Gumilar Utamas Nugraha

ORCID: 0000-0003-4759-761X
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About
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Research Areas
  • Geological and Geophysical Studies
  • Geophysical and Geoelectrical Methods
  • Geophysics and Gravity Measurements
  • Geophysical Methods and Applications
  • Seismic Imaging and Inversion Techniques
  • Groundwater and Isotope Geochemistry
  • Hydrology and Watershed Management Studies
  • Computational Physics and Python Applications
  • Groundwater and Watershed Analysis
  • Synthetic Aperture Radar (SAR) Applications and Techniques
  • Geotechnical and construction materials studies
  • Data Mining and Machine Learning Applications
  • Environmental Monitoring and Data Management
  • Seismic Waves and Analysis
  • Advanced Numerical Methods in Computational Mathematics
  • Scientific Computing and Data Management
  • Cryospheric studies and observations
  • NMR spectroscopy and applications
  • Groundwater flow and contamination studies
  • Methane Hydrates and Related Phenomena
  • Water and Land Management
  • Soil Moisture and Remote Sensing
  • Hydrocarbon exploration and reservoir analysis

National Research and Innovation Agency
2022-2025

National Research, Development and Innovation Office
2025

National Nuclear Energy Agency of Indonesia
2022

Indonesian Institute of Sciences
2020-2021

Center of Research and Technologic Development in Electrochemistry
2020

Padjadjaran University
2019

<title>Abstract</title> This study integrates geoelectrical resistivity inversion, geostatistical analysis, and clustering techniques to improve subsurface characterization in Cikole, Lembang, West Bandung Regency. The primary objective is enhance resistivity-based zonation for groundwater exploration by employing a dipole-dipole array with 10-meter electrode spacing, followed 2D inversion visualize distributions. Geostatistical interpolation using Kriging effectively captures spatial...

10.21203/rs.3.rs-6174105/v1 preprint EN Research Square (Research Square) 2025-04-24

Increased anthropogenic activity in urban areas has exacerbated the vulnerability of groundwater resources. The AVI, GOD, SINTACS, and DRASTIC methods were used to analyze Pangkalpinang City. Schlumberger vertical electrical sounding was determine lithology aquifer configuration study area. There are three index city Pangkalpinang. Low levels generally found southeastern northwestern parts area, whereas high discovered northern southern Areas with low have hydraulic conductivity values on...

10.1155/2020/8887914 article EN cc-by International Journal of Geophysics 2020-12-29

Jakarta groundwater basin is one of the most developed basins in Indonesia as city located within basin, with an elevation ranging from 0 to 1000 m above sea level. The study basement characteristics still needs further Groundwater Basin. objective this examine Basin by satellite gravimetry. Gravity forward models were constructed using Oasis Montaj and 2-D GM-SYS software for two north-south sections, A B, west-east section C-D. Regional anomalies area a value range 36.7 53.2 mGal, while...

10.22146/ijg.46672 article EN Indonesian Journal of Geography 2020-04-28

Abstract Lembang groundwater basin has an area of 209 km 2 . Increased tourism activities in the Groundwater Basin require sufficient resources to support sustainability these activities. The purpose this study was analyze hydrostratigraphy recharge zone Cikole-Lembang. Electrical Resistivity Tomography (ERT) with dipole–dipole electrode array and seismic refraction used hydrostratigraphy. results ERT inversion show that Tangkubanparahu Pyroclastic Fall can be characterized as aquifers. This...

10.1007/s13201-023-02004-2 article EN cc-by Applied Water Science 2023-09-21

DOI:10.17014/ijog.8.3.359-369Continuously increasing population and progressive infrastructural development in the region of Kertajati International Airport, Indonesia, emphasize need to develop a sustainable water supply network. Airport facilities require sufficient resources, which can be obtained from surface groundwater. Groundwater exploration provide necessary information for assessing resources. The purpose this study is analyze configuration aquifers studied area. A Schlumberger...

10.17014/ijog.8.3.359-369 article EN Indonesian Journal on Geoscience 2021-08-14

Abstract The Jakarta groundwater basin is constructed by tertiary, Pleistocene and resent rock consisting of sedimentary rocks, volcanic activities alluvial. There are three very potential aquifer layers found in this i.e. shallow aquifers, upper confined lower aquifers bounded several aquitard. High economic development cause high vulnerability to polluted such as nutrients. Previous research mentioned the presence nutrients urban areas can be caused anthropogenic activity. Nutrient...

