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Spatial Analysis of Safety Factors due to Rain Infiltration in the Buyan-Beratan Ancient Mountains

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Sukasada and Sawan Subdistricts are areas in Buleleng Regency that are often hit by landslides due to their geological conditions, since they are composed of weathered volcanic rocks, consisting of intersections with faults and rock joints. A rainfall model analysis is carried out in order to determine the probability of precipitation, while WindRose is used to analyze the duration of the dominant rainfall. Furthermore, SoilVision is used to determine the grain size distribution. Meanwhile, the equations proposed by van Genuchten and Fredlund and Xing are used to estimate the Soil-Water Characteristic Curve (SWCC). The Green-Ampt model is also used to calculate infiltration capacity. Slope stability is analyzed using an infinite slope model in order to produce a spatial-temporal prediction map of slope stability in the form of safety factor (SF). The results of the hydrology analysis reveal that rain with an intensity of 87.32-92.27 mm/day, a duration of 6-7 days, and types of soil in each study location in Sukasada and Sawan Subdistricts affects the amount of infiltration and it, in turn, affects slope stability. Extrapolation results for the spatial-temporal map of landslide hazard reveal the classification of safety factor as follows, SF > 2.13 (low/stable), 1.40 < SF < 2.12 (moderate/critical) and SF < 1.39 (high/landslide).
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Spatial Analysis; Infinite Slope Stability; Infiltration; Rain Intensity; Safety Factor

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T. F. Fathani, D. Karnawati, and W. Wilopo, Promoting a Global Standard for Community-Based Landslide Early Warning Systems (WCoE 2014–2017, IPL-158, IPL-165), Adv. Cult. Living with Landslides, vol. 5, pp. 1–557, 2017.

I. N. Sinarta, Level of Threat of Land Movement in Volcanic Rocks in Bali Based on Comprehensive Geotechnical Approaches, 1st ed. Yogyakarta: Desertasi, 2018.

Pusdalop BPBD Provinsi Bali, Bali Province Disaster Report 2010-2014, Denpasar, 2015.

I. N. Sinarta, A. Rifa’i, T. F. Fathani, and W. Wilopo, Slope Stability Assessment Using Trigger Parameters and SINMAP Methods on Tamblingan-Buyan Ancient Mountain Area in Buleleng Regency, Bali, Geosciences, vol. 7, no. 4, p. 110, 2017.

P. M. Hadiwidjojo, H. Samodra, and T. . Amin, Geological Map of Bali, Nusa Tenggara, Bandung, 1998.

T. C. Pierson, Piezometric Response To Rainstorms In Forested Hillslope Drainage Depressions, J. Hydrol. (New Zealand), vol. 19, no. 1, pp. 1–10, 1980.

I. N. Sinarta, A. Rifa’i, T. F. Fathani, and W. Wilopo, Landslide Hazards Due To Rainfall Intensity in the Caldera of Mount Landslide Hazards Due To Rainfall Intensity in, 1st Warmadewa Univ. Int. Conf. Archit. Civ. Eng. Sustain. Des. Cult. 20th Oct. 2017, Fac. Eng. Warmadewa Univ. Bali LANDSLIDE, vol. 1, pp. 160–167, 2017.

Mendjel, D., Bekkouche, S., Messast, S., Boukhatem, G., Analysis of Uncertainty Effect on Slopes Reliability by Genetic Algorithm Method, (2018) International Review of Civil Engineering (IRECE), 9 (6), pp. 234-240.

H.-M. Tang, X. Liu, X.-L. Hu, and D. V. Griffiths, Evaluation of landslide mechanisms characterized by high-speed mass ejection and long-run-out based on events following the Wenchuan earthquake, Eng. Geol., vol. 194, pp. 12–24, Aug. 2015.

F. Guzzetti, A. Carrara, and R. Paola, Use of GIS Technology in the Prediction and Monitoring of Landslide Hazard, Nat. Hazards, vol. 20, no. November, pp. 117–135, 1999.

Patuti, I., Rifa'i, A., Suryolelono, K., Siswosukarto, S., Model of Timber Crib Walls Using Counterweight in Bone Bolango Regency Gorontalo Province Indonesia, (2018) International Review of Civil Engineering (IRECE), 9 (3), pp. 98-104.

K. P. Acharya, N. P. Bhandary, R. K. Dahal, and R. Yatabe, Seepage and slope stability modelling of rainfall-induced slope failures in topographic hollows, Geomatics, Nat. Hazards Risk, vol. 7, no. 2, pp. 721–746, 2016.

GEO-SLOPE International, Seepage Modeling with SEEP/W 2007, Geostudio Help., no. February, p. 307, 2010.

D. Karnawati, The Natural Disasters of the Land Mass Movement in Indonesia and its Mitigation Efforts, Yogyakarta: Departemen Teknik Geologi Fakultas Teknik Universitas Gadjah Mada, 2005.

S. Sosrodarsono and K. Takeda, Hydrology for Irrigation. Jakarta: PT. Pradnya Paramita, 2003.

V. Te Chow, D. R. Maidment, and L. W. Mays, Applied Hydrology. New York: McGraw-Hill, Inc., 1987.

L. W. Abramson, T. S. Lee, S. Sharma, and G. M. Boyce, Slope Stability and Stabilization Methods, 2nd ed. New York: John Wiley & Sons, Inc., 2002.

A. Rifa’i, Effect of matric suction changes on unsaturated soil parameter slope stability analiysis due to rainfall, Semin. Nasional-1- BMTTSSI-Konteks 5, pp. G15–G23, 2011.

S. H. Soenarmo, I. A. Sadisun, and E. Saptohartono, Preliminary Study of the Effect of Rainfall Intensity on Estimating Spatial Based Landslide Potentials in Bandung Regency, West Java, J. Geoaplika, vol. 3, pp. 133–142, 2008.

L. Chen and M. H. Young, Green-Ampt infiltration model for sloping surfaces, Water Resour. Res., vol. 42, no. 7, pp. 1–9, 2006.

D. G. Fredlund and H. Rahardjo, Soil Mechanics for Unsaturated Soils, John Wiley Sons, Inc., vol. 30, no. 2, pp. 113–123, 1993.

J. Bowles, Physical and Geotechnical Properties Of Soil, 2nd ed. Chicago: McGraw-Hill Company, 1984.

R. C. Ward, Floods: A geographical perspective, 1st ed. Macmillan, ISBN 10: 0333148924 / ISBN 13: 9780333148921, 1978.


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