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All Journal International Journal of Advances in Applied Sciences dCartesian: Jurnal Matematika dan Aplikasi Jurnal MIPA PHARMACON JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Jurnal Penelitian Pendidikan IPA (JPPIPA) The Studies of Social Sciences
Bobanto, Maria D.
Sam Ratulangi University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences

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Simulasi Efek Konduktivitas Hidrolik pada Intrusi Air Laut Ferdy; Wungkana, Tirza; Pandara, Dolfie Paulus; Bobanto, Maria D.; Sangian, Hanny F.; Tanauma, Adey; Tongkukut, Seni H.; Kolibu, Hesky S.
Jurnal Penelitian Pendidikan IPA Vol 11 No 4 (2025): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i4.5437

Abstract

This research has been conducted with the aim of simulating the process of seawater intrusion using SEAWAT software and assessing the factors causing seawater intrusion. In this simulation, variations in hydraulic conductivity and aquifer material types are explored to understand their impact on the distribution of water levels. The simulation results are presented in the form of simulated concentration plots used to visualize concentration distribution with color gradients reflecting changes in concentration values. Additionally, the direction of groundwater flow is represented by arrows, aiding in understanding the movement patterns of dissolved substances within the aquifer. Simulated head plots are created using colors and contour lines. The resulting simulated head plots depict changes in color and contour lines that represent variations in water levels throughout the aquifer. Color gradients from yellow to purple indicate a decrease in water levels, while contour lines indicate the direction of groundwater flow. Furthermore, changes in the shape of contour lines from straight to curved depict changes in the topography or hydrogeological characteristics within the aquifer. The simulations are carried out by considering changes in hydraulic conductivity and aquifer material characteristics. In the context of this research, hydraulic conductivity is considered a key factor influencing the movement of dissolved substances within the aquifer, and through this analysis, it is found that hydraulic conductivity significantly affects water level distribution and groundwater flow patterns.  
Characterization of Seawater Intrusion into Groundwater Aquifers Using the Electrical Resistivity Method in the Coastal Area of Tateli, North Sulawesi Ferdy, Ferdy; Pandara, Dolfie Paulus; Bobanto, Maria Daurina; Mambu, Brian Benyamin
Jurnal Penelitian Pendidikan IPA Vol 11 No 10 (2025): October: In Progress
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i10.12303

Abstract

This study aims to characterize the potential seawater intrusion in the aquifers of the coastal area of Tateli Beach, Manado. A geoelectrical resistivity survey was conducted using a dipole–dipole configuration with 48 potential electrodes spaced 10 m apart. The data were processed using RES2DINV software to generate two-dimensional resistivity sections. The resistivity values were correlated with groundwater quality data from nearby wells, particularly salinity and electrical conductivity. The modeling results revealed a low-resistivity zone (≤10 ohm·m), interpreted as a water-saturated aquifer down to a depth of approximately 20 m, overlain by a high-resistivity layer (≥5,000 ohm·m) acting as an aquifuge. Groundwater samples indicated salinity values of 0.01–0.02% and electrical conductivity ranging from 208 to 483 µS/cm, which are still classified as freshwater. In addition, a deeper aquifer was identified at around 50 m depth. These findings suggest that no significant seawater intrusion is currently present. The integration of resistivity imaging and groundwater quality analysis supports the conclusion that the aquifers remain preserved, although continuous monitoring is required to detect potential changes due to human activities and climate impacts.
Co-Authors Adey Tanauma Angmalisang, Ping Astony As’ari, As’ari Bakti, Andi Ikthiar Ferdy Ferdy . Gerald Tamuntuan Guntur Pasau Handy I. R. Mosey Hanny F. Sangian Hesky S. Kolibu Hesky Stevy Kolibu Laoh, Marco Mailoor, Michelle Jenneth Mambu, Brian Benyamin Mananohas, Maharani Alamanda Mandey, Fleydi Novisnky Manginsabara, Ivone S Maureen Kumaunang Muhammad Irham Paendong, Meiga Pandara, Dolfie Paulus Ponumbol, Yuki Saefuloh, A. Seni Herlina J. Tongkukut Tampemawas, D.D Tongkukut, Seni H. Unso, Kristina Verna A. Suoth Viola, Thevita Vistarani Arini Tiwow Wungkana, Tirza