LANDSLIDE POTENTIAL MAPPING IN PENGGUNG PURWOSARI VILLAGE, DISTRICT GIRIMULYO, KULONPROGO, YOGYAKARTA PROVINCE, INDONESIA USING DIPOLEDIPOLE RESISTIVITY METHOD
Penulis/Author
Prof. Dr. Sismanto, M.Si. (1); NASHARUDDIN (2)
Tanggal/Date
2018
Kata Kunci/Keyword
Abstrak/Abstract
A Geophysical survey using resistivity method with Schlumberger and Dipoledipole
configuration had been used to determine subsurface landslide area at
Penggung Purwosari Village area of Girimulyo, Kulonprogo Yogyakarta in
Indonesia. This study aims to determine the structure of the subsurface layer using 1D
and 2D resistivity methods, as well as to know the characteristics of slip-surface and
type of ground movement that would occur. The result of resistivity data processing
shows that the variation of subsurface resistivity value consists of three layers. The
first layer is characterized by a resistivity value of <9?m interpreted as soil saturated
with water in the form of surface soil, the second layer is characterized by a resistivity
value of 9-36?m is interpreted as a water-unsaturated soil layer, and the third layer is
characterized by a resistivity value of 36-70?m interpreted as a base layer (bedrock)
of andesitic-breccia. The soil and weathering layer can be accumulated above a
curved bedrock interpreted as a layer that has a possibility to create slippage plane
and produced a rotational slide and has the volume about 790,612m3
. Areas with high
landslide vulnerability could be at north and north-west of the study area.
