Aplikasimetode Very Low Frequency Electromagnetic (VLF-EM) Untuk Identifikasi Sungai Bawah Permukaan Di Sumber Mata Air Krawak, Kabupaten Tuban

Priambodo, Ilham Adi (2022) Aplikasimetode Very Low Frequency Electromagnetic (VLF-EM) Untuk Identifikasi Sungai Bawah Permukaan Di Sumber Mata Air Krawak, Kabupaten Tuban. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bentang alam karst merupakan bentang alam yang cukup unik karena morfologi yang dihasilkan salah satunya adalah sungai bawah permukaan. Sungai bawah permukaan memiliki peran penting bagi masyarakat yang tinggal di kawasan karst karena memliki banyak fungsiterlebih menyediakan kebutuhan air bersih sehingga sangat penting bagi peneliti dan warga sekitar untuk mengetahui posisi dan melakukan konservasi alam sekitar sungai bawah permukaan yang terletak di Sumber Mata Air Krawak ini. Penelitian ini dilakukan dengan tujuan untuk mengetahui pola sungai bawah permukaan yang berada di bentang alam karst Sumber Mata Air Krawak. Penelitian dilakukan dengan menggunakan Metode Very Low Frequency-Electromagnetic (VLF-EM) dimana metode ini banyak digunakan untuk survei geofisika dengan target dangkal, salah satunya adalah sungai bawah permukaan. Penelitian dilakukan sebanyak lima lintasan dengan empat lintasan sepanjang 250 hingga 300 meter dan satu lintasan sepanjang 70 meter. Penelitian yang dilaksanakan ini diharapkan bisa mendapatkan arah kemenerusan dan kedalamandari sungai bawah permukaan dan menjadi acuan serta penambahan informasi mengenai akuisisi Geofisika di daerah sekitar.Setelah dilakukan pengolahan data VLF-EM secara kuantitatif (inversi) dan kualitatif (filter Fraser dan K-Hjelt) didapatkan pola aliran sungai bawah permukaan yang mengalir dari arah Timur Laut-Barat dayadengan kedalaman sekitar 0-20 meter.
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Karst landscape is a landscape that is quite unique because the resulting morphology, one of themis a subsurface river. Subsurface rivers have an important role for people who live in karst areas because they have many functions, especially providing clean water, so it is very important for researchers and local residents to know the position and conserve nature around the subsurface river located in the Krawak Springs. This research was conducted with the aim of knowing the pattern of subsurface rivers in the karst landscape of the Krawak Springs. The research was conducted using the Very Low Frequency¬-Electromagnetic (VLF-EM) method where this method is widely used for geophysical surveys with shallow targets, one of which is a subsurface river. The research was carried out in five tracks with four tracks along the 250 to 300 meters and one track along the 70 meters. This research is expected to be able to get the direction of the continuity and depth of the subsurface river and be a reference and additional information regarding the acquisition of Geophysics in the surrounding area. After processing the VLF-EM data quantitatively (inversion) and qualitatively (Fraser and K-Hjelt filters), the subsurface river flow pattern flows from the NorthEast-SouthWestdirection with a depth of about 0-20 meters.

Item Type:	Thesis (Other)
Additional Information:	RSGf 622.153 Pri a-1 2022
Uncontrolled Keywords:	VLF-EM, subsurface river, karst, subsurface river
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN269 Prospecting--Geophysical methods
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Anis Wulandari
Date Deposited:	09 Nov 2022 06:46
Last Modified:	09 Nov 2022 06:48
URI:	http://repository.its.ac.id/id/eprint/95076

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