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All Journal International Journal of Hydrological and Environmental for Sustainability Jurnal Indonesia Sosial Sains
Jumbadi, Jumbadi
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Rainfall Analysis as a Hydrological Cycle in Mine Drainage: Implications for Mitigating Nickel Mining Damage in Pomalaa, Southeast Sulawesi Province, Indonesia Jumbadi, Jumbadi; Setiawan, Erwin; Listyani, R.A.T.
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 1 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i1.557

Abstract

Inadequate mining management can harm the surrounding environment, including runoff that transports materials from mining sites to bodies of water or the sea. To prevent environmental damage, it is essential to implement mitigation measures in the mining area, such as constructing settling ponds. The research aims to understand the hydrological cycle in the context of nickel mining and develop strategies to mitigate environmental damage caused by mining activities. By examining rainfall data and its effects on mine drainage, the study seeks to provide insights into effective water management practices that can minimize the negative impacts of nickel mining on the environment. The data used is the value of rainfall for 10 years (2008 – 2017). The analysis was carried out on rainfall, runoff water discharge, and the rain catchment area. The results showed that the hydrological risk was 95.76% for the 10-year return period, the average rainfall was 119.84 mm, the designed rainfall was 175.85 mm, and the rain intensity was 38.41 mm/hour. The total discharge of runoff water in the north mine is 13.39 m3/sec, the middle is 25.34 m3/sec and the south is 11.02 m3/sec. The settling pond is designed in three working areas, namely the northern (991.72 m2), central (1,877.33 m2), and southern mining (816.241 m2) areas.
Non-Metallic Mineral and Rock Mining Policy Within Metallic Mineral Concession Areas: Analysis and Strategic Recommendations Jumbadi, Jumbadi
Jurnal Indonesia Sosial Sains Vol. 6 No. 8 (2025): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jiss.v6i8.1830

Abstract

Indonesia's position as the world's largest nickel producer, holding 42% of global reserves, has intensified mining activities across Sulawesi. However, recent findings by the Audit Board (BPK) in 2024 revealed systemic exploitation of regulatory loopholes, where non-metallic mineral permits (IUP) for rocks like peridotite and limestone are being misused to extract high-value nickel in Central and Southeast Sulawesi. This practice stems from three critical factors: (1) significantly easier permitting processes for rock commodities (14-day approval) versus metallic minerals (22-day auction system), (2) inadequate verification mechanisms for mineral content in rock concessions, and (3) weak coordination between central and regional oversight bodies. This study examines the multidimensional impacts of such permit misuse through qualitative policy analysis, incorporating geological assessments of nickel-bearing rock formations, comparative evaluation of licensing procedures, and economic modeling of state revenue losses. Findings demonstrate that 5%-10% unauthorized nickel extraction under rock permits could incur state losses of IDR 22.8-45.5 trillion annually, while simultaneously causing environmental degradation and undermining legitimate mining operations. The research proposes tiered policy interventions including real-time monitoring through the MOMI/MODI systems, mandatory nickel content verification for rock permits, and revised commodity classification frameworks. These recommendations aim to reconcile Indonesia's mineral governance with its dual objectives of resource nationalism and sustainable development, particularly crucial as the nation advances its nickel down streaming agenda.
Co-Authors Erwin Setiawan, Erwin Listyani, R.A.T.