ANALYSIS OF WATER MANAGEMENT IN A COOPER-GOLD MINE DURING THE POST MINING PHASE WITH BIMODAL RAINFALL DISTRIBUTION
The PT XYZ mine, which employs the open pit mining method for copper and gold extraction, is approaching the post-mining phase set to begin in 2033. During the post-mining phase, it is necessary to conduct an analysis and evaluation of the existing drainage system since it will no longer be usabl...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/86294 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The PT XYZ mine, which employs the open pit mining method for copper and gold
extraction, is approaching the post-mining phase set to begin in 2033. During the
post-mining phase, it is necessary to conduct an analysis and evaluation of the
existing drainage system since it will no longer be usable as it was during the
mining operations. The planned drainage system includes a base plan for pit
backfilling, excluding the eastern forest area, using a bimodal rainfall distribution
that affects runoff characteristics. This study aims to analyze the planned drainage
system, analyze the catchment area in the post-mining phase, analyze runoff
hydrographs based on bimodal rainfall patterns, and provide recommendations for
the drainage system design. The methods used include processing rainfall data,
analyzing runoff hydrographs, designing drainage facilities, analyzing the
catchment area in the post-mining phase, and evaluating the design. The research
results indicate that changes in the catchment area are required in several areas.
Additionally, the runoff hydrograph with a bimodal rainfall pattern produces two
peak runoff flows, with the highest flow rate being 150.6 m³/s in the Barakebo
Forest open channel. Recommendations for the drainage system include designing
and dimensioning open channels, drop structures, and culverts to optimize postmining
water management. |
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