| Summary: | A real-time monitoring for early warning of landslide has been developed in Banjarnegara Regency of Central Java, Indonesia. The fieldserver gathers the data from multiple sensors i.e. long-span extensometers, rain gauge, network camera and water pressure gauge. The results of real-time monitoring will be utilized to assess the effect of rainfall intensity on landslide activity by examining the relationship of landslide displacement and groundwater level fluctuation. Tank model is used to simulate the groundwater level for future rainfall events. The results indicated that the change of groundwater level of Banjarnegara Landslide can be predicted by using two cascading tank model. Furthermore, the movement of rainfall-induced landslide can be estimated by combining the predicted result of groundwater level and its relation with slope displacement. It was clarified that shallow groundwater level found in Banjarnegara Landslide more tends to be influenced by rainfall rapidly. The displacements of Banjarnegara landslide have a wide-range 1nterval of about 300 mm, much higher than that happened at the deep-seated landslide. Finally, the change in displacement due to rainfall events can be used to determine the warning criteria for rainfall-induced landslides.
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