A Coupled Hydrology/Slope Kinematics Model for Developing Early Warning Criteria in the Kalitlaga Landslide, Banjarnegar
The tropical climatic condition of Indonesia brings consequences of high activity of landslide in the area. Although, studies of landslide activity and rainfall as triggering factor have been introduced in many research papers, the implementation of the r
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Abstract The tropical climatic condition of Indonesia brings consequences of high activity of landslide in the area. Although, studies of landslide activity and rainfall as triggering factor have been introduced in many research papers, the implementation of the research on the regional area which has particular geological and climate condition is significant. This study has potential meaning to develop early warning systems that may avoid damage and loss of human lives in the area. In this research, field monitoring data have been assessed in Kalitlaga Village, Banjarnegara Regency, Central Java Province to develop coupled hydrology/slope kinematics model of landslide. To simulate the groundwater levels in the landslide, a hydrological model with two series of tank represented the geological setting of the area is applied. Groundwater output from the model was used in visco-plastic kinematics model to simulate the velocity of landslide movement. Calibration and verification of the model on the recorded data of groundwater and displacement data showed good results. The peak velocity from the combined model is then classified based on rainfall record of the previous landslide which happened near the area. Velocity that considered being critical condition is used as additional precursor of early warning system of Kalitlaga landslide. Keywords Hydrological model system
Visco-plastic Tank model Early warning
F. Faris (&) Graduate Student of Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan e-mail: [email protected] F. Faris F. Fathani Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jalan Grafika No. 2, Yogyakarta 55281, Indonesia
F. Wang et al. (eds.), Progress of Geo-Disaster Mitigation Technology in Asia, Environmental Science and Engineering, DOI: 10.1007/978-3-642-29107-4_26, Ó Springer-Verlag Berlin Heidelberg 2013
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F. Faris and F. Fathani
1 Introduction Field investigations and laboratory analysis have revealed that the implementation of early warning system in landslide studies is important in landslide disaster management and control. A reliable landslide early warning system directly associates with good warning criteria. Comprehensive study about landslide mechanism derives warning criteria which integrates the triggering factors and probable landslide events. In the focus of rainfall triggered landslides, hydrological factors and its influences on landslide stability should be assessed to improve a better understanding of particular landslide mechanism. To facilitate landslide assessment and early warning system development, preliminary investigation and real-time field monitoring equipment was set up in Kalitlaga Village, Banjarnegara District, Central Java Province of Indonesia as a pilot project (Fathani et al. 2008). The development of the project in the area was part of the Asian Joint Research Project for early warning system on landslides disaster mana
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