Prediction of debris flow disaster in Palongzangbu Basin based on GBDT model and ArcGIS
Abstract
The purpose of this study is to use the gradient boosting decision tree ( GBDT ) model to predict the debris flow disaster in the Palongzangbu Basin, and to combine ArcGIS for spatial visualization. We selected key features such as terrain slope, accumulation fan area, longitudinal slope, source area, precipitation, and distance to the fault to construct the GBDT model to quantify the impact of each feature on the occurrence of debris flow. The results show that slope ( 21.30 % ) and accumulation fan area ( 20.10 % ) are the main influencing factors of debris flow. Combined with ArcGIS mapping technology, we generated a debris flow risk distribution map, clearly identified high-risk areas in the basin, and provided a scientific basis for disaster prevention and mitigation. This study verifies the effectiveness of the GBDT model in debris flow disaster prediction, and shows the key role of geographic information system in disaster risk management, which provides an important reference for future disaster warning and prevention.
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References
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