THE EFFECT OF MANGROVE DENSITY ON TIDAL DYNAMICS IN SEGARA ANAKAN, CILACAP, JAWA TENGAH

• Main Author: CITRA SUNARINGATI (NIM : 12913012), LARASATI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28556
• Institution: Institut Teknologi Bandung

This research is about the 2D hydrodynamic modelling of the mangrove area of Segara Anakan using Delft3D-Flow. The purpose of a 2D hydrodynamic model of the mangrove area is to understand the effect of mangrove density on hydrodynamics, especially for the tides in Segara Anakan. The verification results of tidal elevation show that in Klaces and Seleko, the RMSE are about 0,138 and 0,148. The map of the corange and cophase of M2 shows that the maximum amplitude is about 0,5 m and the maximum phase is about 100o. The effect of mangrove density on tidal dynamics can be known by running simulations for Scenario 1 (using a uniform value of Chezy coefficient, 50 m1/2/s in all areas) and 2 (using a Manning value of 0.14 m-1/3/s in the Zone 1, 0.28 m-1/3/s at Zone 2, and 0.27 m-1/3/s in Zone 3). The simulation results of Scenarios 1 and 2 show that the amplitude of M2, S2, K1, and O1 get smaller from Plawangan Barat and Plawangan Timur to the centre of Segara Anakan Lagoon while the phase of M2, S2, K1, and O1 get bigger. The amplitude of Scenario 2 for each component, has a bigger damping from Plawangan Barat and Timur to the centre of lagoon than Scenario 1 because the battom friction value for Scenario 2 is larger than Scenario 1. In addition, the phase of each component in Scenario 2 is also greater than Scenario 1. This phenomenon indicates that mangrove density has a larger effect on dampening the amplitude value and increasing the phase of M2, S2, K1, and O1 components in Segara Anakan than depth.