The resistivity geoelectric method is one of the geoelectric methods that is often used in geophysical and geotechnical surveys for relatively shallow exploration, including use in the exploration of springs, subsurface structural conditions and can also be used as a support for the exploration of mining materials. In exploration applications, the geoelectric (resistivity) method can provide information that is impossible to provide by other methods (Adhi 2007).

In the geoelectric method survey, potential difference values, current strength and rock resistivity values ​​will be obtained. The resistivity of rocks obtained directly is a pseudo resistivity which requires further data processing to obtain the actual resistivity for each layer. In geoelectric measurements of resistivity. Usually two C current electrodes are used on the surface. The magnitude of the potential at point P on the surface will be influenced by the two electrodes.

Modeling for estimating slip areas at this location was carried out by correlating field measurement resistivity data with Sondir test data. The modeling results show that the sliding plane is in the clay layer with a resistivity below 100 Ωm. Apart from that, on each measurement track several pockets of water were found with resistivity values ​​below 50 Ωm which caused the surrounding layer to become saturated with water (Saturated Zone). The presence of water pockets further aggravates the potential for damage at the landslide location. Grouping of sliding planes and saturated areas based on field resistivity values ​​refers to ASTM G5 7-06 (2012) and SNI 2528 – 2012.

The following are preparations for work tools and work materials:

• 1 12 volt dry battery
• 32 Current Conducting Electrode Rods
• 1 Set GBO DC Multi Channel Resistivity Meter
• 4 Make a Handy Talky
• 3 hammers
• 2 Rolls of cable @ 155 m
• 2 Roll Meter @100