Fauzan, Ahmad (2015) PENENTUAN PENYEBARAN AKUIFER AIR TANAH DENGAN METODE GEOLISTRIK SCHLUMBERGER DAERAH KABUPATEN BREBES, PROVINSI JAWA TENGAH. Other thesis, UPN ''VETERAN'' YOGYAKARTA.
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Abstract
Penelitian Pendugaan Penyebaran Akuifer Air Tanah dengan Metode Geolistrik
Schlumberger daerah Kabupaten Brebes bertujuan mengidentifikasi kedalaman
dan ketebalan akuifer (airtanah) berdasarkan penampang data nilai resistivitas
sounding serta penyebaran akuifer (airtanah) berdasarkan pemodelan 3D
resistivitas bawah permukaan.
Data penelitian merupakan data sekunder hasil proses Akusisi menggunakan
metode geolistrik dengan konfigurasi schlumberger. Jumlah data 37 titik, spasi
antar titik sekitar 2 km, luas area pengukuran 161,12 km2. Data pengukuran
berupa beda potensial (ΔV), arus (I), resistivitas (Rho), dan faktor geometri (K).
Pengolahan data dilakukan dengan korelasi semua titik pengukuran menjadi 3D
Solid Model.
Hasil interpretasi geolistrik berdasarkan penyebaran pola resistivitas geolistrik
menunjukkan keberadaan suatu akuifer dengan nilai resistivitas sekitar 10-30
ohm.m yang diidentifikasi sebagai Akuifer Batupasir. Memiliki 2 akuifer dengan
ketebalan Akuifer Dangkal 10-15 meter serta kedalaman mulai dari 5-10 meter
dan Akuifer Dalam 65-100 meter serta kedalaman lebih dari 10 meter. Pola
Distribusi akuifer (airtanah) berdasarkan data isoresistivity solid model 3D
(kesamaan nilai resistivitas) untuk batupasir menunjukan pola kemenerusan yang
bervariasi berdasarkan kedalaman. Penyebaran Akuifer Dangkal berupa pola
setempat namun untuk Akuifer Dalam cenderung kebagian tenggara daerah
penelitian. Terdapat pengaruh intrusi air laut pada kedalaman 15-40 meter dengan
ketebalan sekitar 10-40 meter.
Kata kunci : geolistrik sounding, schlumberger, akuifer (air tanah), resistivitas
Research upon freshwater aquifer distribution in Brebes District had been
carried in order to identify aquifer's thickness and depth based on sounding
resistivity section and using three-dimensional subsurface resistivity modeling to
determine its distribution.
Research data were secondary result from acquisition, utilizing
schlumberger configuration with 37 nodes, with 2km node spacings, and 161.12
square kilometres of acquisition area. Measurement data were potential
difference, current, resistivity, and geometry factor. Data processing were done
using all-nodes corelation to create a three-dimensional solid model.
Geoelectrical interpretation based upon resistivity distributional pattern
indicates a present of freshwater aquifer with resistivity value ranging from 10-
30ohm.m, identified as Sandstone Aquifers. These aquifers were categorized into
shallow and deep. The shallow ones are 5-10 meter deep with 10-15 meter
thickness, whereas the latter were below 10 meter deep with 65-100 meter
thickness. Distributional pattern for these aquifer based on three dimensional
isoresistivity solid model for sandstone indicated various continuity pattern
towards their depth. Shallow aquifer distributions were local, but the deep ones
are southeast oriented. There were saltwater intrusion in 15-40 meters depth with
thickness from 10-40 meters.
keywords: geoelectric sounding schlumberger, aquifer (groundwater), resistivity
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Geography |
| Depositing User: | Erny Azyanti |
| Date Deposited: | 20 May 2016 06:02 |
| Last Modified: | 20 May 2016 06:02 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/1933 |
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