Improvement of the Evaluation Model for Driftwood Generation During Heavy Rain Considering Soil Water Index and Examination of the Risk Reduction Effects of Erosion Control Facilities

Key Points

• To enhance the evaluation model for driftwood generation during heavy rain by incorporating the soil water index and assess erosion control facilities' impact.
• Improved logistic model for driftwood assessment using soil water index.
• Validation of the model on unlearned river systems.
• Evaluation of the contribution of erosion control facilities to driftwood reduction.
• Incorporating soil water index information improved the logistic model performance.
• The application of the logistic model for driftwood generation was validated.
• Quantitative assessment showed the effectiveness of erosion control facilities post-H29 heavy rain.