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Surface Geology Characteristic and Its Influence to Landslide Potential in Cisokan Drainage Pattern, West Bandung, Indonesia

Novian Triandanu 1, Ichsan Alfan 1, and Dicky Muslim 2
1. Faculty of Geology, Padjadjaran University, Jatinangor 45363, Indonesia
2. Postgraduate Program of Geology, Padjadjaran University, Bandung 40115, Indonesia

Abstract—Study area is located around Cisokan Drainage Pattern, West Bandung, Indonesia. Topography characteristic around the study area is hilly landform with steep – very steep slope. Study of slope stability become necessary to prevent and to minimize the effect of landslide. The aim of this research is to analyze the slope characteristic that may cause landslide. Several methods used in this study such as desk studies and fieldwork. Desk studies consist of geomorphology analysis and using geological software. Fieldwork consist of geological surface mapping, outcrop analysis, rock sampling, and joint density mapping. Result of this study shows that the average orientation of strike and dip is NE-SW. Joint density analysis shows that the average orientation of major stress is relative to NW-SE. Fault Plane analysis shows that there are two major faults in this study area, there are oblique strike-slip dominated fault and normal fault which has major stress relatively oriented to NW-SE and NE-SW. The conclusion of this research is that the study area is highly prone to landslide due to steep – very steep slopes, the presence of soft sedimentary rocks, tectonic influence, rock weakening due to the presence of intensive joint, high erosion activity, weather influence and land clearing in several area, located in shear zone which has high tectonic influence and become highly potential to reactivate and affect the durability of slope and may cause landslide. 
 
Index Terms—landslides, cisokan drainage pattern, west bandung

Cite: Novian Triandanu, Ichsan Alfan, and Dicky Muslim, "Surface Geology Characteristic and Its Influence to Landslide Potential in Cisokan Drainage Pattern, West Bandung, Indonesia," International Journal of Structural and Civil Engineering Research, Vol. 5, No. 2, pp. 147-150, May 2016. doi: 10.18178/ijscer.5.2.147-150