Flood susceptibility mapping using machine learning boosting algorithms techniques in Idukki district of Kerala India

Kerala experiences a high rate of annual rainfall and flooding resulting in a frequent natural disaster. The objective of this study is to develop flood susceptibility maps for the Idukki district making use of Remote Sensing (RS) data, Geographic Information System (GIS), and Machine Learning (ML)....

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Bibliographic Details
Published in:Urban climate Vol. 49; p. 101503
Main Authors: Saravanan, Subbarayan, Abijith, Devanantham, Reddy, Nagireddy Masthan, KSS, Parthasarathy, Janardhanam, Niraimathi, Sathiyamurthi, Subbarayan, Sivakumar, Vivek
Format: Journal Article
Language:English
Published: Elsevier B.V 01.05.2023
Subjects:
Boosting algorithm
Flood
GEE
Idukki
Machine learning
SAR
Flood
SAR
Idukki
Boosting algorithm
GEE
Machine learning
ISSN:2212-0955, 2212-0955
Online Access:Get full text
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Summary:Kerala experiences a high rate of annual rainfall and flooding resulting in a frequent natural disaster. The objective of this study is to develop flood susceptibility maps for the Idukki district making use of Remote Sensing (RS) data, Geographic Information System (GIS), and Machine Learning (ML). In this study, five different ML models (Adaboost, Gradient boosting, Extreme Gradient Boosting (XGB), CatBoost, Stochastic Gradient Boosting (SGB)) are evaluated to determine flood susceptibility in Idukki district Kerala. There were a total of sixteen hydrometeorological parameters taken into account. Area under the curve (AUC) was used to evaluate the accuracy of various techniques in terms of both prediction and success rates. The validation results proved the efficiency of the individual techniques. The highest AUC was obtained by the SGB and GBC (92%), followed by that of the Adaboost with AUC 87%, and the lowest AUC was obtained by CatBoost, with AUC of 79%. The absence of data overfitting in all models demonstrates the efficacy of boosting techniques. The boosting algorithms penalize models that overfit the training set, which helps to decrease overfitting. Researchers and local governments could benefit from the proposed boosting techniques in the flood susceptibility mapping and mitigation strategies. •Unique geographical and climate, the Idukki district in Kerala is highly vulnerable to Natural disasters.•Considered 16 hydrometeorological flood conditioning factors.•Five boosting algorithm have been evaluated for flood susceptibility mapping.•Comparison of precision recall and f1-score for the models.
ISSN:2212-0955
2212-0955
DOI:10.1016/j.uclim.2023.101503