REKLAMASI LAHAN BEKAS PENAMBANGAN BATU PASIR

Esthi Kusdarini, Imelda Srilestari Mabuat, Fairus Atika Redanto Putri

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Abstrak

CV. BS melakukan penambangan batu pasir yang menyisakan lahan tidak rata dan tandus. Penelitian ini bertujuan: 1) mendapatkan rona awal lahan pertambangan: peruntukan lahan, kelandaian topografi, elevasi, 2)  menentukan rona akhir lahan penambangan: bentuk lahan pasca penambangan, 3) rancangan teknis reklamasi: luas lahan reklamasi, waktu reklamasi, penatagunaan lahan, bentuk penampang dan dimensi saluran drainase, revegetasi, pemeliharaan. Metode yang digunakan adalah pengamatan, wawancara, pengumpulan data sekunder dan perhitungan matematis dengan bantuan tools software. Hasil penelitian menunjukkan bahwa: 1) rona awal area pertambangan berupa pertanian lahan kering dengan vegetasi: rumput liar, kelandaian topografi: 10o – 20o,dan ketinggian elevasi: 41 – 61 mdpl, 2) rona akhir area pertambangan berupa lahan dengan satu jenjang dengan ketinggian 8 m dan kemiringan 60o, 3) luas area reklamasi sebesar 4,42 Ha; penimbunan lahan untuk membentuk teras bangku, selanjutnya dilakukan penebaran tanah pucuk setebal 40 cm atau 17.680 m3, penampang saluran drainase berbentuk trapesium dengan kedalaman (h) 0,5 m, lebar bawah (B) 0,3 m, koefisien dinding saluran (n) 0,03, dan sudut kemiringan (Ɵ) 60o; revegetasi membutuhkan bibit  pohon sengon: 1770 buah dan kacang ruji: 13,26 kg; pemeliharaan membutuhkan pupuk urea: 354 kg dan pupuk kandang: 885 kg.

Kata kunci: batu pasir, reklamasi, sengon.

Abstract

CV. BS carries out sandstone mining which leaves uneven and barren land. This research aims to: 1) obtain the initial baseline of mining land: land use, topographic slope, elevation, 2) determine the final baseline of mining land: post-mining land form, 3) reclamation technical design: area of reclaimed land, reclamation time, land use, shape cross-section and dimensions of drainage channels, revegetation, maintenance. The methods used are observation, interviews, secondary data collection and mathematical calculations with the help of software tools. The research results show that: 1) the initial baseline of the mining area is dry land farming with vegetation: wild grass, topographic slope: 10o – 20o, and elevation height: 41 – 61 meters above sea level, 2) the final baseline of the mining area is land with one level of elevation. 8 m and a slope of 60o, 3) the reclamation area is 4.42 Ha; filling the land to form a bench terrace, then spreading top soil 40 cm thick or 17,680 m3, the cross-section of the drainage channel is trapezoidal with a depth (h) of 0.5 m, bottom width (B) 0.3 m, channel wall coefficient (n) 0.03, and tilt angle (Ɵ) 60o; revegetation requires sengon tree seeds: 1770 fruits and ruji nuts: 13.26 kg; maintenance requires urea fertilizer: 354 kg and manure: 885 kg.

Keywords: sandstone, reclamation, sengon.


Kata Kunci


batu pasir; reklamasi; sengon

Teks Lengkap:

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Referensi


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DOI: https://doi.org/10.26760/rekalingkungan.v11i3.221-233

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