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The Tongke-tongke mangrove area is surrounded by various conditions that are formed naturally or created by humans, such as ponds, estuaries and rivers. These components were ecologically possible to interacted each other whether in positive or negative terms. This study aims to observe the current environmental statuses of Tongke-tongke mangrove conservation area in Sinjai regency, South Sulawesi. There are three mayor environmental statuses were observed, including: the mangrove area coverage, the density, NDVI values, the distribution of total solid suspended (TSS) from upstream, rivers, estuary, pounds to the mangrove surrounding area. The parameters were determined by remote sensing approach by using Landsat 8 OLI/TIRS data from three different times: 2015, 2017, and 2020. The result shows the increase of mangrove area from 2015 to 2017 from about 54,67 ha to 56,50 ha, but decrease slightly 0,64% in 2020 to 56,14 ha. The NDVI values were about 0,337 in 2015; decrease to 0,307 in 2017; and the lowest value in 2020, 0,263. Based on the NDVI values, the sparse area spreads from 25,5 ha in 2015 to 31,29 ha in 2020; otherwise, the dense area decrease from 19.92 ha to 4,11 ha in 2020. The TSS in water from upstream of Baringeng river was roughly 11,09 ± 1,70 mg/L; and 10,95 ± 0,79 in its estuary; upstream of Mangottong river was roughly 9,60 ± 1,55 mg/L; and 9,22 ± 0,94 mg/L in its estuary. The ponds around the mangrove area has 12,94 ± 2,07 mg/L; and the 9,21 ± 0,99 mg/L in closed coastal water. The results indicate that expansion of the mangrove area is not accompanied by the stability of its condition, although there are no activities in the upstream areas, estuaries, and ponds that cause disturbances biologically, but the decreasing of mangrove dense area may imply uncontrolled logging activities.

Mangrove; Tongke-Tongke; landsat; remote sensing