HIDAYAH, AJI LAMBANG (2022) RANCANGAN TEKNIS SISTEM PENYALIRAN TAMBANG PADA TAMBANG BATUGAMPING DI DESA BEDOYO, KECAMATAN PONJONG, KABUPATEN GUNUNGKIDUL DAERAH ISTIMEWA YOGYAKARTA. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
v
RINGKASAN
Penelitian ini dilakukan di Blok 1 Putih CV Kusuma Arga Mukti yang
berlokasi di Desa Bedoyo, Kecamatan Ponjong, Kabupaten Gunungkidul, Daerah
Istimewa Yogyakarta. Pada saat hujan maka air hujan yang jatuh mengalir ke jalan
tambang serta ke sekeliling bukaan tambang yang letaknya lebih rendah, dan saat
kemarau (panas) tidak ada air hujan yang masuk ke area penambangan. Terutama
pada Blok 1 yang akan dilakukan kegiatan penambangan, saat ini belum ada sistem
penyaliran tambang, oleh karena itu akan dipersiapkan rancangan sistem penyaliran
tambang.
Berdasakan hasil analisis data curah hujan 2011 – 2020 perhitungan metode
Gumbell diperoleh curah hujan rencana sebesar 111,28 mm/hari, intensitas 38,58
mm/jam sedangkan berdasarkan perhitungan metode Thomas Fiering modifikasi
bilangan acak menggunakan metode Wilson-Hilferty Transformation diperoleh
curah hujan rencana sebesar 105 mm/hari, intensitas 36,27 mm/jam dengan periode
ulang 3 tahun dan resiko hidrologi sebesar 86,8%. Daerah tangkapan hujan pada
lokasi dibagi menjadi tiga bagian, yaitu sebagai berikut : DTH 1 = 0,0152 km2,
DTH 2 = 0,0146 km2, dan DTH 3 = 0,006 km2. Total debit air limpasan perhitungan
metode Gumbell sebesar 0,24m3/detik dan perhitungan metode Thomas Fiering
modifikasi bilangan acak menggunakan metode Wilson-Hilferty Transformation
sebesar 0,23 m3/detik.
Selanjutnya Saluran terbuka dirancang untuk mengalirkan air hujan yang
masuk ke area penambangan dan mengalirkan air limpasan agar tidak menggenangi
jalan tambang. Terdapat saluran terbuka 1 dengan dimensi b = 0,40 m; B = 0,20 m;
d = 0,20 m; h = 0,17 m; a = 0,70 m; saluran terbuka 2 dengan dimensi b = 0,80 m;
B = 0,20 m; d = 0,45 m; h = 0,35 m; a = 0,50 m; dan saluran terbuka 3 dengan
dimensi b = 1,10 m; B = 0,60 m; d = 0,60 m; h = 0,50 m; a = 0,65 m. Kumpulan air
tambang dari Saluran terbuka sebelum dialirkan ke sungai dijernihkan terlebih
dahulu pada kolam pengendapan. Kolam pengendapan dirancang terdiri dari
3 kompartmen dengan luas 96 m2 dan volume 180 m3. Pembersihan (pengerukan)
endapan pada kolam pengendapan harus dilakukan setiap 1 tahum 1 bulan 1 hari
sekali.vi
SUMMARY
This research was conducted at Currently, Blok 1 Putih CV Kusuma Arga
Mukti located in Bedoyo Village, Ponjong District, Gunungkidul Regency, Special
Region of Yogyakarta. In raining condition, the runoff can potentially disrupt
mining which located at lower area, and during drought there is no rain into the
mining area. Especially on the Blok 1 that will be done mining activities, there is
currently no mine drainage system, therefore it will be prepared the design of mine
drainage system.
Based on data analysis results of rainfall in 2011 - 2019 with the calculation
of the Gumbell method, the plan rainfall was 111,28 mm/day, with the intensity
38,58 mm/hour, while the calculation by the Modified Thomas Fiering WilsonHilferty Transformation method was obtained 105 mm/day plan rainfall, intensity
36.27 mm/hour with a return period of 3 years and 86,8% of hydrological risk. The
rain catchment area was divided into 2 sections, as follows: DTH 1 = 0,015 km2,
DTH 2 = 0,015 km2, and DTH 3 = 0,006 km2. Total run-off water flow calculation
by Gumbell method was 0,24 m3/sec and calculation of the Modified Thomas
Fiering Wilson-Hilferty Transformation method was 0,23 m3/sec.
Furthermore it is necessary to develop open channel around the perimeter
mine site to restrain rainwater from entering the mining area and canalize the
runoff from disturbing the mine roads. There are the open channels dimension Open
Channel 1: dimention b = 1,20 m; B = 0,60 m; d = 0,60 m; h = 0,50 m;
a = 0,70 m; Open Channel 2 dimention b = 0,80 m; B = 0,20 m; d = 0,45 m;
h = 0,35 m; a = 0,50 m; and Open Channel 3 dimention b = 1,10 m; B = 0,60 m;
d = 0,60 m; h = 0,50 m; a = 0,6 m. The runoff water from the open channel, before
streamed into the river, have to be clear into the settling pond. Settling pond designs
consist of 3 compartments with total area of 96m2 and 180m3 of volume. The
maintenance to dredge out the sediment from settling pond is required every 1 years
1 months 1 days.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | RANCANGAN TEKNIS SISTEM PENYALIRAN TAMBANG PADA TAMBANG BATUGAMPING D |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 03 Feb 2022 04:28 |
| Last Modified: | 14 Jun 2023 06:32 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/28182 |
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