Rapid Mapping of Landslides in the Western Ghats (India) Triggered by 2018 Extreme Monsoon Rainfall Using a Deep Learning Approach

Authors

Sansar Raj Meena, University of Salzburg
Omid Ghorbanzadeh, University of Salzburg
Cees J. van Westen, University of Twente
Thimmaiah Gudiyangada Nachappa, University of Salzburg
Thomas Blaschke, University of Salzburg
Ramesh P. Singh, Chapman UniversityFollow
Raju Sarkar, Delhi Technological University

Document Type

Article

Publication Date

1-5-2021

Abstract

Rainfall-induced landslide inventories can be compiled using remote sensing and topographical data, gathered using either traditional or semi-automatic supervised methods. In this study, we used the PlanetScope imagery and deep learning convolution neural networks (CNNs) to map the 2018 rainfall-induced landslides in the Kodagu district of Karnataka state in theWestern Ghats of India.We used a fourfold cross-validation (CV) to select the training and testing data to remove any random results of the model. Topographic slope data was used as auxiliary information to increase the performance of the model. The resulting landslide inventory map, created using the slope data with the spectral information, reduces the false positives, which helps to distinguish the landslide areas from other similar features such as barren lands and riverbeds. However, while including the slope data did not increase the true positives, the overall accuracy was higher compared to using only spectral information to train the model. The mean accuracies of correctly classified landslide values were 65.5% when using only optical data, which increased to 78% with the use of slope data. The methodology presented in this research can be applied in other landslide-prone regions, and the results can be used to support hazard mitigation in landslide-prone regions.

Comments

This article was originally published in Landslides in 2021. https://doi.org/10.1007/s10346-020-01602-4

Recommended Citation

Meena, S.R., Ghorbanzadeh, O., van Westen, C.J. et al. Rapid mapping of landslides in the Western Ghats (India) triggered by 2018 extreme monsoon rainfall using a deep learning approach. Landslides (2021). https://doi.org/10.1007/s10346-020-01602-4

Copyright

The authors

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.