Aplikasi Metode Geolistrik Tahanan Jenis Untuk Identifikasi Zona Bidang Gelincir Tanah Longsor Studi Kasus Desa Nglajo Kec. Cepu Kab. Blora

Yuliana, Eka (2017) Aplikasi Metode Geolistrik Tahanan Jenis Untuk Identifikasi Zona Bidang Gelincir Tanah Longsor Studi Kasus Desa Nglajo Kec. Cepu Kab. Blora. Undergraduate thesis, Institut teknologi Sepuluh Nopember.

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Abstract

Metode geofisika semakin banyak digunakan untuk investigasi tanah longsor. Longsor secara periodik dipicu oleh curah hujan kritis, dan distribusi kadar air bawah permukaan merupakan faktor kunci yang mempengaruhi stabilitas lapisan tanah. Begitu pula yang ditemui disekitar Jalan Taman Bahagia sebelah selatan Taman Makam Pahlawan Nglajo Kecamatan Cepu terjadi gerakan permukaan tanah yang menyebabkan jalan utama komplek perumahan Nglajo rusak walaupun sudah beberapa kali diperbaiki. Analisa data lapangan diperoleh berdasarkan survei geolistrik tahanan jenis dengan metode konfigurasi Wenner dan Dipole-dipole. Zona bidang gelincir dapat terlihat pada penampang resistivitas 2D yang teletak di lintasan 2, 3 dan 4. Dimana bidang gelincir pada daerah penelitian merupakan bidang batas antara batuan dengan nilai resistivity kurang dari 2,4 Ωm diinterpretasikan sebagai batuan aluvium berupa batuan lempung dari Formasi Lidah tersebar dan membentang dari arah utara ke selatan. dengan kedalaman yang berbeda-beda dari 0,5 hingga 11 meter dibawah permukaan tanah. ================================================================= Geophysical methods are increasingly being used for landslide investigations. Landslides are periodically triggered by critical rainfall, and subsurface water distribution is a key factor affecting the stability of the soil layer. Similarly, encountered at Taman Bahagia street around south of the Heroes Cemetery Nglajo Cepu Sub-District there was a ground surface movement that caused the main road of Nglajo housing complex was damaged although it has been repaired several times. Field data analysis where resistivity values obtained are based on electrical resistivity surveys using Wenner and Dipole-dipole configuration methods. The slip surface zone can be seen in the 2D resistivity cross sections that located on tracks 2, 3 and 4. Where the slip surface in the study area is the boundary area between the rocks with a resistivity value of less than 2.4 Ωm interpreted as alluvium rock in the form of clay rock from the spreaded Lidah Formation And stretching from north to south. With different depths from 0.5 to 11 meters below ground level.

Item Type: Thesis (Undergraduate)
Additional Information: RSFi 620.169 7 Yul a
Uncontrolled Keywords: Resistivitas, Tanah Longsor, dan Zona Bidang Gelincir, Resistivity, Landslide, and Slip Field Zone
Subjects: Q Science > QC Physics
Q Science > QE Geology > QE571 Sedimentation and deposition. Sediment transport.
Divisions: Faculty of Mathematics and Science > Physics > (S1) Undergraduate Theses
Depositing User: EKA YULIANA
Date Deposited: 30 Nov 2017 06:25
Last Modified: 30 Nov 2017 06:25
URI: http://repository.its.ac.id/id/eprint/44118

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