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INDONESIA
Journal of Geosciences and Applied Geology
Published by Universitas Padjadjaran
ISSN : 25793136     EISSN : 25793136     DOI : https://doi.org/10.24198/gsag.v7i3
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
Journal of Geological Sciences and Applied Geology (GSAG) is a National multidisiplinary Journal focus on Geological Sciences, Applied Geology, and Geological Engineering and Earth Science. Our Mission is to publish research related to (but not limited) Geology Petrology Paleontology Stratigraphy Sedimentology Remote Sensing Geomorphology GIS Engineering Geology Geotechnics Geochemistry Geophysics Geological Hazard and Disaster Geopark Hazard Mitigation Geography Earth Sciences
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 4 Documents
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Search results for , issue "Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology" : 4 Documents clear
Soil and Groundwater Contamination Based on Geological and Hydrogeological Investigation MOCHAMAD NURSIYAM BARKAH; mohamad sapari dwi hadian; Bombom Rahmat Suganda; Teuku Yan Waliyana Muda Iskandarsyah; Gisca Gia Frini; Nor Farina Nadzif
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13447

Abstract

Water and environment are different things but they have a close relation each other. One of area in Indonesia Site ‘X’ (confidential site) has rapid development and many industries have built up their business here. The main issue is about the condition of soil and groundwater in this area are become contaminated in their waste disposal which is near with the resident area. Purposed of the study is to know how deep and extent the level of contamination in soil and groundwater. The investigations are using soil assessment, monitoring well installation, and aquifer testing. The soil assessment is using standard traditional drilling such as split spoon for subsurface drilling and sampling. Split spoon logging technique is more detail and provide good sampling for vertical or angle soil boring. Angle soil boring was done to know the detail soil sampling data near the resident area. Based on geological data, there are twelve soils boring (ten soils boring and two monitoring wells). The soil investigation observed as very fine grained to depths the recorded water table with coarser fine grained soil as depth. The indication of pure solvent was observed in three central location soil boring based on soil sampling. The PID (Photo-Ionization Detector) reading indicate that the soil sampling >1,000 ppm and with evident of solvent/hydrocarbon odour was indicating as impacted samples.  Based on hydrogeology data, there are eleven monitoring wells (two the newest MW and nine the existing MW). This research area has shallow aquifer system at depths 8.0-10.0 meter below groundwater surface as an unconfined aquifer layer. The monitoring well installation was observed five impacted monitoring wells. From one to five well, there is one well can looks clearly the sheen and has strong solvent based on laboratory in one monitoring well.Based on the data analysis, discovered that the research area was impacted. The collected data bring us to the next step that the research area should be remediated to make our environment clean or decreasing the level of contamination concentrate. Additionally, soil and groundwater contaminant levels have likely eliminated the previous remedial alternative suggestion of slow release oxygen and along with the soil geological conditions and severely reducing groundwater conditions, will make all remedial efforts challenging.
Fulfillment Of Water Needs With Rainwater Harvesting Concept at Campus Universitas Padjadjaran, Jatinangor, West Java BOMBOM RACHMAT SUGANDA; Mochamad Nursiyam Barkah; Teuku Yan Waliyana Muda Iskandarsyah; Nanda Natasia; Mohamad Sapari Dwi Hadian
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13449

Abstract

University of Padjadjaran (Unpad) as a means of education and research has need of water large quantity. Until now meeting the needs of water was carried out as a conventional namely the usage of groundwater. Through the passing of time, the constant use of groundwater and land use change in the catchment area may pose a risk of ground water crisis. Rainwater in the university environment has large potential with an average annual rainfall is 961.92 mm. The concept of rainwater harvesting by using potential water which be runoff will become the source of water to the fulfillment of a need. Unfortunately, rainwater that become runoff can contain bacteria and chemical contents that may be harmful to health. It is necessary for the screening process using filtration and membrane technology that can clean water and produce safe water to drink.
Combining geological surface data and geostatistical model for Enhanced Subsurface geological model Muhammad Kurniawan Alfadli; Nanda Natasia; Iyan Haryanto
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13451

Abstract

AbstractThis paper emphasis the use of geological information gathered from surface mapping and subsurface data, the method that used was mainly utilizing statistical information and deterministic model interpreted. Comparison model was built to calculate the deviation between realization, the calculation was furthered can be used as a uncertainty to make a better decision to choose the best realization. Geostatistics is a branch of statistics focusing on spatial or spatiotemporal datasets. In geology, geostatistical is used for numerical calculation of subsurface approach with several data such as geophysical or geological observation. Geostatistics modelling have several parameters setup to obtain best approach model. The parameters namely lithological boundary, geological structure and random seed number. Process for modelling used 23 drilling data with various lithological type. Two type geostatistical method is applied for the data that is Indicator Kriging (IK) and Sequential Indicator Simulation (SIS) with grid size 1000x1000 and 2000x1500. Distribution of lithology begin without parameters. Resulted shown that the model not appropriate with geological surface data and mismatch lithology position. To obtained better model, several geological information is included before geostatistical calculation. From regional geology surface data is obtained geological formation within lithological information. Then, geological structure describes the geology fault and formation boundary.Keywords: Geostatistics, subsurface, enhanced model, variance, random seed number
Linking Petrography And Petrophysical Analysis In Carbonate Reservoir Characterization: Case Study In Baturaja Formation Offshore Northwest Java Nanda Natasia; Muhammad Kurniawan Alfadli; Kurnia Arfiansyah; Adi Hardiyono; Mohamad Nursiyam Barkah; Iyan Haryanto
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13448

Abstract

AbstractLinking geological analysis with petrophysical characterization in complex carbonate reservoir is a chalangging task. Many previous researcher has proofed that depositional facies in carbonate reservoir has very little advantages in reservoir quality due to overprinted with diagenetic facies. The difficulties in characterized the carbonate may rise because one does not include some genetic, geometrical and petrophysical character of the pore space, both geometry and distribution. The aim of this study is to evaluate the reservoir rock typing in carbonate reservoir by comparing rock-fabric descriptions analyzed in thin section with laboratory measurements of porosity, permeability, capillarity, and Archie m values. Methodology employed for this study involved the examination of thin sections and the integration of routine analysis data following lucia’s pore classification scheme. The first step in characterized the petrophysical class is the determination of interparticle porosity by substracting the separate vug porosity from total porosity. The separate vug porosity is estimated in petrographic analysis in 325 thin section samples. Than estimating the value for un cored interval by determining the relationships between total porosity, separate vug porosity and sonic interval transit time. The petrographic analysis to estimating the separate vug porosity is a qualitative way, and so the value is not quantitative, but the trend is still implies the value so the relationships between porosity and sonic log can be quantified. Calibration of pore types to acoustic log response is accomplished by making a detailed log of porosity types described from thin sections and constructing Z-plots of total porosity and transit time from logs and separate-vug porosity from thin sections . The “m” value (lithology exponent or cementation factor) is different from the other terms in the Archie equation in that it is related to rock fabrics, specifically to vuggy porosity. Reservoir characterization by using this scheme has proofed that geological analysis made in detailed thin section can be a helpfull tool since the validation in tested and produced interval shows a verry good relationships. Keywords : Reservoir Characterization, Baturaja Fm., Carbonate, Petrophysics.

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