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Journal : Jurnal Ilmu Dasar

The Determination of Bedrock Depth Using Seismic Refraction Method in Kemuning Lor Village, Sub District of Arjasa, Jember Nurul Priyantari; Agus Supriyanto
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

A research has been done using seismic refraction method to determine the depth of bedrock in the Village of Kemuning Lor, sub district of Arjasa, Jember. The Data acquisition was done by using 12 geophones and using weight drop vibrations sources. The distance between the vibration source and the first geophone is 10 meters away, while the distance among geophones is 2 meter away each. This Data acquisitions used two tracks (the first track was about 90 meters and the second track was about 40 meters). The first and second track were crossing each other, the first track lied from the main road to crevasse, while the second track lied in line with the crevasse. The result was that we were able to obtain three layers having the depth of 3,03-6,76 m; 4,37-9,93 m and 10,68-13,32 m, and having spreading speed 168,9-198,8 m; 425,1-511,7 m and 909,1-972,2 m. The obtained bedrock profile had declivity toward the crevasse and is assumed to have the potential of soil movement.
Determination of Subsurface Structure of Landslide Area According to Interpretation of Resistivity Data Supeno Supeno; Nurul Priyantari; Gusfan Halik
Jurnal ILMU DASAR Vol 9 No 1 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Resistivity method is a useful geophysical tool for investigating landslides. It can be used to estimate the subsurface structure of a landslide mass, the depth of the failure surface, and the lateral extent of a landslide. High resolution of resistivity data were obtained by applying Schlumberger configuration, while penetrating deepness was obtained by applying Vertical Electrical Sounding (VES) configuration. Interpretation of subsurface condition showed there was soil layer in survey area which was indicated as slip surface triggering the landslide.
Identification of Aquifer in the MIPA Faculty - University of Jember Using 1D Geoelectrical Resistivity Method with Schlumberger Array Buwana, Bayu; Priyantari, Nurul; Supriyadi, Supriyadi
Jurnal ILMU DASAR Vol 21 No 2 (2020)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v21i2.13159

Abstract

Faculty of Mathematics and Natural Sciences University of Jember located in Sumbersari District with lithological conditions in the form of volcanic rocks, lithosol soils, and regosol soils that are capable of absorbing water and potentially as aquifers. In point of fact, in the campus zona of the University of Jember including in the Faculty of Mathematics and Natural Sciences, there is always a shortage of freshwater for various academic and non-academic activities. Therefore, research needs to be conducted to assess the lithology of subsurface structures in the FMIPA zone so that the depth of groundwater layers and aquifer layers can be determined. The study was conducted using the Schlumberger array geoelectric resistivity method at 5 VES points. The results obtained in the form of resistivity log curves can be seen that at the five points VES has lithology in the form of clay, gravel, sandstone, and groundwater layer. Each VES point was identified the groundwater layer and some of them were identified as aquifers. The aquifer with the greatest thickness is found at point VES 2, which is to the west of the Baitul Ilmi Mosque, so it is recommended as the location of a new well.Keywords: lithology, aquifers, geoelectric resistivity method, groundwater.