Abstract
Land movement occurs due to reduced soil strength which is affected by water pressure. The Self Potential (SP) method is a geoelectric method that can detect well the flow of groundwater. The Self Potential method can also be used to detect the presence of debris flow in the form of weathered soil, tuff sand, cobble gravel and other rock fragments that have mixed with water. Based on the results of the SP measurement, debris flow has a medium SP with a value (3 - 12) mV, rock that has shifted (sandstone associated with andesite fragment) has a SP value < 2mV, while water seepage and water flow has an SP value (13 - 36) mV.
Highlights
Ling-Anjung region, Pasanggrahan Baru District, Sumedang Regency is a vulnerable area of land movement
The results obtained in this research were 3 section of self potential (SP)
The debris flow is weathered soil, tuff sand, cobble gravel and other rock fragments that have mixed with water
Summary
Ling-Anjung region, Pasanggrahan Baru District, Sumedang Regency is a vulnerable area of land movement. The land movement in this area is still active to day. This can be seen from the condition of the houses of the residents who experienced cracks and the erosion that is still going on until now. Land movement is a geological event that occurs due to the movement of slope-forming material in the form of soil, rock or a combination of these types of material to a lower place due to the influence of gravitational force [1]. Land movement is a geological phenomenon to get a new balance due to the influence of external disturbances that causes a reduction in shear strength and an increase in soil shear stress [2;3].
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