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Desi, Natsar
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Evaluation of Reclamation Activities on Post-Mining Land Gunawan, Gunawan; Chaerul, Muhammad; Desi, Natsar; Erniati, Erniati; Harun, A. Yusuf; Dirman, Eris Nur
Journal La Lifesci Vol. 7 No. 1 (2026): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v7i1.2923

Abstract

This study aims to evaluate reclamation activities on the post-mining land of PT Bumi Sentosa Jaya in Boedingi Village, Lasolo District, North Konawe Regency, Southeast Sulawesi Province. Mining activities carried out in the area have caused environmental degradation, particularly in soil quality and vegetation. Therefore, reclamation activities, including revegetation, need to be carried out to restore the ecological function of the land. This study uses the Normalized Difference Vegetation Index (NDVI) analysis method to evaluate the success rate of revegetation as an indicator of vegetation health and density. In addition, an analysis was conducted on the reclamation plan and the estimated costs required. The data used in this study consisted of Sentinel-2 satellite images and drone photos to obtain an accurate picture of topographical changes and vegetation growth. The results showed that the reclamation activities carried out by PT Bumi Sentosa Jaya succeeded in increasing vegetation density in the reclaimed area. The area of land that has been reclaimed reached 11.90 ha in the period from 2023 to 2024, with the success of revegetation measurable through an increase in NDVI values. The reclamation plan, which includes land preparation, planting of cover crops and pioneer plants, and plant maintenance, has been implemented in accordance with established standards. This study is expected to contribute to the development of reclamation and revegetation techniques in mining areas, as well as provide recommendations for companies and policy makers to improve the success of future reclamation activities.
The Impact of Nickel Mining Activities on Watershed Hydrology and Coastal Sedimentation Efrianto, Efrianto; Chaerul, Muhammad; Marzuki, Ismail; Desi, Natsar; Mahmud, Mahmud; Dirman, Eris Nur
Journal La Lifesci Vol. 7 No. 1 (2026): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v7i1.3059

Abstract

growing rapidly and have the potential to put pressure on the hydrological system of the Watershed (DAS) and the dynamics of sedimentation in coastal areas. The applied open-pit mining system causes extensive land clearing and reduced vegetation cover, which can increase surface runoff and soil erosion. This study aims to analyze the spatial relationship between nickel mining land clearing, watershed hydrological response, and coastal sedimentation levels during the period 2016–2025. The data used are multi- temporal Sentinel-2 Level-2A satellite images analyzed using the Normalized Difference Vegetation Index (NDVI) to identify the condition of mining land clearing and the Normalized Difference Turbidity Index (NDTI) to represent the level of sedimentation and turbidity of coastal waters. Spatial analysis was carried out based on watershed units to examine the upstream–downstream relationship between the intensity of mining land clearing and sedimentation responses in the estuarine zone. The results show that watersheds with a dominant low NDVI value tend to experience increased surface runoff and potential soil erosion, which in turn contributes to increased coastal sedimentation as indicated by relatively high NDTI values. These findings confirm a strong link between land cover changes due to nickel mining activities, watershed hydrological responses, and coastal sedimentation intensity. This research emphasizes the importance of a watershed-based approach in nickel mining environmental management and sedimentation impact mitigation efforts to maintain the sustainability of coastal ecosystems.
Co-Authors Abdul Karim Abdul Karim Abu, Arman Andi Muh. Dayri Satriawan Anugrah, Anugrah Asrudin, Asrudin Chaeruel, M Chaerul, Muh Dirman, Eris Nur Efrianto Efrianto, Efrianto Erniati Bachtiar Erniati Erniati Fatmeriany, Fatmeriany Gunawan Gunawan Gusty, Sri Haeriska, Haeriska Harun, A. Muh. Yusuf Harun, A. Yusuf Idris, M. Naufal Az Zarqan Imran T, Muh. Irmawan Irmawan Ismail Marzuki Ismail Marzuki Jamilah Jamilah Lismawati, Lismawati Mahmud Mahmud Muhammad Azis Muhammad Azis Muhammad Chaerul Mulyadi Mulyadi Musliani, Musliani Poppy Indrayani POPPY INDRAYANI, POPPY Rachman, David Sumantri Ritnawati Makbul Rosnaini Daga Satriawan, Andi Muh. Dayri Sry Gusty, Sry Sunusi, Widia Anggraeni Wintari, Ni Kadek Yoom, Lilis Irjayanti