Irwan Iskandar

2021
Team Leader – Desk Study on Alternative Locations for a Tailing Storage Facility (TSF), PT. Indonesia Konawe Industrial Park
Team Leader – Water Supply Study, Laman Mining, West Kalimantan
Team Leader – Geohazard Study for Road Assessment, PT. Sumbawa Timur Mining-Vale

2020
Principal Hydrogeologist – Study on Hydrology, Hydrogeology, and Relocation of Backfilling Tailing, PT. Indo Muro Kencana (IMK)
Team Leader – Hydrology and Geotechnical Investigation of a Tailing Dam, PT. Indonesia Konawe Industrial Park
Team Leader – Hydrology, Hydrogeology, and Geotechnics of a Dry Tailing Storage Facility (DTSF), HPAL, Halmahera Persada Lygend, Harita Group
Team Leader – Engineering Design of a Dry Tailing Storage Facility (DTSF), HPAL, Halmahera Persada Lygend, Harita Group
Team Leader – Pre-Feasibility Study of Shore Reclamation Using Slurry, PT. Halmahera Persada Lygend, Harita Group

2019
Team Leader – Investigation and Engineering Design of a Residual Storage Facility, PT. Indonesia Konawe Industrial Park, Konawe
Team Leader – Hydrology and Hydrogeology Study of the Sihayo Pit Gold Mine, PT. Sorikmas Mining
Team Leader – Hydrology, Hydrogeology, and Geotechnical Study of Tailing Storage Facilities (TSF), PT. Halmahera Persada Lygend
Team Leader – Geology and Geochemical Study of the Klabat-Wineru Geothermal Area, Bitung, North Sulawesi (for Ormat Geothermal)

2018
Team Leader – Hydrogeological, Hydrogeochemical, and Isotope Study of Springs, TBP Nickel Mine, Obi Island
Team Leader – Hydrology and Hydrogeological Study of Tailing Displacement, PT. SCM (Weda and Morowali)
Team Leader – Hydrogeological Analysis of Tailing Displacement, HPAL PT. HPL (Obi Island)
Team Leader – Hydrogeology and Hydrogeochemical Study of a Tailing Storage Facility (TSF), Paiton PLTU Area

2017
Principal Hydrogeologist/Hydrogeochemist – Hydrogeological Study for a Tailing Storage Facility (TSF), Penjom Gold Mine, J-Resources (Malaysia)
Hydrogeologist – Hydrogeological Study, Natarang Gold Mine, Sumatra
Hydrogeologist – Geotechnical and Hydrogeological Study, Mandiri Inti Perkasa Coal Mine
Hydrogeologist – Hydrogeological Study, Pani Gold Mine, J-Resources, Sulawesi

2016
Hydrogeologist – Hydrogeological Study for a Tailing Storage Facility (TSF), Gold Mine, PT. Indo Muro Kencana (IMK)
Hydrogeologist – Hydrogeological Study, PT. Sago Prima Pratama Gold Mine, J-Resources (2015-2016)

2015
Hydrogeologist – Hydrogeological and Land Subsidence Study of Jakarta
Consultant – Environmental Impact Assessment, RS Al-Ihsan, Bandung
Hydrogeologist – Hydrogeological Study for a Tailing Storage Facility (TSF), Gold Mine, PT. Kasongan Bumi Kencana

2014-2015
Hydrologist-Hydrogeologist – Hydrology and Hydrogeological Study, PT. Indocement Tunggal Prakasa, Citeureup
Hydrogeochemist – Hydrogeology and Hydrogeochemical Study of a CMTF, PT. Chevron Pacific Indonesia
Hydrologist-Hydrogeologist – Environmental Impact Assessment, Indonesia Morowali Industrial Park, Morowali
Member – Indonesian Over Pressure Study (INOV), SKK Migas – LAPI ITB (2014 – Present)

2014
Hydrologist-Hydrogeologist – Hydrology and Hydrogeological Study of River Pabilahan Diversion, PT. Arutmin

2013
Hydrologist-Hydrogeologist – Environmental Impact Assessment (AMDAL), PT. Indocement Tunggal Prakasa, Citeureup, Bogor
Hydrologist-Hydrogeologist – Hydrogeological Study, PT. Newmont Nusa Tenggara, Sumbawa (2012-2013)
Hydrologist-Hydrogeologist – Feasibility Study of a Coal Mine, PT. Kideco Jaya Agung
Consultant – Groundwater Resources Master Plan, Eromoko Basin, Wonogiri
Consultant – Mine Plan Design and Hydrogeological Study, Semen Indonesia Tuban
Hydrogeologist – Groundwater Modeling in Asam-Asam Pit, PT. Arutmin (2013-2014)
Course Instructor – Hydrogeological Course, Perhapi (2013, 2014, 2015)
Course Instructor – Mining Hydrogeological Course, LAPI ITB (2013-2017)

