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All Journal Jurnal Teori dan Aplikasi Fisika Jurnal Ilmiah Geologi pangea
Intan Paramita Haty
Jurusan Teknik Geologi, Universitas Pembangunan Nasional Veteran Yogyakarta
Astronomy Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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Studi Hidrogeokimia Air Tanah di Daerah Kebumen Bagian Barat, Indonesia Setia Pambudi; Budi Sulistijo; Dwi Fitri Yudiantoro; Intan Paramita Haty
Jurnal Ilmiah Geologi PANGEA Vol 9, No 1sp (2022): Jurnal Ilmiah Geologi PANGEA Edisi Spesial
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v9i1sp.9411

Abstract

Abstrak - Studi penilaian hidrogeokimia air tanah telah dilakukan di Kebumen bagian barat yang dicirikan dengan fitur karstnya berdasarkan parameter fisikokimia (pH, konduktivitas elektrik, zat padat terlarut, kesadahan, Ca2+, Mg2+, Fe3+, Mn2+, K+, Na+, Li+, and NH4+, HCO3-, Cl-, SO42-, NO2-, and NO3-). Data sampel air diambil dari 25 sumber air tanah dangkal berupa mata air, goa basah dan sumur. Data fisikokimianya mengindikasikan hanya ada kontaminasi alami maupun dari manusia yang sangat rendah. Dari diagram Piper ditunjukkan bahwa fasies air tanah yang berada di daerah ini adalah kalsium-magnesium bikarbonat yang mengindikasikan efek litologi karbonatan yang sangat kuat ke air tanah. Diagram Durov menunjukkan bahwa air tanah di daerah studi hanya mengalami pertukaran ion yang sangat rendah yang mengindikasikan kemurnian air tanah ini dari dampak kontaminasi alami maupun dampak antropogenik.Kata kunci: hidrogeokimia, air tanah, karst, Kebumen Abstract - A groundwater hydrogeochemistry assessment study has been conducted in western Kebumen, characterized by its karstic features based on physicochemical parameters (pH, electric conductivity, total dissolved solids, hardness, Ca2+, Mg2+, Fe3+, Mn2+, K+, Na+, Li+, and NH4+, HCO3-, Cl-, SO42-, NO2-, and NO3-). Water samples were taken from 25 shallow groundwater sources such as springs, wet caves, and wells. The physicochemical data indicates very low natural and/or human contamination. The Piper diagram shows that the groundwater facies in this area is calcium-magnesium bicarbonate, indicating a very strong effect of carbonate lithology on groundwater. The Durov diagram shows that the groundwater in the study area only undergoes very low ion exchange, indicating the purity of this groundwater from natural contamination or anthropogenic impacts.Keywords: hydrogeochemistry, groundwater, karst, Kebumen
Studi Seismik Tomografi Waktu Tempuh Untuk Identifikasi Zona Lemah dengan Menggunakan Konsep Ray Tracing Berdasarkan Algoritma Dijkstra Wiji Raharjo; Indriati Retno Palupi; Intan Paramita Haty
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v10i2.307

Abstract

Tomography is a popular method in describing the subsurface based on P and S waves parameter of the seismic wave. It can show the low velocity zone or the weak zone that usually associated with the structure or fluid evidence. However, it needs some informations about the hypocenter and stations location, and the initial velocity model as the geological model. Based on the information, then ray path on each grid/block in the research area is calculated along from the hypocenter to the each station. Ray path concept is based on the Snell Law, Fermat and Hyugens principle where the wave will be dispersioned when it faces to the different medium and it will choose the medium with the fastest travel time. Then by the inversion process, the tomogram can be resulted. Dijkstra Algorithm is choosen as the basic mathematical equation for the ray path calculation because it is easy and use in some digital platform. This algorithm is provened can result the good tomogram where it can be showed the structure of the geological model.
Co-Authors Budi Sulistijo Dwi Fitri Yudiantoro Indriati Retno Palupi Setia Pambudi Wiji Raharjo