{"data":{"id":"10.5281/zenodo.22135832","type":"dois","attributes":{"doi":"10.5281/zenodo.22135832","prefix":"10.5281","suffix":"zenodo.22135832","identifiers":[{"identifier":"oai:zenodo.org:22135832","identifierType":"oai"}],"alternateIdentifiers":[{"alternateIdentifierType":"oai","alternateIdentifier":"oai:zenodo.org:22135832"}],"creators":[{"name":"Keystone GIS","nameType":"Personal","familyName":"Keystone GIS","affiliation":["Keystone GIS Northern Virginia GIS Research Program"],"nameIdentifiers":[]}],"titles":[{"title":"Bhote Koshi Flash Flood Impact and Exposure Atlas, Nepal, 26 August 2026"}],"publisher":"Zenodo","container":{},"publicationYear":2026,"subjects":[{"subject":"flash flood"},{"subject":"landslide"},{"subject":"Nepal"},{"subject":"Tibet"},{"subject":"Bhote Koshi"},{"subject":"Trishuli"},{"subject":"Rasuwa"},{"subject":"Nuwakot"},{"subject":"disaster impact"},{"subject":"damage assessment"},{"subject":"height above nearest drainage"},{"subject":"population exposure"},{"subject":"hydropower"},{"subject":"Copernicus DEM"},{"subject":"WorldPop"},{"subject":"GIS"},{"subject":"geospatial"},{"subject":"Northern Virginia"},{"subject":"Virginia"},{"subject":"open data"}],"contributors":[],"dates":[{"date":"2026-08-28","dateType":"Issued"}],"language":null,"types":{"ris":"DATA","bibtex":"misc","citeproc":"dataset","schemaOrg":"Dataset","resourceType":"","resourceTypeGeneral":"Dataset"},"relatedIdentifiers":[{"relationType":"IsSupplementTo","relatedIdentifier":"https://keystonegis.com/disasters/nepal-bhotekoshi-flood-20260826.html","relatedIdentifierType":"URL"},{"relationType":"IsVersionOf","relatedIdentifier":"10.5281/zenodo.22118798","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":[],"formats":[],"version":"v4","rightsList":[{"rights":"Creative Commons Attribution 4.0 International","rightsUri":"https://creativecommons.org/licenses/by/4.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-4.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"Impact and exposure atlas for the flash flood that swept the Bhote Koshi / Trishuli corridor of Rasuwa and Nuwakot districts, Nepal, on 26 August 2026, triggered by a glacier collapse north of Langtang Lirung (USGS us7000tbwb, event-type landslide, Ms 5.2). Version 4 (28 August 2026) adds the first OBSERVED extent for this event. Copernicus EMS Rapid Mapping activation EMSR927 released grading products for AOI01 Syapru Besi and AOI02 Timure, photo-interpreted from WorldView-3 and Legion imagery acquired 27 August 2026 05:05 UTC: two observed-event polygons (111.078 ha and 125.875 ha), 864 graded buildings, 44 graded road segments and 6 graded bridges. EMS types the mapped surface as \"6-Mass Movement / Landslide\" - the scoured and debris-covered ground the flow left behind, not a standing water extent. v4 also ships the first independent validation of this atlas's height-above-channel envelope against those observed data: 92.8 percent of the 236.95 ha EMS observed event area, 96.8 percent of the 695 buildings graded Destroyed, all 6 bridges graded Destroyed and 96.3 percent of the 15.67 km of road graded Destroyed fall inside the 80 m band, against only 11.6 percent of the 3.87 km graded \"No visible damage\". The upstream barrier lake pool polygons added in v3 remain modelled, not observed - EMS did not map the impoundment, and no satellite pass over the lake has become available since the fully clouded Sentinel-2 acquisition of 27 August 05:10 UTC. The commercial VHR imagery underlying the EMS products is not redistributed here; only the openly licensed CEMS vector layers are included. Version 2 added the barrier lake point and the upstream drainage through Gyirong County and raised the glacier-collapse record to high location confidence. The exposure analysis - a Copernicus GLO-30 height-above-channel envelope at 10, 20, 40 and 80 m with WorldPop population by band, district and municipality, plus exposed settlements, road length, bridge crossings and hydropower assets - is unchanged since v1. Casualty counts are deliberately not carried in the data; they are reported on the dataset page with attribution and 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