2012
Hydrologist-Hydrogeologist – Geotechnical and Hydrogeological Study of a Coal Mine, PT. Piranti Jaya Utama
Hydrologist-Hydrogeologist – Geotechnical and Hydrogeological Study of a Coal Mine, PT. Rinjani Kertanegara
Hydrologist-Hydrogeologist – Feasibility Study of a Coal Mine, PT. Gerbang Daya Mandiri
Hydrologist-Hydrogeologist – Feasibility Study & Baseline Hydrology/Hydrogeology, PT. Indocement Tunggal Prakasa, Palimanan
Hydrologist-Hydrogeologist – Environmental Impact Assessment (AMDAL), PT. Indocement Tunggal Prakasa, Palimanan, Cirebon

2011-2013
Hydrologist-Hydrogeologist – Hydrogeology for Water Management, Dairi Prima Mineral, North Sumatra

2011
Consultant – Sulfate Water Study, PT. Newmont Minahasa Raya
Hydrologist-Hydrogeologist – Geotechnical and Hydrogeological Study of a Quarry, PT. Semen Cibinong
Hydrologist-Hydrogeologist – Geotechnical and Hydrogeological Study of Coal Mines, PT. Batuah Energi Prima, PT. Bhakti Energi Persada, PT. Gunung Bara Utama
Hydrogeologist – Hydrogeological Study of a Coal Mine, PT. Adaro
Hydrologist-Hydrogeologist – Environmental Impact Assessment of a Coal Mine, PT. Adaro
Consultant – Mine Plan, Geotechnical and Hydrogeology of a Quarry, PT. Semen Gresik, Rembang

2007
Consultant – Hydrology and Hydrogeological Study, PT. INCO Sorowako (LAPI-ITB)

2006
Consultant – Mine Plan and Hydrogeological Study at a Limestone Quarry, PT. HOLCIM Indonesia
Consultant – Master Plan of Mineral Resources, West Kalimantan Province (LPPM-ITB)

2005
Consultant – Hydrogeological Study and Design of Groundwater Wells, PT. KPC Coal Mine (LPPM-ITB)
Consultant – Hydrogeological Study for Artificial Recharge, University of Indonesia Campus (Ristek-BPPT)

2004
Consultant – Mineralogy and Hydrogeological Study in a Nickel Mine, PT. INCO Sorowako, South Sulawesi (LAPI-ITB)

Under Review

1. Iskandar, I., Al Hakim, A.Y., Musti’atin, Aprillia, P., Koike, K., Kubo, K., & Notosiswoyo, S. Investigation of Geothermal Systems in Patuha, Indonesia: Evidence from Soil Gas Radon and Mercury Analyses, Gas Compositions, Dissolved Rare Earth Elements, and Stable Water Isotopes. Natural Resources Research.

2020
2. Shoedarto, R.M., Tada, Y., Kashiwaya, K., Koike, K., & Iskandar, I. (2020). Specifying recharge zones and mechanisms of the transitional geothermal field through hydrogen and oxygen isotope analyses with consideration of water-rock interaction. Geothermics, *86*, 101797.
3. Yudi Rahayudin, Y., Kashiwaya, K., Tada, Y., Iskandar, I., Koike, K., Atmaja, R.W., & Herdianita, N.R. (2020). On the origin and evolution of geothermal fluids in the Patuha Geothermal Field, Indonesia based on geochemical and stable isotope data. Applied Geochemistry, *114*, 104530.

2018
4. Iskandar, I., Dermawan, F.A., Sianipar, J.Y., Suryantini, & Notosiswoyo, S. (2018). Characteristic and Mixing Mechanisms of Thermal Fluid at the Tampomas Volcano, West Java, Using Hydrogeochemistry, Stable Isotope and ²²²Rn Analyses. Geosciences, *8*(4), 103.
5. Taufiq, A., Hosono, T., Iskandar, I., Effendi, A.J., & Hutasoit, L.M. (2018). Estimating Groundwater Mixing Ratios from Vertical Flux Processes due to Excessive Groundwater Pumping Using Hydrogeochemical Parameters and Nitrate Concentrations in the Bandung Basin, Indonesia. Geologia Croatica, *71*(3).
6. Taufiq, A., Hosono, T., Ide, K., Kagabu, M., Iskandar, I., Effendi, A.J., Hutasoit, L.M., & Shimada, J. (2018). Impact of excessive groundwater pumping on rejuvenation processes in the Bandung basin (Indonesia) as determined by hydrogeochemistry and modeling. Hydrogeology Journal, *26*(4). https://doi.org/10.1007/s10040-018-1728-z
7. Book Chapter: Pramudita, D., Iskandar, I., & Indarto, A. (2018). Nano-Enhanced Materials for Reclamation of Mine Spoils. In Bio-Geotechnologies for Mine Site Rehabilitation (pp. 201–214). Elsevier.

