Temporal detection of Total Suspended Solid (TSS) distribution in the southern area of Obi Island

The Halmahera Selatan Regency has many potential natural resources including mining potential, and nickel is one potential that can be found in Obi Island. The abundance of nickel in Obi Island also increases activities that cause various materials to enter the sea. The sediment materials entering the waters through land runoff are suspended sediment or Total Suspended Solids (TSS). Sentinel 2 satellite imageries could observed TSS concentration and its distribution in this research through visible and infrared channels. The distribution of TSS will be determined by using an algorithm, which uses the blue and green bands with corrected atmospheric reflectance format. Based on the data processing results, the distribution of TSS values in the southern area of Obi Island in 2023 was in the range of 4 - 874 mg/l that were divided into three groups of areas, represented by A area within the range of 4 – 874 mg/l, which describes the distribution of TSS in coastal areas without human settlements, B area within range of 4 - 237 mg/l which depicting TSS conditions at river estuaries, and group C area within range of 4 – 431 mg/l which illustrating TSS locations in coastal areas with human settlements.