IDENTIFIKASI PERSEBARAN AKUIFER AIRTANAH MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DAN DIPOLE – DIPOLE SERTA DATA NERACA AIR DI DAERAH “X”

OKTAVIANI, UNIK NUR (2022) IDENTIFIKASI PERSEBARAN AKUIFER AIRTANAH MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DAN DIPOLE – DIPOLE SERTA DATA NERACA AIR DI DAERAH “X”. Other thesis, UPN 'Veteran" Yogyakarta.

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Abstract

INTISARI
IDENTIFIKASI PERSEBARAN AKUIFER AIRTANAH MENGGUNAKAN
METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DAN DIPOLE
– DIPOLE SERTA DATA NERACA AIR DI DAERAH “X”
Oleh:
Unik Nur Oktaviani
115180017
Penelitian ini berada di daerah ‘X’ yang secara astronomi berada pada 110°23’ –
110°46’30” BT dan 7°14’ – 7 °32’35” LS. Meningkatnya sumber daya manusia di muka bumi
ini membuat kebutuhan air semakin meningkat, maka dari itu perlu dilakukan eksplorasi
airtanah guna memenuhi kebetuhan air di daerah setempat. Akuifer merupakan lapisan di
bawah permukaan tanah yang mengandung air dan memiliki ruang antar butir sehingga dapat
menampung dan mengalirkannya. Pada penelitian ini menggunakan metode geolistrik,
konfigurasi Schlumberger dengan 10 titik pengukuran dan konfigurasi Dipole – dipole dengan
5 lintasan.
Pengolahan data konfigurasi Schlumberger dilakukan dengan menggunakan software
IP2WIN yang akan mendapatkan curve matching, kemudian membuat profil 1D dengan
menggunakan strater. Sedangkan konfigurasi Dipole – dipole diolah menggunakan software
RES2DINV sehingga menghasilkan penampang 2D. Hasil dari profil 1D dan penampang 2D
dapat dilakukan analisa dan interpretasi megenai litologi dan keberadaan akuifer airtanah.
Peneliti juga melakukan korelasi baik secara vertical maupun horizontal dan membuat
pemodelan 3D akuifer airtanah serta menggunakan data tambahan berupa neraca air guna
mengetahui kondisi surplus dan defisit di daerah penelitian.
Berdasarkan hasil analisa dan interpretasi yang telah dilakukan, lapisan akuifer airtanah
berada pada litologi batupasir yang memiliki nilai resistivitas sekitar 20 Ωm – 50 Ωm.
Berdasarkan kedalaman, akuifer airtanah dibagi menjadi 2, yaitu akuifer airtanah dangkal yang
berada pada kedalaman sekitar 5 – 40 m dengan ketebalan 4 – 21 m dan akuifer airtanah dalam
pada kedalaman sekitar 70 – 130 m dengan ketebalan 20 m – 50 m. Peneliti juga melakukan
korelasi 1D dengan 2D dimana menujukan akuifer menyebar hampir diseluruh lintasan. Peta
persebaran secara 3D menujukan bahwa akuifer airtanah dangkal semakin menipis kearah
timur dan akuifer airtanah dalam semakin menebal kearah timur. Rekomendasi sumur gali
berada pada titik VES 2, VES 3, VES 10, dan VES 1, sedangkan rekomendasi sumur bor berada
pada akuifer airtanah dalam pada titik VES 1, VES 7, VES 8, dan VES 9. Kondisi neraca air
menandakan bahwa daerah penelitian mengalami surplus sepanjang tahun 2017, 2020, dan
2021 dengan nilai CH lebih besar daripada ETP.
Kata kunci: Akuifer, Geolistrik, Dipole – Dipole, Neraca air, Schlumberger.
ABSTRACT
IDENTIFICATION OF THE DISTRIBUTION OF GROUNDWATER
AQUIFERS USING THE SCHLUMBERGER DAN DIPOLE – DIPOLE
CONFIGURATIONS METHOD AND WATER BALANCE AT THE ‘X’
AREA
By:
Unik Nur Oktaviani
115180017
This research is located in region 'X' which is astronomically located at 110°23' –
110°46'30” east longitude and 7°14' – 7°32'35” south latitude. As the increase of human
resources, global water demand has been increasing either. The dependence on clean water,
which is not always available, makes the researcher look for alternatives. Groundwater
exploration has been carried out to meet the water needs of the local area. An aquifer is a layer
below the soil surface that contains water and has space between grains which can
accommodate and drain it. This study uses the geoelectrical method which are the
Schlumberger configuration with 10 measurements and Dipole – dipole configurations with 5
paths.
The Schlumberger configuration data processing is carried out using IP2 WIN software
which can create matching curves and a 1D profile using a starter. Meanwhile, the Dipole –
dipole configuration data is processed using RES2DINV software to produce a 2D cross�section. The results of the 1D profile and 2D cross-section can be analyzed and interpreted
regarding lithology and the presence of groundwater aquifers. Researchers also correlated
both vertically and horizontally and made 3D modeling of groundwater aquifers and used
additional data in the form of water balance to determine surplus and deficit research area.
Based on the results of the analysis and interpretation that have been carried out, the
groundwater aquifer layer is in sandstone lithology which has a resistivity value of around 20
m – 50 m. Based on depth, groundwater aquifers are divided into 2, namely shallow
groundwater aquifers at a depth of about 5 – 40 m with a thickness of 4 – 21 m and deep
groundwater aquifers at a depth of about 70 – 130 m with a thickness of 20 m – 50 m. The
researchers also conducted 1D and 2D correlations, which showed that the aquifer spreads
almost all over the trajectory. The 3D distribution map shows that the shallow groundwater
aquifer is getting thinner towards the east and the deep groundwater aquifer is getting thicker
towards the east. Recommendations for freatik aquifer are at points VES 2, VES 3, VES 10,
and VES 1, and recommendations for artesis aquifer at points VES 1, VES 7, VES 8, dan VES
9. The water balance condition shows that the research area has a surplus throughout 2017,
2020, and 2021 with a CH value greater than ETP.
Keywords: Aquifers, Geoelectricity, Dipole – Dipole, Water balance, Schlumberger

Item Type: Thesis (Other)
Uncontrolled Keywords: Aquifers, Geoelectricity, Dipole – Dipole, Water balance, Schlumberger
Subjects: Q Science > QE Geology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Eko Yuli
Date Deposited: 31 Aug 2022 03:56
Last Modified: 31 Aug 2022 03:56
URI: http://eprints.upnyk.ac.id/id/eprint/30833

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