2017
8. Iskandar, I., Farazi, H., Fadhilah, R., Purnandi, C.P., & Notosiswoyo, S. (2017). Groundwater and Solute Transport Modeling at Hyporheic Zone of Upper Part Citarum River. IOP Conference Series: Earth and Environmental Science, *71*, 012011.
9. Sudarningsih, Bijaksana, S., Ramdani, R., Hafidz, A., Pratama, A., Widodo, Iskandar, I., Fajar, S., Dahrin, D., & Santoso, N. (2017). Variations in the Concentration of Magnetic Minerals and Heavy Metals in Suspended Sediments from Citarum Rivers and Its Tributaries, West Java, Indonesia. Geosciences, *7*(3), 66.
10. Sudarningsih, Maulana, L., Bijaksana, S., Hafidz, A., Pratama, A., Widodo, & Iskandar, I. (2017). Magnetic Characterisation of Sand and Boulder Samples from Citarum River as Baseline for Magnetic Analyses of Riverine Environment in Volcanic Areas. Journal of Mathematics and Fundamental Sciences, *49*(2), 116–126.

2012
11. Iskandar, I., & Koike, K. (2012). Identifying Groundwater Arsenic Contamination Mechanisms in Relation to Arsenic Concentrations in Water and Host Rocks. Environmental Earth Sciences, *65*, 2015–2026. DOI: 10.1007/s12665-011-1182-x
12. Notosiswoyo, S., Iskandar, I., Gautama, R.S., Soeprapto, R.P., Gultom, T., Sompie, D., & Andrawina, K.N. (2012). Early Step to Prevent Environmental Impacts in Mining Project Case Studies: Mine Water Management in Messel Gold Mine, Minahasa, North Sulawesi and Sorowako Lateritic Nickel Mine, Luwu, South Sulawesi, Indonesia. Kyushu University Global COE Program Journal of Novel Carbon Resource Sciences, *5*, 28–32.

2011
13. Iskandar, I., & Koike, K. (2011). Distinguishing Potential Sources of Arsenic Released to Groundwater around a Fault Zone Containing a Mine Site. Environmental Earth Sciences, *63*, 595–608. DOI: 10.1007/s12665-010-0727-8
14. Notosiswoyo, S., & Iskandar, I. (2011). Contribution of Coal Mine and Coal Fired Plant to CO₂-Emission in Indonesia. Journal of Novel Carbon Resource and Science, *4*, 17–20.

2010
15. Ako, A.A., Shimada, J., Ichiyanagi, K., Koike, K., Hosono, T., Eyong, G.E.T., & Iskandar, I. (2010). Isotope Hydrology and Hydrochemistry of Water Resources in The Banana Plain (Mungo Division) of The Cameroon Volcanic Line. Journal of Environmental Hydrology, *18*(4), 1–20.

Conference Proceedings & Abstracts

2016
16. Iskandar, I., Purnandi, C.P., Arifin, A.P., Notosiswoyo, S., Kashiwaya, K., Tada, Y., & Koike, K. (2016). Hydrochemical Characterization for Identifying Hydrothermal Systems in the Bandung Volcanic Basin. Proceedings of the 41st Stanford Geothermal Workshop, Stanford.
17. Purwanti, F., Iskandar, I., & Ramdhan, A.M. (2016). Non Isothermal Groundwater Flow in Geothermal Area: A Case Study of Mt. Rajabasa, Lampung. Proceedings of the 43rd IAH International Congress, Montpellier.
18. Musti’atin, Setiabudi, A., Iskandar, I., & Ramdhan, A.M. (2016). Hydrogeochemical Study to Determine Active Hydrodynamic Flow in Hydrocarbon Reservoir: The Case Study of Central Sumatra Basin. Proceedings of the 43rd IAH International Congress, Montpellier.

