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All Journal Bulletin of Scientific Contribution : Geology Journal of Geoscience, Engineering, Environment, and Technology
Muda Iskandarsyah, Teuku Yan Waliana
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Physics

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KARAKTERISTIK AIR TANAH PADA AKIFER VULKANIK DI LERENG TENGGARA GUNUNG PULOSARI, PANDEGLANG, PROVINSI BANTEN Listiawan, Yudhi; Hadian, Mohamad Sapari Dwi; Muda Iskandarsyah, Teuku Yan Waliana; Muhammad, Azwar Satrya; Barkah, Mochamad Nursiyam
Bulletin of Scientific Contribution Vol 18, No 1 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (532.671 KB) | DOI: 10.24198/bsc.v18i1.27090

Abstract

Gunung Pulosari merupakan Gunung Api strato yang terletak di daerah Pandeglang Provinsi Banten. Daerah penelitian disusun oleh batuan vulkanik yang memiliki potensi air tanah yang besar. Masih sedikitnya ekploitasi air tanah, membuat daerah di sekitar Gunung Pulosari ini menarik untuk diteliti kondisi hidrogeologinya.Tujuan dari penelitian ini adalah menentukan karakteristik air tanah berdasarkan sifat fisik dan kimia air tanah serta kaitannya dengan kondisi geologi yang berkembang di daerah penelitian dengan melakukan pemetaan hidrogeologi. Dari hasil pemetaan hidrogeologi dan didapatkan sebanyak 13 lokasi pengamatan yang terdiri 10 mata air dan 3 sumur gali. Sifat fisik air menunjukan karakteristik yang homogen, nilai Daya Hantar Listrik (DHL) 60 sampai 190 μS/cm, Zat Padat Terlarut (ZPT) dari 20 sampai 90 mg/L, pH dari 4,7 sampai 8,2 dan suhu air dari 25 sampai 26,9 oC.  Sebanyak 5 sampel dilakukan uji kimia air tanah untuk di analisis fasies kimia air dengan diagram triliniear Piper.Dari hasil penelitian didapatkan fasies kimia air tanah di daerah penelitian didominasi oleh Ca:HCO3 dan satu lokasi (P-3) Ca.Na:HCO3. Hal ini mengindikasikan bahwa air tanah masih dipengaruhi oleh kondisi permukaan dan sistem alirannya masih bersifat lokal.
Characteristics of Groundwater Hydrochemistry and Stable Isotopes (δ18O & δ2H) in Cadasari, Banten, Indonesia Hidayat, Hadi; Yoseph, Boy; Muda Iskandarsyah, Teuku Yan Waliana
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 02 (2025): JGEET Vol 10 No 02 : June (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.02.21531

Abstract

Groundwater is an essential resource for drinking and domestic use, displaying significant diversity in volcanic regions.This study focuses on Cadasari, Banten, Indonesia, and aims to determine the hydrochemical characteristics of groundwater and the stable isotopes (δ18O & δ2H). Hydrogeological mapping was employed, and analytical data were collected from 20 groundwater sources, including springs, rivers, and wells, at elevations ranging from 167 to 928 meters above sea level. The hydrochemical analysis revealed various groundwater types, such as Ca-HCO3, Ca+Mg-HCO3, Na+K+Ca-HCO3, and Na+K+Ca-Cl. These variations in groundwater types are attributed to differences in volcanic lithofacies. Gibbs and Gaillardet’s diagrams indicate that water-rock interaction processes primarily influence the variability of these groundwater facies in Cadasari, highlighting the significant role of silicate minerals in the groundwater's geochemistry. The isotopic composition of borehole samples shows an average isotope ratio of -7.0 ‰ for δ18O and -41.7 ‰ for δ2H, while dug well samples have average ratios of -6.1 ‰ for δ18O and -34.9 ‰ for δ2H. Spring samples exhibit an average isotope ratio of -6.7 ‰ for δ18O and -39.3 ‰ for δ2H. The isotopic composition across the groundwater samples suggests that the water in this area is of meteoric origin.
Co-Authors Boy Yoseph Cahya Sunan Sakti Syah Alam Hadi Hidayat Mochamad Nursiyam Barkah Mohamad Sapari Hadian Muhammad, Azwar Satrya Yudhi Listiawan