Multi-Sensor Satellite-Based Retrospective Early-Warning Assessment of the 26 August 2026 Flood Event in the Langtang Region of Nepal

Identity and coverage

Catalogue identifier: res-1ba3111e-566d-4475-bdd0-9c1f5db05d23
Persistent identifier: 10.31223/x5kb85
Resource version: Version 1
Publication date: 3 September 2026
Last updated: 3 September 2026
Metadata reviewed: 4 September 2026
Language: English
Geographic coverage: Langtang region and glacierized source area in Rasuwa District, central Nepal.
Bounding box (WGS 84): Not stated
Temporal coverage: 1 January 2020 to 26 August 2026; Multi Year Baseline And Pre Event Analysis
Themes: Early Warning, Remote Sensing, Precipitation, Cryosphere, Surface Water, Multi-Sensor Analysis

Production method: Applies a Google Earth Engine workflow to ERA5-Land precipitation, Sentinel-1, Sentinel-2, MODIS snow cover, GLIMS glaciers, and JRC surface water, then calculates an exploratory retrospective early-warning index.
Provenance: Authored by Avideh Asadollahi and deposited in EarthArXiv; the repository record, Crossref metadata, and current PDF establish the DOI, version, dates, authorship, and licence.
Validation: Not Peer Reviewed
Uncertainty: The heuristic index was not calibrated or independently validated, satellite observations were discontinuous, and the observed changes cannot by themselves establish the event mechanism or operational predictability.
Limitations: The design is retrospective; acquisition gaps, cloud and snow effects, sensor-resolution differences, and the 1–21 August cumulative-rainfall window limit interpretation. No public code-repository link was provided.

Asset bounding box not stated. Parent resource coverage: Langtang region and glacierized source area in Rasuwa District, central Nepal.

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