EVALUATION OF REVEGETATION PRACTICES IN POST-MINED AREAS OF INDONESIA
With reference to the applicable regulations, mining companies in Indonesia are obliged to reclaim and return a post-mined area into its pre-mining condition. Revegetation, as part of reclamation activity, performs a significant role in rehabilitation of degraded post-mined areas to productive land uses. Therefore, this study aimed to evaluate revegetation performance in post-mined areas in Indonesia, which was carried out by two coal mining companies in South Sumatra and East Kalimantan; and two mineral mining companies in West Java and South Sulawesi. The success parameters were determined with scores based on applicable regulations from the Government of Indonesia (GOI) and tree growth parameters (stem diameter, total height, and basal area). The parameters set by GOI included revegetation realization, survival rate, plant density, plant health, species composition and rotation length. The four mining companies applied a two-phase planting method. Enterolobium cyclocarpum was mostly planted for the first phase; while for the second phase, slow growing and native species such as Intsia palembanica, Syzygium polyanthum, Shorea spp. and Elmerrillia tsiampaca were planted. The measurement results of tree height, stem diameter and basal area varied in each of the assessed reclaimed sites of different ages. The highest stem basal area was observed in an 11-year-old stand of the Mining Company in South Sulawesi with 57.6 m2ha-1. The evaluation scores based on the regulations for all assessed reclaimed sites ranged from 15 to 25 out of 25 possible points. The implementation of revegetation practices in the field depended much on the company’s ventures being in compliance with the regulations.
Key words: Mining, reclamation, rehabilitation, reforestation, success parameters
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