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

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

doi:https://doi.org/10.5194/nhess-23-1095-2023

Articles | Volume 23, issue 3

https://doi.org/10.5194/nhess-23-1095-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-23-1095-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 3

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

Data sets

geoportal PH Soil Type Layer geoportal PH https://www.geoportal.gov.ph/

Model code and software

glmnet: Lasso and Elastic-Net Regularized Generalized Linear Models J. Friedman, T. Hastie, R. Tibshirani, B. Narasimhan, K. Tay, N. Simon, J. Qian, and J. Yang https://cran.r-project.org/web/packages/glmnet/

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.