10.1088/1755-1315/789/1/012045 article EN IOP Conference Series Earth and Environmental Science 2021-06-01

The numerical method plays an important role in groundwater flow modeling to solve linear equations with sparse matrices. This study evaluates the performance of Krylov Subspace adaptive preconditioning compared classical iterative methods, such as Gauss-Seidel, Jacobi, and Successive Over-Relaxation (SOR), simulation steady-state on a 2D grid. results show that provides fastest execution time (0.0054 seconds) minimal resource usage, CPU 0.0% RAM only 0.175 MB. In contrast, classic shows...

10.55981/risetgeotam.2024.1345 article EN RISET Geologi dan Pertambangan 2024-12-31

The Jakarta Groundwater Basin is one of the groundwater basins with highest development, economic, and business activities in Indonesia. damage has become a major growing issue basin. Intensive development led to overuse this Efforts are needed manage, protect, conserve basin support economic sustainably. Jakarta, as capital city Indonesia, located sustainability determined by amount recharge those basins, so knowledge important. an important part hydrological cycle, ensures some areas. This...

10.51835/iagij.2021.1.1.12 article EN cc-by-sa Indonesian Association of Geologists Journal 2021-03-31

Abstract Kuningan district is located in the eastern part of west java province. It has uniquely geological feature. In western this dominated by volcanic products from eruption mount ciremai, while it tertiary rocks formation. Geophysical investigations have been conducted to identify subsurface phenomena i.e. Lebakwangi sub-district. The results showed that fault zone a magnetic anomaly value and bouguer anomalies are inversely proportional, higher lower value. faults tendency towards...

10.1088/1755-1315/311/1/012052 article EN IOP Conference Series Earth and Environmental Science 2019-08-01

Airtanah merupakan faktor penting bagi pembangunan ekonomi di wilayah Serang Barat dan Kota Cilegon, dimana kedua ini terletak dalam DAS Cidanau. Selain itu, imbuhan airtanah sangat dibutuhkan untuk memastikan keberlanjutan pengelolaan suatu wilayah. Penelitian bertujuan mengestimasi resapan Cidanau menggunakan metode Thornthwaite, Dingman, Dingman − Hamon Edijatno Michel. Keempat estimasi pengimbuhan tersebut kesetimbangan air yang berlandaskan model neraca air. Software ESPERE version 2...

10.14203/risetgeotam2020.v30.1118 article ID RISET Geologi dan Pertambangan 2020-12-30

The Choushui River Alluvial Fan (CRAF) is facing serious land subsidence problems. In recent years, the main areas have gradually moved inland, causing security issues for Taiwan High-Speed Rail (THSR) in Yunlin county. Although pumping groundwater along high-speed railway forbidden, problem of sinking has remained. causes can be multiple and complex. There are discussions about Chousui Fan. This study aimed to develop a hydromechanical model this basin. modeling process divided into two...

10.5194/egusphere-egu23-3033 preprint EN 2023-02-22

Natural processes like tectonic activities and soil consolidation can induce land subsidence, as human such groundwater or oil extraction, mining, construction. Among the issues stated, extraction substantially contributes to global subsidence. In long term, subsidence cause unanticipated building infrastructure damage, resulting in significant financial consequences for governments. Therefore, it is critical monitor regularly inform policy decisions control factors contributing...

10.5194/egusphere-egu23-4838 preprint EN 2023-02-22

Accurate assessment of groundwater resources relies on sufficient measurements and efficient analysis tools. The integrated technologies multidisciplinary knowledge have enhanced the understanding dynamics in systems. Taking advantage wide developments computer sciences web services, platform provides an excellent open environment for investigations. Most groundwater-relevant platforms are mainly focusing data visualization. data, such as points, polylines, polygons, pre-analysis results...

10.5194/egusphere-egu23-6813 preprint EN 2023-02-25

Lineament is one of the most important features showing subsurface elements or structural weakness such as faults. This study aims to identify lineament patterns using automatic in Citarum watershed with gravity data. Satellite data were used generate a sub-surface lineament. corrected Bouguer and terrain correction obtain complete anomaly value. Butterworth filters separate regional residual from Residual analyze generated Line module PCI Geomatica The orientations lineaments fault lines...

10.22146/ijg.52402 article EN cc-by-nc Indonesian Journal of Geography 2021-04-14

Abstract The declining quality of surface water resources leads to groundwater exploitation as a source fresh water. developing urban environment also increases the need for freshwater. Each rock in geology formation has different ability transmit groundwater. There are various ways obtain parameters hydraulic conductivity and transmissivity. commod method were time cost consuming. new estimation geohydraulic parameter needed. This paper aims estimate using techniques approaches compares...

10.1088/1755-1315/789/1/012049 article EN IOP Conference Series Earth and Environmental Science 2021-06-01
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