Integrasi Metode Self Potential dan Metode Very Low Frequency-Electromagnetic untuk Identifikasi Nilai Potensi Tanah Longsor di Sekitar Jalan Raya Trenggalek-Ponorogo KM-23

Fahrina, Noviantika (2018) Integrasi Metode Self Potential dan Metode Very Low Frequency-Electromagnetic untuk Identifikasi Nilai Potensi Tanah Longsor di Sekitar Jalan Raya Trenggalek-Ponorogo KM-23. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kabupaten Ponorogo merupakan salah satu daerah di Indonesia yang sering mengalami longsor, khususnya di sekitar daerah Jalan Raya Ponorogo-Trenggalek KM-23. Oleh karena itu, perlu dilakukan identifikasi nilai potensi longsor untuk meminimalisir kerugian akibat longsor. Yang dapat dilakukan melalui identifikasi bawah permukaan menggunakan metode Very Low Frequency-Electromagnetic (VLF-EM) dan penentuan aliran fluida bawah permukaan menggunakan metode Self-Potential (SP). Hasil dari pengukuran data VLF EM dan SP di sekitar daerah Jalan Raya Ponorogo-Trenggalek KM-23 ialah dengan metode SP mendapatkan anomali yang berupa anomali dipole dan monopole yang mengindikasikan adanya rekahan dan aliran fluida. Yang berkorelasi dengan metode VLF-EM yang ditunjukkan dengan persebaran fluida berdasarkan nilai resistivitas rendah (± 2-10 Ωm). Selain itu, peneltan ini mengindikasikan bahwa aliran fluida berasal dari arah barat menuju timur dengan kedalaman berkisar 1-6 m. Keberadaan rekahan dan aliran fluida bawah tanah ini menjadi penyebab daerah penelitian merupakan daerah rawan longsor. ============================================================================= Ponorogo is one of the region in Indonesia prone to landslide, especially especially around the area of Jalan Raya Ponorogo-Trenggalek KM-23. Thus, important to identifying landslide potential for minimized losses due landslide by identifying the subsurface in landslide prone areas using integrated Very Low Frequency of Electrommagnet (VLF-EM) and can be performed soil subsurface analysis and flow direction of fluid in the ground Self Potential (SP) method. The result measurement of VLF-EM and SP data around Ponorogo-Trenggalek KM-23 Highway is SP method to get anomaly in the form of anomalies dipole and monopole which indicate the existence of fracture and fluid flow. Which correlates with the VLF-EM method shown by the fluid spread based on the low resistivity value (± 2-10 Ωm). In addition, this designation indicates that the fluid flow is from west to east with depths ranging from 1 to 6 m. The existence of fractures and the flow of underground fluid is the cause of the research area is prone to landslides.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Fluida, Longsor, Resistivitas, Self-Potential, Very Low Frequence Electromagnet
Subjects: Q Science
Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General) > TA710 Soil stabilization
Divisions: Faculty of Mathematics and Science > Physics > (S1) Undergraduate Theses
Depositing User: Noviantika Fahrina
Date Deposited: 09 Apr 2018 02:31
Last Modified: 09 Apr 2018 02:31
URI: http://repository.its.ac.id/id/eprint/50560

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