Articles | Volume 23, issue 3
https://doi.org/10.5194/nhess-23-1095-2023
https://doi.org/10.5194/nhess-23-1095-2023
Research article
 | 
15 Mar 2023
Research article |  | 15 Mar 2023

Multi-event assessment of typhoon-triggered landslide susceptibility in the Philippines

Joshua N. Jones, Georgina L. Bennett, Claudia Abancó, Mark A. M. Matera, and Fibor J. Tan

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Cited articles

Abancó, C., Bennett, G. L., Matthews, A. J., Matera, M. A. M., and Tan, F. J.: The role of geomorphology, rainfall and soil moisture in the occurrence of landslides triggered by 2018 Typhoon Mangkhut in the Philippines, Nat. Hazards Earth Syst. Sci., 21, 1531–1550, https://doi.org/10.5194/nhess-21-1531-2021, 2021. 
Balderama, O. F., Alejo, L. A., and Tongson, E.: Calibration, validation and application of CERES-Maize model for climate change impact assessment in Abuan Watershed, Isabela, Philippines, Climate, Disaster and Development Journal, 2.1, 11–20, https://doi.org/10.18783/cddj.v001.i02.a02, 2016. 
Carating, R.: PHILIPPINES: Final Report on the Harmonized World Soil Database Project, DigitalSoilMap.Net Project, funded by the Institute of Soil Science Chinese Academy of Science, Nanjing, China, https://www.academia.edu/20867911/PHILIPPINES_Final_Report_on_the_Harmonized_World_Soil_Database_Project_DigitalSoilMap_Net_Project?auto=download (last access: 14 March 2023), 2013. 
Crozier, M. J.: A proposed cell model for multiple-occurrence regional landslide events: Implications for landslide susceptibility mapping, Geomorphology, 295, 480–488, https://doi.org/10.1016/J.GEOMORPH.2017.07.032, 2017. 
DENR-MGB: Geological Map of Municipality of Ilagan, Isabela, 1 : 90 000 Scale, Department of Environment and Natural Resources-Mines and Geosciences Bureau, Quezon City, Philippines, 1976. 
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Short summary
We modelled where landslides occur in the Philippines using landslide data from three typhoon events in 2009, 2018, and 2019. These models show where landslides occurred within the landscape. By comparing the different models, we found that the 2019 landslides were occurring all across the landscape, whereas the 2009 and 2018 landslides were mostly occurring at specific slope angles and aspects. This shows that landslide susceptibility must be considered variable through space and time.
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