Yudho Dwi Galih Cahyono (1), Avellyn Shinthya Sari (2), Maudy Cheisylia Sikopa (3), Regina Warayaan (4)
The high rainfall that occurred throughout 2024 caused the capacity of the existing sedimentation pond to be unable to accommodate it, resulting in water overflowing and flooding the mining area. This study aims to examine the existing drainage system using quantitative and qualitative research methods. Based on the 2014-2023 rainfall analysis, Log Pearson III distribution with a 5-year return period, the planned rainfall was 142.25 mm/day, Rain Intensity 23.31 mm/hour for a rainfall duration of 3.08 hours/day. The total discharge entering the main sump was 7,771 m3/day and was discharged through the sump outlet mouth, connected by a ditch to Settlingpond 8. At this research location, there were 3 trapezoidal ditches namely: Ditch I 1.78 m3/sec, Ditch II 1.85 m3/sec, Ditch III 2.2 m3/sec. The calculation results showed that the main sump and ditch could still accommodate the total incoming discharge. The capacity of Sedimentation Pond 8, with a volume of 7,025 m3, is not sufficient to accommodate the total inflow of 8,293 m3/second and a sedimentation rate of 40-50%. Considering that the research area cannot be expanded due to land limitations, it is necessary to increase the height by 5 meters in the three settling pond compartments to enhance sedimentation efficiency. In addition, it is necessary to add 1 Ebara 200 x 150 FS4NA pump in the last compartment to help discharge water with a total discharge of 8,293 m3/day. The benefit of this research is that it is able to provide recommendations for managing the mine drainage system.
1] A. S. Sari et al., “Designing Open Channel Dimension for Imkasu Area West Papua,” J. Phys. Conf. Ser., vol. 2117, no. 1, p. 012039, Nov. 2021, doi: 10.1088/1742-6596/2117/1/012039.
[2] E. R. Kapugu, A. A. I. A. Adnyano, R. Prastowo, A. Zamroni, M. Kaur, and N. Brahme, “The Effectiveness of Sump Dimension Design: A Case Study in Nickel Mining,” Int. J. Hydrol. Environ. Sustain., vol. 1, no. 1, pp. 41–53, Feb. 2022, doi: 10.58524/ijhes.v1i1.69.
[3] A. S. Sari, Y. D. G. Cahyono, and A. P. P. Kobba, “PENGELOLAAN AIR ASAM TAMBANG (ACID MINE DRAINAGE), MENJADI SUMBER AIR BERSIH DI PT. BUKIT ASAM TBK (STUDI KASUS IUP BANKO BARAT),” J. Inov. Pertamb. dan Lingkung., vol. 4, no. 2, pp. 71–77, Feb. 2025, doi: 10.15408/jipl.v4i2.42497.
[4] C. Hou et al., “Effects of reclamation duration on soil nutrients and enzyme activities in the plough layer and subsoil of riparian floodplains,” CATENA, vol. 228, p. 107143, Jul. 2023, doi: 10.1016/J.CATENA.2023.107143.
[5] J. G. Skousen, A. Sexstone, and P. F. Ziemkiewicz, “Acid Mine Drainage Control and Treatment,” the American Society of Agronomy, Inc. Crop Science Society of America, Inc. Soil Science Society of America, Inc., 2015, pp. 131–168. doi: 10.2134/agronmonogr41.c6.
[6] L. Zhang, J. Wang, Z. Bai, and C. Lv, “Effects of vegetation on runoff and soil erosion on reclaimed land in an opencast coal-mine dump in a loess area,” CATENA, vol. 128, pp. 44–53, May 2015, doi: 10.1016/J.CATENA.2015.01.016.
[7] S. Liang and R. Greene, “A high-resolution global runoff estimate based on GIS and an empirical runoff coefficient,” Hydrol. Res., vol. 51, no. 6, pp. 1238–1260, Dec. 2020, doi: 10.2166/nh.2020.132.
[8] Z. Wei, H. Sun, H. Xu, G. Wu, and W. Xie, “The effects of rainfall regimes and rainfall characteristics on peak discharge in a small debris flow-prone catchment,” J. Mt. Sci., vol. 16, no. 7, pp. 1646–1660, Jul. 2019, doi: 10.1007/s11629-018-5260-3.
[9] J. Luan, Y. Zhang, J. Tian, H. Meresa, and D. Liu, “Coal mining impacts on catchment runoff,” J. Hydrol., vol. 589, p. 125101, Oct. 2020, doi: 10.1016/j.jhydrol.2020.125101.
[10] W. S. Bargawa, A. P. A. Sucahyo, and H. F. Andiani, “Design of coal mine drainage system,” E3S Web Conf., vol. 76, p. 04006, Jan. 2019, doi: 10.1051/e3sconf/20197604006.
[11] M. A. Danasla, G. J. Kusuma, E. J. Tuheteru, and R. S. Gautama, “Hydrology model establishment of pit lake: Extreme event rainfall data analysis,” IOP Conf. Ser. Earth Environ. Sci., vol. 882, no. 1, p. 012048, Nov. 2021, doi: 10.1088/1755-1315/882/1/012048.
[12] J. Horner, “Pump Station Design II: A Tale of Two Pump Stations,” in Volume 1: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain-Based Design and Assessment; Risk and Reliability; Emerging Fuels and Greenhouse Gas Emissions, American Society of Mechanical Engineers, Sep. 2022. doi: 10.1115/IPC2022-81585.
[13] D. C. Vitan, S. Stănilă, I. C. Lăpăduşi (Maceşeanu), and B. Brănişteanu, “Theoretical and experimental research on the possibility of saline water evacuation from the sump of Unirea shaft in Slanic mine,” MATEC Web Conf., vol. 342, p. 02009, Jul. 2021, doi: 10.1051/matecconf/202134202009.
[14] J. P. Paredes-Sánchez, E. Villicaña-Ortíz, and J. Xiberta-Bernat, “Solar water pumping system for water mining environmental control in a slate mine of Spain,” J. Clean. Prod., vol. 87, pp. 501–504, Jan. 2015, doi: 10.1016/j.jclepro.2014.10.047.
[15] S. Alsadilla and E. Wardhani, “Perencanaan Konsep Zero Runoff dengan Menggunakan Sumur Resapan di Perumahan X, Kabupaten Bandung,” J. Tek. Sipil dan Lingkung., vol. 9, no. 2, pp. 147–156, Oct. 2024, doi: 10.29244/jsil.9.2.147-156.
[16] D.-K. Lee, J.-H. Lee, Y.-W. Cheong, and J. Park, “Physical properties of mine drainage sediment according to depth in settling ponds,” Int. J. Mining, Reclam. Environ., vol. 37, no. 2, pp. 148–161, Feb. 2023, doi: 10.1080/17480930.2023.2166248.
[17] F. A. Sairozi, L. Utamakno, and Y. D. G. Cahyono, “Technical Study of Sediment Pond Maintenance Scheduling ( Sediment pond) For Guard Quality Sand Wash PT. Gunung Source Fortune,” J. Appl. Sci. Manag. Eng. Technol., vol. 3, no. 2, pp. 71–78, Dec. 2022, doi: 10.31284/j.jasmet.2022.v3i2.3809.
[18] K. Abood et al., “Characterising sedimentation velocity of primary waste water solids and effluents,” Water Res., vol. 219, p. 118555, Jul. 2022, doi: 10.1016/j.watres.2022.118555.