Satellite-detected mudflow and rockflow extent in Rasuwa and Nuwakot Districts, Bagmati Province, Nepal (26-27 August 2026)

This dataset contains the cumulative satellite-detected mudflow and rockflow extent in Rasuwa and Nuwakot Districts, Bagmati Province, Nepal, following the glacial lake outburst flood (GLOF) and associated flooding of 26 August 2026. UNOSAT derived the extent from Sentinel-2 imagery acquired on 27 August 2026 and PlanetScope imagery acquired on 26 August 2026.

Across the two districts an area of approximately 330 km² was analysed, within which an estimated 30 km² of land appears to be affected by floodwaters, mudflow and rockflow — about 230 km² analysed and 20 km² affected in Rasuwa District, and about 103 km² analysed and 10 km² affected in Nuwakot District. Based on WorldPop spatial demographic data, approximately 6,800 people are estimated to be exposed to or living near the affected areas.

This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

Derived from UNOSAT products 4257 (Rasuwa District) and 4258 (Nuwakot District). GLIDE event number FL20260826NPL.

Data and Resources

  • SHP Mudflow and Rockflow Extent - Rasuwa and Nuwakot (26–27 August 2026) 434

    Cumulative satellite-detected mudflow and rockflow extent derived from Sentinel-2 imagery acquired on 27 August 2026 and PlanetScope imagery acquired on 26 August 2026. A single multipart polygon of...

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  • SHP Analysis Extent - Rasuwa and Nuwakot (26–27 August 2026) 306

    The area analysed by UNOSAT to derive the mudflow and rockflow extent, covering approximately 363 km² across Rasuwa and Nuwakot Districts, Bagmati Province, Nepal. Absence of mapped extent outside...

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  • SHP Area of Interest Frame - Rasuwa and Nuwakot (26–27 August 2026) 104

    Rectangular bounding frame of UNOSAT map products 4257 and 4258, covering approximately 3,091 km². This is the map's area of interest, not the area analysed — for that, see the Analysis Extent...

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Cite this as

DOI:
10.63253/1y26ihdq
UNOSAT (UNOSAT) (2026). Satellite-detected mudflow and rockflow extent in Rasuwa and Nuwakot Districts, Bagmati Province, Nepal (26-27 August 2026) [Data set]. UNESCO IHP-WINS. https://doi.org/10.63253/1y26ihdq
Published: 2026-08-28 | Publisher: UNESCO IHP-WINS

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Medium metadata · 74.5%
Basic information
DOI https://doi.org/10.63253/1y26ihdq
Resource type Spatial data set
Date of creation 2026-08-28
Date of last revision 2026-08-28
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Metadata identifier nepal-satellite-detected-mudflow-and-rockflow-extent-nepal
Metadata language English
Themes (DCAT-AP)
High-value dataset category
ISO 19115 topic category environment
Other identifier
Keyword URIs
Character encoding
Spatial information
INSPIRE identifier
INSPIRE Themes
Geographic identifier
Coordinate Reference System EPSG:4326
Spatial representation Type Vector
Bounding Box
Spatial resolution of the dataset (m) 10
Provenance
Lineage statement

Copernicus Sentinel-2 imagery acquired 27 August 2026 and Planet PlanetScope imagery acquired 26 August 2026. Mudflow and rockflow extent delineated by UNOSAT and released as products 4257 and 4258 on 27 August 2026. Population exposure estimated against WorldPop spatial demographic data. Preliminary — not validated in the field.
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Conformity
Source dataset FL20260826NPL
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Sources
Purpose Disaster Risk Reduction
Process steps
Temporal extent (Start)
Temporal extent (End)
Version notes
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Dataset validity
Responsible Party
Name of the dataset creator (Legacy) UNOSAT
Name of the dataset maintainer Jorgen Van Der Biest
Identifier of the dataset creator (Legacy)
Email of the dataset creator (Legacy) j.van-der-biest@unesco.org
Website of the dataset creator (Legacy)
Identifier of the dataset maintainer
Email of the dataset maintainer j.van-der-biest@unesco.org
Website of the dataset maintainer