Threshold-Based Landslide Early Warning Method

Description

This method estimates landslide likelihood by comparing accumulated precipitation against predefined rainfall thresholds. It integrates both observed and forecast precipitation data to assess short-term triggering conditions.

Data Sources

• ECMWF Forecast Precipitation (10 KM Resolution)
• MSWEP (Multi-Source Weighted-Ensemble Precipitation)

Methodology

• Retrieve precipitation data from ECMWF (forecast) and MSWEP (observed).
• Compute cumulative rainfall using backward aggregation.
• Compare accumulated rainfall with predefined thresholds.
• Flag areas where thresholds are exceeded as potential landslide risk.

Output

Binary or categorical landslide likelihood (e.g., No Risk / Potential Risk)

Temporal Resolution

Daily (24h, 48h, 72h, 120h, 168h accumulation windows)

Spatial Resolution

Based on input precipitation datasets

Key Assumption

Landslides are primarily triggered when rainfall accumulation exceeds critical thresholds.