Identifikasi Kemenerusan Sistem Sungai Bawah Tanah Menggunakan Metode Very Low Frequency (VLF) Di Kuniran, Pacitan

Amrin, Ikmal (2018) Identifikasi Kemenerusan Sistem Sungai Bawah Tanah Menggunakan Metode Very Low Frequency (VLF) Di Kuniran, Pacitan. Undergraduate thesis, INSTITUT TEKNOLOGI SEPULUH NOPEMBER.

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Abstract

Kompleksitas permasalahan di daerah karst memerlukan metode geofisika yang khusus. Salah satu metode geofisika yang dapat dimanfaatkan untuk keperluan eksplorasi daerah karst di Kuniran, Pacitan adalah metoda VLF. Tujuan penelitian tugas akhir untuk mengidentifikasi kemenurusan sistem sungai bawah tanah dengan menggunakan metode VLF, Terdapat 6 lintasan pengukuran, dimana 4 lintasan Panjang 350-400 meter dengan jarak antara lintasan 10 meter dan 2 lintasan dengan Panjang 600-700 meter dengan jarak antar lintasan 25 meter. Data yang diperoleh berupa data tilt dan elips dengan frekuensi 22.300 dan 19.600, hasil dari pengolahan ini merupakan penampang Rapat Arus Ekivalen. Rapat Arus Ekivalen sebanding dengan nilai konduktivitas, jika nilai Rapat Arus Ekivalen tinggi maka nilai konduktivitas tinggi. Anomali dengan konduktivitas tinggi dianggap sebagai rongga berisi air penuh, nilai anomali Rapat Arus Ekivalen tinggi berkisar 4,07-13,96 yang tersebar pada kedalaman 10-50 meter, arah kemenurusan sistem sungai bawah tanah timur-barat. ============ The complexity of the problem in the karst area requires a special geophysical method. One of the geophysical methods that can be utilized for karst exploration in Kuniran, Pacitan with the VLF method. The purpose of the final project to identify the management of underground river system by using VLF method. There are 6 lines, four lines of which length 350 - 400 meters with distance 10 meters and Two lines with Length 600-700 meters with distance 25 meters . The data obtained are tilt and ellipticity data with frequency 22.300 and 19.600, the result of this processing is a cross section of Equivalent Flow Meeting. Equivalent Flow Meeting is proportional to the con ductivity value, if the value of the Equivalent Flow Meeting is high, so the conductivity value high too. Anomalies with high conductivity are considered full -fledged water cavities, anomalous values of high Current Equivalent Flow meeting ranging from 4.07 to 13.96 spread over 10-50 meters depth, direction of the east-west subway system.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Metode VLF; Rapat Arus Ekivalen; sungai bawah tanah; VLF Method; Equivalent Flow Meeting; underground water
Subjects: G Geography. Anthropology. Recreation > GB Physical geography > GB1197.7 Groundwater flow. Reservoirs
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > (S1) Undergraduate Theses
Depositing User: Ikmal Amrin
Date Deposited: 01 Feb 2018 03:53
Last Modified: 01 Feb 2018 03:53
URI: http://repository.its.ac.id/id/eprint/51044

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