Electronic Theses and Dissertation

Reklamasi merupakan kewajiban perusahaan tambang untuk memulihkan fungsi lahan terganggu akibat penambangan, dengan revegetasi sebagai indikator utama keberhasilannya. Penelitian ini bertujuan mengevaluasi keberhasilan revegetasi pada lahan reklamasi PT XYZ, Kabupaten Nagan Raya, Aceh, melalui integrasi data pengamatan lapangan dan analisis Soil Adjusted Vegetation Index (SAVI) dari citra Sentinel-2 pada area reklamasi tahun 2018 – 2025. Data lapangan meliputi diameter batang, tinggi pohon, tutupan tajuk (hemispherical photography), klorofil daun (image analysis), dan pH tanah, dievaluasi berdasarkan Kepmen ESDM No. 344.K/MB.01/MEM.B/2025 serta dibandingkan dengan penelitian pertumbuhan sengon pada lokasi reklamasi tambang batubara lain. Hasil menunjukkan persentase keberhasilan pertumbuhan tanaman pada seluruh area reklamasi berkisar antara 16,41 – 35,60%, dengan capaian tertinggi pada area 2022, namun secara keseluruhan tidak satu pun area yang memenuhi standar minimum kategori Sedang (70%) menurut Kepmen ESDM No. 344.K/MB.01/MEM.B/2025. Tutupan tajuk maksimum hanya 65% (2022), jauh di bawah standar ≥ 90%. Nilai SAVI bervariasi dari kategori sedang hingga sangat rapat (0,43 – 0,71) dan tidak selalu sejalan dengan persentase pertumbuhan aktual; pada area muda (2025), nilai SAVI tinggi didominasi kontribusi cover crop, bukan tanaman pionir. Diameter batang dan tinggi pohon area tua (2018 – 2020) sesuai rentang ukuran dari literatur, sedangkan pH tanah yang didominasi kategori moderately (5,6–6) – strongly acidic (5,1–5,5) teridentifikasi sebagai salah satu faktor pembatas pertumbuhan. Penelitian ini merekomendasikan intensifikasi pemeliharaan dan perbaikan kualitas tanah guna mendukung keberhasilan revegetasi PT XYZ.

Reclamation is a legal obligation for mining companies to restore land disturbed by mining activities, with revegetation as a key success indicator. This study evaluates revegetation success at PT XYZ's reclaimed mining land in Nagan Raya Regency, Aceh, by integrating field data with Soil Adjusted Vegetation Index (SAVI) analysis from Sentinel-2 imagery across reclamation areas planted between 2018 and 2025. Field data include stem diameter, tree height, canopy cover (hemispherical photography), leaf chlorophyll (Petiole Pro), and soil pH, assessed against Decree No. 344.K/MB.01/MEM.B/2025 and compared with prior sengon growth studies at other coal reclamation sites. The results show that the percentage of successful plant growth in all reclamation areas ranges from 16.41 - 35.60%, with the highest achievement in the 2022 area, but overall none of the areas meet the minimum standard of the medium category (70%) according to Decree's standard. Maximum canopy cover was only 65% (2022), below the required ≥90%. SAVI values ranged from Moderate to Very Dense (0.43 – 0.71) and did not always align with actual growth percentages; the youngest area's (2025) high SAVI was driven by cover crop rather than pioneer species. Diameter and height in older areas (2018 – 2020) generally literature ranges, while moderately (5,6-6) to strongly (5,1-5,5) acidic soil was a limiting factor in certain areas. Intensified maintenance and soil quality improvement are recommended to support revegetation success at PT XYZ.