PRATAMA, YUDHA PUTRA (2016) KAJIAN HIDROGEOLOGI DI WILAYAH IUP PT. METRO ENERGY KECAMATAN KURUN KABUPATEN GUNUNG MAS PROVINSI KALIMANTAN TENGAH. Other thesis, UPN 'VETERAN" YOGYAKARTA.
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Abstract
PT. Metro Energy merupakan perusahaan pertambangan batubara yang
berada di Kecamatan Kurun, Kabupaten Gunung Mas, Provinsi Kalimantan
Tengah yang sedang melakukan kegiatan eksplorasi dan merencanakan kegiatan
pertambangan dengan sistem tambang terbuka. Sebelum melaksanakan tahapan
kegiatan pertambangan selanjutnya perlu dilakukan kajian hidrogeologi yang
meliputi kondisi curah hujan, debit air limpasan, sifat hujan, uji akuifer,
karakteristik akuifer, potensi airtanah, dan analisi conto air.
Data curah hujan diperoleh dari Dinas Pekerjaan Umum Provinsi
Kalimantan Tengah, Stasiun Pengukuran Palangka Raya - Sungai Kahayan dari
tahun 2002-2011. Curah hujan tahunan berkisar antara (1.165 – 2.852) mm dan
hari hujan (83 – 243) hari, daerah penelitian termasuk wilayah dengan curah hujan
tinggi.
Di daerah penelitian terdapat 3 Daerah Tangkapan Hujan (DTH), yaitu
DTH I, DTH II, dan DTH III. Nilai debit air limpasan di masing-masing DTH
dibedakan berdasarkan periode ulang hujannya yaitu periode ulang hujan 5 tahun
dan 10 tahun. Pada DTH I nilai debit air limpasannya masing-masing adalah
sebesar 15,78 m
3
/detik dan 25,20 m
3
/detik, untuk DTH II masing-masing adalah
3,32 m
3
/detik dan 5,46 m
3
/detik, serta untuk DTH III adalah 0,34 m
3
/detik dan
0,54 m
3
/detik.
Parameter akuifer di lokasi penelitian diperoleh dengan melakukan uji
akuifer di lapangan menggunakan metode slug test pada 3 lubang bor.
Berdasarkan hasil slug test diketahui nilai permeabilitas (k) akuifer berkisar (2,93
x 10
-7
– 1,18 x 10
-6
) m/detik, sehingga dikategorikan memiliki nilai konduktivitas
rendah (low) hingga sedang (moderate). Dari hasil perhitungan, diperoleh debit
airtanah sebesar (0,572 – 1,15) liter/detik. Berdasarkan Keputusan Menteri ESDM
Mineral 145/K/10/MEM/2000 Tentang Pedoman Teknis Evaluasi Potensi Air
Bawah Tanah, nilai debit airtanah tersebut masuk pada kategori kecil (debit < 2,0
liter/detik).
Berdasarkan hasil analisis conto air dengan berpedoman kepada Peraturan
Pemerintah No. 82 Tahun 2001 dan Keputusan Menteri Lingkungan Hidup No.
113 Tahun 2003, kualitas air di lokasi penelitian secara umum termasuk baik.
PT Metro Energy is the mining company located in Kurun district,
Gunung Mas regency, Central Borneo which is exploring and planning coal
mining by conducting surface mining system. Before executing the next stage of
mining operations , it is necessary to be undertaken including hydrogeology form
study, run-off discharge, groundwater potential, aquifer test, rainfall aquifer
characteristics and water samples analysis.
As the perceived data, the annual precipitation was about 1.165 – 2.852
mm gained from 83 – 243 rainy days per year, and categorized as high rainfall
intensity. It was collected since 2002 to 2011 and obtained from Climatology
Station of Palangka Raya – Kahayan River of Public Works Department of
Central Borneo.
In this research, there are 3 (three) Rainfall Catchment Areas (RCA) which
are RCA I, RCA II and RCA III. Run-off discharge point from each RCA is
distinguished based on rainfall return period. The results of 5 (five) and 10 (ten)
years rainfall return periods in RCA 1 are 15,78 m
3
/s and 25,20 m
3
/s. For RCA II
are 3,32 m
3
/s and 5,46 m
3
/s. Belonging to RCA III are 0,34 m
3
/s and 0,54 m
3
/s.
Aquifer parameter in such research location is attained by employing
aquifer test specifically using slug test method on 3 drilling holes. According to
field aquifer test, it is known that the aquifer permeability value is about (2,93 x
10
-7
– 1,18 x 10
-6
) and categorized as low to moderate conductivity grade.
Furthermore, it is also figured out that the groundwater discharge is (0,572 –
1,15) liter/s and in pursuance of Minister of Energy and Mineral Resources
Provision 145/K/10/MEM/2000 related to guidance for groundwater potential
evaluation technique, this numeral is included to low groundwater potential
(discharge < 2,0 liter/s).
Based on the results of the analysis of water samples by referring to
Government Regulation No. 82 year 2001 and Minister of Environmental Affair
decree no. 113 year 2003, waters quality at the research area are in normal states.
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 16 May 2016 03:26 |
| Last Modified: | 16 May 2016 03:26 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/952 |
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