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Bayu A. Sadjab
Department Of Physics, Faculty Of Natural Sciences And Engineering Technology, Universitas Halmahera
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Identification of Seawater Intrusion Using Geoelectrical Method with Wenner-Schulumberger Configuration: A Case Study in Southern Tolonuo Island, North Halmahera Regency, Indonesia Kalilu, Nikodemus; Sadjab, Bayu Achil; Yusniar, Masitah; Kurnia, Kurnia; Pratiwi, Elok Surya
International Journal of Hydrological and Environmental for Sustainability Vol. 1 No. 2 (2022): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1538.127 KB) | DOI: 10.58524/ijhes.v1i2.112

Abstract

Research on seawater intrusion has been carried out on the southern Tolonuo island, Tobelo sub-district, North Halmahera Regency, Indonesia using the Wenner-Schlumberger configuration resistivity geoelectric method supported by the Naniura NRD 300 HF tool, this study aims to determine the distribution pattern of seawater intrusion and to determine the resistivity value of each subsurface rock layer in the study area. The measurement results are processed using the RES2DINV software to obtain a 2-D pseudo resistivity section that describes the distribution value of the layer that the soil surface is shown in color images. The measurement results on line 1 show that there is seawater intrusion with a resistivity value range of 0.338 m - 2.44 m which is at 4 – 20 meters with a certain pattern, line 2 also has sea water intrusion at a depth of 5 m – 20 m with a resistivity value of 1.31 Ωm – 6.50 Ωm. On line 3, it is clear that there is a good correlation between the intersection of line 1 and line 2, where there is a low resistivity contrast on the line 1 with a stretch of 35 m – 50 m at a depth of 10 m – 20 m and the line 2 with a span of 80 m - 100 m at a depth of 10 m - 20 m. The distribution pattern of seawater intrusion from the south to the north of Tolonou Village with a wide range of up to 200 meters from residential areas from the shoreline. The research area has layers of clay rock with a resistivity value between 30 – 80 Ωm, and breccia rocks around it with a resistivity value of 100 – 200 Ωm. On the other hand, between clay and breccia there is impermeable rock which is thought to be conglomerate rock with a resistivity value of 200-500 Ωm, besides that in the study area there is also a layer suspected to be a groundwater aquifer layer with a resistivity value (ρ) < 10 m.
Geoelectric Interpretation of Wenner-Schlumberger Configuration Using Res2Dinv Software: A Case Study of 2D Mapping of Seawater Intrusion in a Landslide Potential Area, North Halmahera District, Indonesia Tambanaung, Andrisal; Sadjab, Bayu Achil; Kurnia, Kurnia; Janis, Harsen Berg; Yusniar, Masitah; Buka, Oktosea; Iwamoni, Steven; Nur, Adrian Rahmat
International Journal of Hydrological and Environmental for Sustainability Vol. 3 No. 1 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i1.378

Abstract

Research has been carried out on landslides in Saluta-Pelita Village, North Galela District, North Halmahera Regency, Indonesia using the Wenner-Schlumberger method using a Geoelectric Resistivity tool - Naunira NRD 300 HF. This research aims to determine the structure of the subsurface layer in the potential landslide area of Saluta-Pelita Village. In addition, this research aims to determine the slip plane (boundary layer) of sea water intrusion in the research area. The measurement results are processed using Res2Dinv software for 2D resistivity which describes the subsurface layer shown in color. The measurement results on track 1 show a clay layer with a resistivity value of 3.1 ohm -27 ohm at a distance of 1-80 meters (blue and green), a silt layer of 44.3 ohm - 184.1 ohm at a depth of 1-20 meters (Yellow) which is a slip plane (boundary layer) of sea water intrusion with a path length of 40 meters, conglomerate 210 ohm (red) at a depth of more than 7.50 meters. In track 2 there is a layer of clay with a resistivity of 1.4 ohm - 39 ohm at a depth of 1-24 meters (blue and green), silt 43.1 m-185.6 m (yellow) is the slip plane (layer boundary) of sea water intrusion with a 95 meter long track, a conglomerate layer with a resistivity of 203.4 ohm - 407.8 ohm (red) at a depth of more than 12.8 meters. On track 3 there is a layer of clay with a resistivity of 0.186 ohm - 31.4 ohm (blue and green) at a depth of up to 24 meters with a length of more than 120 meters, silt with a resistivity value of 44.4 ohm - 189 ohm (yellow) which is a slip plane (boundary layer) sea water intrusion with a path of 65 meters at a depth of 2.50 meters-24.9 meters.
Investigation of the distribution and Fe content of iron sand at Wari Ino beach Tobelo using resistivity method with werner-schlumberger configuration Sadjab, Bayu Achil; Indrayana, I Putu Tedy; Iwamony, Steven; Umam, Rofiqul
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 9 No 1 (2020): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v9i1.5394

