Pemetaan Potensi Air Tanah Menggunakan Metode Geolistrik 1D (Studi Kasus : Desa Tlogoagung, Kabupaten Lamongan)

Syaharani, Sophie Alivia (2024) Pemetaan Potensi Air Tanah Menggunakan Metode Geolistrik 1D (Studi Kasus : Desa Tlogoagung, Kabupaten Lamongan). Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5017201009_Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Kondisi Desa Tlogoagung, Kabupaten Lamongan, beberapa waktu terakhir mengalami kekurangan air, sehingga sumber potensi air tanah perlu ditinjau lebih lanjut. Penelitian ini bertujuan untuk menganalisis karakteristik resistivitas lapisan batuan di Desa Tlogoagung, Kabupaten Lamongan sehingga dapat diketahui potensi air tanah di desa tersebut. Metode yang digunakan dalam penelitian ini adalah metode Vertical Electrical Sounding (VES) dengan konfigurasi Schlumberger. Pengukuran dan analisa data VES dilakukan pada 6 titik untuk mendapatkan nilai resistivitas bawah permukaan bumi dengan data pendukung berupa elevasi, peta geologi, peta hidrogeologi, dan kedalaman sumur warga sekitar. Hasil analisa data menunjukkan bahwa akuifer air tanah diduga terdapat pada lapisan lempung pasiran dengan resistivitas sebesar 11,40 Ohm.m dengan kedalaman 21,8 m sampai 62,8 m pada titik pengukuran VES 4 dan terdapat juga pada titik pengukuran VES 5 yang berada pada kedalaman 23 m sampai 42,3 m dengan resistivitas sebesar 7,24 Ohm.m. Dugaan potensi air tanah pada titik VES 4 dan VES 5 divalidasi dengan peta geologi, peta hidrogeologi, dan data kedalaman sumur warga setempat yang berada pada rentang 35 m sampai 40 m. Pola aliran yang berada di Desa Tlogoagung berasal dari arah barat daya dan dominan menuju ke utara. Dimana, apabila dikorelasikan dengan hasil pengukuran geolistrik maka arah pergerakan aliran air tanah cocok dengan hasil interpretasi berdasarkan nilai resistivitas, bahwa potensi air tanah berada pada arah utara.

Kata kunci: Air Tanah, Geolistrik, Schlumberger
========================================================================================================================
The condition of Tlogoagung Village, Lamongan Regency, has recently experienced water shortages, so the potential source of groundwater needs to be reviewed further. This research aims to analyze the resistivity characteristics of rock layers in Tlogoagung Village, Lamongan Regency so that the potential of groundwater in the village can be known. The method used in this research is Vertical Electrical Sounding (VES) method with Schlumberger configuration. Measurement and analysis of VES data were carried out at 6 points to obtain subsurface resistivity values with supporting data in the form of elevation, geological maps, hydrogeological maps, and well depths of local residents. The results of data analysis show that the groundwater aquifer is suspected to be located in the sandy clay layer with a resistivity of 11,40 Ohm.m with a depth of 21,8 m to 62,8 m at VES 4 measurement point and there is also a VES 5 measurement point located at a depth of 23 m to 42,3 m with a resistivity of 7,24 Ohm.m. The alleged groundwater potential at VES 4 and VES 5 points is validated by geological maps, hydrogeological maps, and data on the depth of local residents' wells in the 35 m to 40 m range. The flow pattern in Tlogoagung Village originates from the southwest and dominantly heads north. When correlated with the results of geolectrical measurements, the direction of groundwater flow movement matches the interpretation results based on resistivity values, that the groundwater potential is in the north.

Keywords: Groundwater, Geoelectric, Schlumberger

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kata kunci: Air Tanah, Geolistrik, Schlumberger ============================================================ Keywords: Groundwater, Geoelectric, Schlumberger
Subjects:	Q Science > QC Physics > QC665.E38 Electric fields.
Divisions:	Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Sophie Alivia Syaharani
Date Deposited:	09 Aug 2024 02:03
Last Modified:	09 Aug 2024 02:03
URI:	http://repository.its.ac.id/id/eprint/114396

Actions (login required)

View Item