Abstract: A landslide occurred at the hotel and residential area constructed at along the natural slope was monitored with an automatic instrumentation system. Factors that leads to the rainfall induced landslide were investigated. The instrumentation system was consisted of soil moisture probes, tensiometers, piezometers, slope inclinometers and a rain gauge. These probes are interconnected and data acquisition was completely automatic. The monitoring program started at the dry season of 2011 till the landslide occurred in the rain season in 2012. This paper introduces the design and installation of the monitoring program. It is concluded that the significant reduction of the matrix suctions and increased moisture content in the soil due to the precipitation were the major factors that leading to the slope failure at shallow depth.

Key words: AutomaticMonitoring, Landslide, Rainfall Induced, Instrumentation System