Abstract

This research aimed to investigate the distribution, volume, and concentration of iron sand at Wari Ino Beach Tobelo. The resistivity method with Werner-Schlumberger configuration was applied to investigate the iron sand distribution. The measurements were set-up on 3 lines that run parallel along the coast of Wari Ino Village. The length of each trajectory was 150 meters with a spacing of 10 meters for each electrode. Data acquisition was carried out by using geoelectric instruments to obtain current injection (I) and voltage (V). The analysis was carried out by using RES2DINV and ROCKWORK software to obtain 2-D and 3-D cross-section models for interpreting the distribution and volume of the iron sand. The analysis and interpretation were supported by geological data of the location. Furthermore, the Fe content was characterized by using X-Ray Fluorescence Spectroscopy (XRF). There results show that the volume of the iron sand in each trajectory was 109,355 m3; 180,254 m3; and 120,556 m3. The total volume of iron sand along the three trajectories was up to 405,335 m3. The Fe content in the form of a free element is 67.41%, 57.12%, and 73.40%. The Fe content in the form of hematite mineral (Fe2O3) was 57.92%, 45.82%, and 65.47%.
Identifikasi Sebaran Dan Volume Pasir Besi Menggunakan Metode Geolistrik Konfigurasi Wenner-Schulumberger Dan Analisis Kandungan Fe Didalamnya Menggunakan X-Ray Fluorescence Di Desa Paca Bagian Selatan Papuling, Eminia Sofya; Sadjab, Bayu Achil; Kurnia, Kurnia; Buka, Oktosea; Janis, Harsen Berg; Yusniar, Masitah; Nur, Adrian Rahmat; Anwar, Haerul
Physikos: Journal of Physics and Physics Education Vol 2 No 2 (2023): Physikos: Journal of Physics and Physics Education
Publisher : Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/physikos.2.2.11723

Abstract

This research uses the Naniura NRD300 HF tool to apply the Wenner-Schlumberger configuration geoelectric method which aims to determine the direction of distribution of iron sand, the volume of iron sand, and the Fe2O3 concentration of iron sand in the southern Paca beach area. The collected measurement results are then processed by RES2DINV software into a 2 Dimensional (2D) cross section which shows the distribution value of the subsurface layer as shown by a color image. After being saved in (.xyz) format, the RES2DINV software results are processed in RockWork software to create a pseudo-3D cross section. The RES2DINV software results show a resistivity value between 0,0761 – 3,59 Ωm which is identified as iron sand with a volume of 13,304 m3 at a depth of 2,50 – 9 meters from the surface of the datum point, while on track 2, the resistivity value ranges between 0,414 – 3,13 Ωm, and at a depth of 2,50 – 7 meters from the surface of the datum point with a volume reaching 12,883 m3 based on the results of the RockWork software. The distribution of iron sand deposits in the study area is from south to north. The method used to determine the composition of minerals present in a sample is called X-ray fluorescence (XRF). The results of the analysis of the Fe2O3 content in the first pass were 36,704% and in pass 2 it was 35,500%.
Evaluating surface water and groundwater quality parameters in the Karst Mining Zone, Gunungkidul for environmental risk mitigation Yudhistira Zein Sanadha; Haerul Anwar; Faisal M. Jasin; Bayu Achil Sadjab
Journal of Natural Sciences and Mathematics Research Vol. 11 No. 2 (2025): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.v11i2.27773

Abstract

This study aims to characterize the physical, chemical, and microbiological water parameters of the Oya River (Bleberan Playen) and groundwater in the CV Kusuma Arga monitoring well, located in the white stone mining zone, Ponjong District, Gunungkidul Regency, Special Region of Yogyakarta, Indonesia. The importance of this research is driven by the lack of comprehensive water quality data in active karst mining areas and the potential environmental and health risks associated with contamination. Parameters tested included temperature, electrical conductivity (EC), total dissolved solids (TDS), turbidity, pH, nitrite, ammonia, chloride, sulfate, detergents, dissolved iron, dissolved lead, dissolved copper, dissolved cadmium, dissolved manganese, dissolved nickel, total coliform, and fecal coliform. Testing methods referred to the Indonesian National Standard (SNI) and Standard Methods, including the use of atomic absorption spectrophotometry (AAS) for heavy metal analysis and the membrane filter method for microbiology. The test results showed that most physical and chemical water parameters from both sources met the relevant quality standards. For example, the well water temperature of 27°C and well water pH of 6.9 were both declared to be by standards. However, analysis showed lead concentrations (0.1 mg/l in the river) and cadmium (0.010 mg/l in the river) exceeding World Health Organization (WHO) recommendations for drinking water, although initially categorized as "appropriate". Furthermore, total coliform (3000-5000 MPN/100ml) and fecal coliform (4000-4500 MPN/100ml) concentrations in both samples were very high, clearly indicating a health-risking fecal contamination, despite also being declared "appropriate" in the report. The role of Environmental Engineering science is crucial in sample collection, laboratory analysis, and interpretation of this data. This study contributes to the understanding of water quality in areas affected by mining activities and emphasizes the need for further evaluation for sustainable environmental management.
Co-Authors ., As'ari Adey Tanauma Adrian Rahmat Nur B R Toisutta B.R. Toisuta Boyke Toisuta Buka, Oktosea Dalengkade, Mario Nikolaus Dwi Rahayu Pujiastuti Endah Kinarya Palupi Faisal M. Jasin Haerul Anwar Haerul Anwar Hanny F. Sangian Hariyono Seputro Youngky Pratama Harsen Berg Janis I Putu Tedy Indrayana Iwamoni, Steven Iwamony, Steven Janis, Harsen Berg Kalilu, Nikodemus Khafidh Nur Aziz Kurnia Kurnia KURNIA KURNIA, KURNIA Kusnul Prianto, Kusnul Nining Purwaningsih Novita Kundiman Nur, Adrian Rahmat O.F.W. Tutupary Ontje Fransisca Winesty Tutupary Papuling, Eminia Sofya Pratiwi, Elok Surya R. Kondolembang Rofiqul Umam Ronald Kondolembang Sastrawan, Febrian Dedi Sismanto Sismanto Steven Iwamony Sunarno Sunarno Tambanaung, Andrisal Tjinta, Yumarti G B Yudhistira Zein Sanadha Yusniar, Masitah