Batu Hijau mine pit is known as one of the largest copper pit mine in Nusa
Tenggara Barat, Indonesia. Similiar as other copper mine pits in Indonesia, This site also
faces acid mine water (AMD) problem. Based on the mine management plan, the AMD
generated from this pit is being collected into Santong ponds in the southwest of the pit
located in the upstrean area if Sejorong watershed. By the next decade, Batu Hijau mine
will be in the closure mine period and it is important to understand the probable movement of AMD under the Santong ponds whether the AMD leaked to groundwater or not.
This research aims to develop a numerical model of groundwater flow and predict the
movement of AMD by applying particle tracking method. Secondary and primary data
of geology, hydrology, and hydrogeology. Also, groundwater pumpage discharge information was collected and analysed to develop hydrogeological conceptual model and the
numerical model. The conceptual model of hydrogeological system in the research area
is known to be built on unconfined aquifer system from a combination of weathered and
fractured volcanic rocks in the upstream to middle part of watershed and majorly by alluvial and coastal deposits in the downstream area. The thickness of aquifer is vary between
20 to about 300 m and divide into 5 layers in the numerical model, with hydraulic conductivity ranges between 5 to 100 m/day and groundwater recharge is vary between 180 to
700 mm/year from downstream to upstream of watershed. Groundwater flow boundaries
in the Sejorong watershed are mainly controlled by topographical feature as water divide
boundaries and the existing of Sejorong parennial rivers in the middle of this watershed.
Steady state particle tracking results from the numerical groundwater flow model show
AMD from Santong ponds may migrate in groundwater only to a distance of about 500
m to the downstream and therefore it is unlikely that AMD seepages from Santong pond
may contaminate water in the production wells.
Rumpun Ilmu
Geologi
Bahasa Asli/Original Language
English
Level
Nasional
Status
Dokumen Karya
No
Judul
Tipe Dokumen
Aksi
1
Daftar isi JAG Vol 4, No 2 (2019).pdf
[PAK] Daftar Isi
2
Editorial Team JAG 2019.pdf
[PAK] Halaman Editorial
3
53200-156265-2-PB (1).pdf
[PAK] Full Dokumen
4
Sertifikat JAG.pdf
Dokumen Pendukung Karya Ilmiah (Hibah, Publikasi, Penelitian, Pengabdian)
5
Acceptance_Letter-Rianda_et_al.pdf
Bukti Accepted
6
Groundwater Flow Modeling at Sejorong Watershed.pdf
Dokumen Pendukung Karya Ilmiah (Hibah, Publikasi, Penelitian, Pengabdian)
