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ITS » Research Report » Fisika
Posted by dwi at 19/02/2008 17:14:39  •  17911 Views


PENENTUAN BIDANG GELINCIR PADA DAERAH RAWAN LONGSOR MELALUI PENGUKURAN KARAKTERISTIK KELISTRIKAN BUMI

Author :
Makky Sandra Jaya 




ABSTRAK

Untuk menghindari kejadian tanah longsor maupun bencana yang ditimbulkannya maka perlu dilakukan sistem peringatan dini tindakan pencegahan bencana tanah longsor. Informasi tentang kondisi lapisan dan struktur bawah permukaan serta mekanisme tanah longsor yang mungkin terjadi perlu disusun secara akurat dan informatif sebagai bagian dari sistem peringatan dini tersebut. Berdasarkan karakteristik kelistrikan bumi yang diperoleh melalui penerapan metode geolistrik dapat dibuat gambaran kondisi fisis dan struktur lapisan di bawah permukaan. Telah dilakukan penelitian pada Kecamatan Prigen Kabupaten Pasuruan melalui penerapan metode geolistrik dengan teknik pengukuran Wenner. Hasil dari metode geolistrik pada tiap lapisan didominasi oleh jenis tanah lanauan dan pasiran yang mempunyai harga resistivitas dari 15-150 Ohmmeter sesuai dengan data bor dari Laboratorium Mekanika Tanah dan Mineral ITS. Sudut bidang gelincir antara jarak 38-52 meter adalah 3765. Sedangkan sudut bidang gelincir pada jarak antara 24-38 meter adalah sebesar 227.


ABSTRACT

To avoid the occurrence of landslide and also disaster generated hence require to be done the early-warning system. Information about condition of field sub-surface structure and landslide mechanism whichs possible happened require to be compiled in accurate figure and informative as part of the early-warning system. Pursuant to characteristic of earth electricity that obtained by applying of geo-electrical method can be made the model of physical condition and sub-surface structure. We have been conducted the research at Prigen Sub-district Pasuruan Regency through applying of geo-electrical method with the Wenner technique of measurement. The result from this method that every layer predominated by lanauan and pasiran. The resistivity value of this layers have a range from 15-150 Ohmmeter as according to logging data from Laboratory of Rock-mechanics and Mineral ITS. Corner slip between distances 38-52 meters is 3765 degree while corner slip between distances 24-38 meters is 227 degree.



KeywordsTanah longsor ; Kelistrikan bumi
 
Subject:  Geofisika
Date Create: 19/02/2008
Type: Text
Format: pdf ; 42 pages
Language: Indonesian
Identifier: ITS-Research-3100005066124
Collection ID: 3100005066124
Call Number: ITS 551.307 San p


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