Observation of Two Inlet Lagoons, Study Case : Segara Anakan Lagoon Putri Farhaniah Zuldis, Faruq Khadami
Faculty of Earth Science and Technology, Institut Teknologi Bandung
Jalan Ganesha 10, Bandung 40132, Indonesia
Abstract
Segara Anakan, located in the western part of Cilacap city, Central Java, is one of the estuaries that has two entrances in the east and west. Dynamics in Segara Anakan are influenced by two components, namely tides and currents due to river flow. For this reason, in order to obtain an up-to-date picture of Segara Anakan, survey activities were conducted at the end of April 2024 using primary data collection methods at high and low tides using ADCP, CTD, and Tide Gauge. The Observation Station is Citanduy and Klaces. The calculation of these parameters includes differences in salinity, density, bouyancy frequency values and vertical shear. In Citanduy, the average salinity reached 0.1 psu. In Klaces, the average salinity reached 20 psu. The spatial variation shows that the closer to the west entrance, the higher the salinity, showing a value of 32 psu and the tidal confluence occurs in the center of Segara Anakan or in Klaces. Current patterns in Citanduy estuary show that the dominant current is river current while the current pattern in Klaces is dominant tidal current.
Keywords: Estuary, Tidal, Current due to River flow, Data observation, Segara Anakan
