Analisis Neraca Air Limbah Sump PT Victor Dua Tiga Mega, Kabupaten Barito Utara, Kalimantan Tengah

Ryan Andreas R Saragih; Shalaho Dina Devy; Ardhan Ismail; Harjuni Hasan; Revia Oktaviani

doi:10.55606/srj-yappi.v4i4.2877

Authors

Ryan Andreas R Saragih Universitas Mulawarman
Shalaho Dina Devy Universitas Mulawarman
Ardhan Ismail Universitas Mulawarman
Harjuni Hasan Universitas Mulawarman
Revia Oktaviani Universitas Mulawarman

DOI:

https://doi.org/10.55606/srj-yappi.v4i4.2877

Keywords:

Pumping System, Sediment Discharge, Sump Capacity, Total Suspended Solid, Water Balance

Abstract

The open-pit mining system at Pit 7C PT Victor Dua Tiga Mega forms a depression that accumulates water from surface runoff and groundwater, requiring effective water management through sump and pumping systems. This study aims to analyze the water balance of the sump by calculating inflow discharge, sediment discharge, sump capacity, pump performance, and overall water equilibrium. Secondary data analysis includes 10-year rainfall data, catchment area delineation using Global Mapper, and MFC-160 pump specifications. Rainfall analysis using the Gumbel distribution produced R₂₄ of 213.973 mm. Total inflow to the sump reached 5,052.29 m³/day, dominated by surface runoff (4,965.89 m³/day) with groundwater contribution (86.40 m³/day). Sediment discharge during rainy conditions (17.13 m³/day) was higher than dry conditions (6.54 m³/day), with average TSS concentrations of 406.73 mg/L and 155.36 mg/L, respectively. TSS values during the rainy season exceeded the quality standard of 400 mg/L. Based on the 84-hour rainfall duration according to ESDM Regulation No. 1827 K/30/MEM/2018, the required sump capacity was 19,656.17 m³, necessitating an increase in sump depth from 3 m to 5.22 m. The MFC-160 pump delivered 4,550.68 m³/day with a pumping duration of 1.11 days, leaving a residual water volume of 487.58 m³/day after evaporation (6.79 m³/day) and infiltration (7.24 m³/day). The water balance analysis indicates that current pumping capacity is insufficient to completely drain the sump, requiring additional pumping units, sump dimension optimization, and improved sediment management strategies, particularly during the rainy season when TSS concentrations peak.

References

Afrizal, R., Misdiyanta, P., & Mohamad, M. A. (2022). Kajian Teknis Sistem Mine Drainage Pada Tambang Terbuka Batubara di PT Sims Jaya Kaltim. Mining Insight, 3(1), 33–42.

Arsyad, S. (2010). Konservasi Tanah dan Air (2nd ed.). Bogor: IPB Press.

Asdak, C. (2010). Hidrologi dan Pengolahan Daerah Aliran Sungai. Yogyakarta: Universitas Gajah Mada.

Atmaja, D. M. (2019). Kajian Inflow , Outflow Dan Water Balance Danau Beratan Di Dataran Tinggi Bedugul Bali. 20(1).

Gautama, R. S. (1999). Sistem Penyaliran Tambang. ITB Press, Vol. 03, pp. 95–104.

Gray, J. R., & Simões, F. J. M. (2008). Estimating Sediment Discharge. Dalam: Sedimentation Engineering: Processes, Measurements, Modeling, and Practice. American Society of Civil Engineers (ASCE)., 1067–1088.

Harto B, S. (1993). Analisis Hidrologi . Jakarta: Gramedia Pustaka Utama.

Juan, J., Shalaho Dina Devy, Revia Oktaviani, Tommy Trides, & Ardhan Ismail. (2025). Studi Kasus Sistem Penyaliran Tambang atubara PT. Bukit Baiduri Energi Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur. Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan, 3(3), 77–87. https://doi.org/10.61132/globe.v3i3.948

Kamiana, I. M. (2010). Teknik Perhitungan Debit Rencana Bangunan Air. Yogyakarta: Graha Ilmu Yogyakarta.

Puradimaja, D. , J., & Irawan, D. , E. (1993). Hidrogeologi Umum : Kelompok Keahlian Geologi Terapan. Bandung.

Saismana, A. (2014). Evaluasi Sistem Pengairan Tambang Batubara Pada Pit Block B di Pi Minemex Indonesia Kabupaten Sarolangun Jambi. Jurnal Bina Tambang, 5(1), 9–117.

Sosrodarsono, S. (2003). Hidrologi Untuk Pengairan. Jakarta: Paradnya Paramita. .

Suwandhi, A. (2004). Perencanaan Sistem Penyaliran Tambang : Diklat Perencanaan Tambang Terbuka. Bandung: Universitas Islam Bandung.

Syarifuddin, S., Widodo, S., & Nurwaskito, A. (2017). Kajian Sistem Penyaliran Pada Tambang Terbuka Kabupaten Tanah Bumbu Provinsi Kalimantan Selatan. Jurnal Geomine, 5(2), 84–89. https://doi.org/10.33536/jg.v5i2.132

Usman, K. O. (2014). Analisis Sedimentasi pada Muara Sungai Komering Kota Palembang. Journal of Civil and Environmental Engineering, 2(2). https://doi.org/10.21831/gm.v18i1.30038