2015-2014
19. Iskandar, I., Paladan, A., Pratama, R.N.A., & Notosiswoyo, S. (2015). Predicting the Potential of Groundwater Mining in Industrial Area Cidahu, Sukabumi, Indonesia Using Numerical Modeling. Proceedings of the International Symposium on Earth Science and Technology 2014.
20. Iskandar, I., Wibowo, A., Widodo, L.E., Casanova, B., & Notosiswoyo, S. (2014). A 3D Model of Hydraulic Conductivity Distribution of Fractured Rocks Using Packer Test Result and Geotechnical Log. Proceedings of the International Symposium on Earth Science and Technology 2014.
21. Widodo, L.E., Widijanto, E., Iskandar, I., & Notosiswoyo, S. (2014). Modeling Development of Mud Deposit for Assessment of Mud Rush Potential in Block Cave Mine. Proceedings of the International Symposium on Earth Science and Technology 2014.
22. Iskandar, I., Septianto, C.P., & Notosiswoyo, S. (2014). Hydrogeochemistry and Genesis of Springs and Hot Springs Around Bandung Volcanic Basin, Related with Release and Sink of Dissolved Metals. Proceedings of the International Symposium on Earth Science and Technology 2014.
23. Cahyadi, T.A., Notosiswoyo, S., Widodo, L.E., & Iskandar, I. (2014). Distribusi Sebaran Konduktivitas Hidraulik Dari Hasil Uji Akuifer – Constant Head Permeabilitas Pada Batuan Sedimen Secara Heterogen. Proceedings of TPT XXIII PERHAPI, Makassar.

2012
24. Iskandar, I., Notosiswoyo, S., & Purnandi, C. (2012). Type and Origin of Springs and Hotsprings at Surrounding Ridges of Bandung Basin, Related With its Potential Natural Contamination. Proceedings of International Symposium on Earth Science and Technology.
25. Trinovini, Iskandar, I., Notosiswoyo, S., Indriati, T., & Purnandi, C. (2012). Study of Arsenic Contents in Mountain Area of Bandung Volcanic Ridge, West Java, Indonesia. Proceedings of the 9th International Symposium on Novel Carbon Resources Sciences, Kyushu University, Japan.

2011-2010
26. Iskandar, I., Koike, K., & Sendjaja, P. (2011). Sources and Mechanism of Groundwater Sulfide Arsenic Based on Microscopy, Spectral Reflectance of Mineral and SEM Observation. Abstract and Presentation, 1st International Symposium Environmental Geoscience in Asia, Bandung.
27. Ilyas, A., Koike, K., & Iskandar, I. (2010). Geostatistical Modeling of Ore Grade Distribution in a Laterite Nickel Deposit. Proceedings of the Spring Meeting of Mineral and Material Processing of Industrial Japan (MMIJ), Tokyo.
28. Iskandar, I., & Koike, K. (2010). Identifying Arsenic Contamination Process in Groundwater in Consideration of Water-Rock Spatial Correlation. Abstract, Japan Geoscience Meeting 2010, Chiba.

2009-2006
29. Iskandar, I., Koike, K., & Widodo, L.E. (2009). Geostatistical Modeling of Arsenic Concentration in Groundwater by Considering Rock-Water Interaction in Mineralized Area. Proceedings of the International Symposium on Earth Science and Technology, Fukuoka.
30. Iskandar, I., & Koike, K. (2008). Space – Time Analysis of Arsenic Concentrations in Groundwater near a Mining Site for Transport Modelling. Proceedings of the IAHR International Groundwater Symposium, Istanbul.
31. Iskandar, I., & Koike, K. (2008). Modeling of Groundwater Pathway in a Fault Zone by Space-Time Analysis of Arsenic Concentration. Proceedings of the International Symposium on Earth Science and Technology, Fukuoka.
32. Iskandar, I., Notosiswoyo, S., Asmar, H., & Tobing, F.L. (2007). Konsep Model Reduksi Alami Konsentrasi Cr⁶⁺ dengan Aquifer-Aquitard Buatan kombinasi Sand-Silt-dan Sedimen Organik. Proceedings of Temu Profesi Tahunan Perhapi, Makassar.
33. Hutasoit, L.M., & Iskandar, I. (2007). Groundwater Pathway for Arsenic from Mining Site to Buyat Village. Proceedings of the 5th International Symposium on Earth Science and Technology, Fukuoka.
34. Hutasoit, L.M., Iskandar, I., & Ramdhan, I. (2006). Potential of Artificial Groundwater Recharge Through Surface Reservoir for Jakarta Aquifer. Proceedings of the 4th International Workshop on Earth Science and Technology, Fukuoka.
35. Hutasoit, L.M., & Iskandar, I. (2006). Potential Arsenic Source and Recharge Area in Buyat Village. Proceedings of the 9th International Symposium on Mineral Exploration, Bandung.