PEMODELAN PENYEBARAN KLOROFIL-A DI TELUK JAKARTA MENGGUNAKAN METODE PEMODELAN NUMERIK SAAT MUSON BARAT DAN MUSON TIMUR

• Main Author: Lestari Siadari, Winda
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48242
• Institution: Institut Teknologi Bandung

Jakarta Bay is one of the very high polluted waters in Indonesia. The concentration of this pollutant continues to increase along with the continued increase in population, development, and industry in Jakarta and surrounding areas. The tendency of increasing pollutants over time has exceeded the carrying capacity. In this study, a simulation modeling of the distribution of chlorophyll-a in the Bay of Jakarta is done using numerical modeling methods. Input parameters used in this study are bathymetry data, tidal data, wind data, water discharge data, and chlorophyll-a concentration from one of the major rivers that empty into the Jakarta Bay, Cengkareng Drain. The simulation is carried out using two scenarios, during the west monsoon and the east monsoon. Based on the results of modeling, the results show that the distribution of chlorophyll-a in Jakarta Bay can be categorized quite fast, where at the end of the modeling, chlorophyll-a seems to have spread quite far from the mouth of Cengkareng Drain. The highest concentration of chlorophyll-a up to 2x10-5 kg/m3 is found on the coast and river mouth. This concentration is seen increasingly decreased in the high seas with a concentration of 0.2-0.8x10-5 kg/m3. The impact of the west monsoon and east monsoon winds is also clearly seen in the modeling results of each wind phenomenon. In January 2018 it is seen that chlorophyll-a spread eastward following the movement of the west monsoon wind, while in July 2018 it was seen that chlorophyll-a spread westward following the movement of the east monsoon wind. The highest chlorophyll-a concentration and the farthest chlorophyll track seen during the west monsoon phenomenon, this corresponds with the condition of the west monsoon wind which has bigger average strength of 5.1 m/s than the east monsoon wind which is only 1.8 m/s.