Abstract
In the last five years, landslide occurred many times in this area. The worst landslide was in 2014, which destroyed many houses and infrastructure such as road, water supply utilities and electricity. This study proposed an identification of landslide method by using of geo electricity as subsurface investigation of landslide. This study aims to identify the type of landslide and slip surface potential by using emergence of 2D spatial imaging. The application of geophysical has not been used as a result of landslide identification. The well-known argument state that geophysical is the only way to make images on the type and rock by using resistivity. The geological and soil physical properties required by engineers to analyse landslide potential are not well presented. As a consequence, the solution of soil reinforcement on landslide prone area to minimize the risk is presented as an engineering judgment of problem solving. Therefore, this paper discusses about soil properties and imaging to identify the area affected by future landslide. By using a multi-electrode electrical array, the 2D geophysical imaging was used to investigate the complex structure of soil stratigraphy and geological properties. The results showed that the area of the study was shown as a stable area with andesite intrusion. In addition, some areas were suspected as landslide prone area which was indicated resources by saturated clay of soil beneath.
Highlights
As a country that has a tropical climate, Indonesia has two seasons, the rainy season and dry season, as its characteristics
According to the National Disaster Management Agency (BNPB), this situation makes Indonesia experience quite extreme weather changes, temperature and wind direction. This condition is one of the triggers for various hydrogeological disasters such as floods, landslides, forest fires and drought that often occur in Indonesia
Data and Information on Disaster in Indonesia (BNPB) recorded 20.5 percent of disasters in Indonesia is a landslide that occurred in the year 2010 - 2016
Summary
As a country that has a tropical climate, Indonesia has two seasons, the rainy season and dry season, as its characteristics. According to the National Disaster Management Agency (BNPB), this situation makes Indonesia experience quite extreme weather changes, temperature and wind direction. This condition is one of the triggers for various hydrogeological disasters such as floods, landslides, forest fires and drought that often occur in Indonesia. Those disasters have physical, psychological and economic impacts for people in disaster prone areas. The topographic condition of Semarang City consists of hills, lowland and coastal areas. The diverse topographic condition make Semarang City alert to landslide disaster. Some of the land contours in the area are hills and fault areas with unstable soil structures
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