IDENTIFIKASI DAERAH RAWAN GERAKAN TANAH DI KOTA LIWA, LAMPUNG BARAT MENGGUNAKAN METODE GEORADAR DAN GEOLISTRIK
Georadar method with radar reflection profiling configuration and geoelectrical method with dipole-dipole configuration has been done to determine the lithology, fracture characteristics of weak zone or fault that could potentially result of mass movement in Liwa, Lampung Barat. This research was co...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/130278/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=70695 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Georadar method with radar reflection profiling configuration and
geoelectrical method with dipole-dipole configuration has been done to determine
the lithology, fracture characteristics of weak zone or fault that could potentially
result of mass movement in Liwa, Lampung Barat. This research was conducted
in 11 lines.
Reflexwave software has been used in georadar data processing obtained
from the result of GSSI surveyor 20 measurements. There are six steps to process
the data measurement, conversion time to depth, automatic gain control,
deconvolution, diffraction stack, migration and static correction to eliminate
noise from the data in order to obtain radargram section. In addition,
Earthimager 2DINV software has been used in geoelectrical processing data from
the measurement of multichannel supersting R8. Inversion from apparent
resistivity to actual resistivity has been conducted to interpret subsurface section.
The identified mass movement in this research have been indicated by the result of
both methods the mass movement by line 1, 2, 5 with the type of translation mass
movement and line 5, 7, 8 with the type of creep mass movement.
Liwa subsurface structure is arranged by quartenary sediment, clay (1-
100 �m), sand (8 � 4000 �m) and igneous rock, granit ( 5.000 � 1.000.000 �m)
and from the results of the data analysis found that indication of a weak zone of
the fault by line 1, 2, 3, 5, 6. |
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