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Satellite detected water extent over Sanamxay District, Attapeu Province, Lao People Democratic Republic

The Centre for Humanitarian Data · 2018 Full Details

Full Details

Title
Satellite detected water extent over Sanamxay District, Attapeu Province, Lao People Democratic Republic
Description
This map illustrates the satellite-detected surface waters extent in Sanamxay district, Attapeu province, as observed from the Radarsat-2 radar image acquired on 24 July 2018. The previous day, the Xe-Namnoy dam collapsed, inducing flash floods along the Vang Ngao river and affecting several villages located 50 km downstream. Within the analysed area 14,692 ha of surface waters were detected after the heavy rains that happened on 22 July and as well the collapse of the dam. Several villages and surrounding agricultural fields seems to be inundated. The villages of Ban Hinlat, Ban Thaseangchan, Ban Mai and Ban Samong-tai seems to be the most affected ones. It is likely that flood waters have been systematically underestimated along highly vegetated areas, along the main riverbanks and within built-up urban areas because of the special characteristics of the used satellite data. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.
Creator
UNOSAT
Publisher
The Centre for Humanitarian Data
Temporal Coverage
2018-07-26
Date Issued
2018-08-09
License
http://www.opendefinition.org/licenses/cc-by-sa
Access Rights
Public
Date Added
August 23, 2025
Provenance Statement
The metadata for this resource was last retrieved from Humanitarian Data Exchange on 2025-08-23.

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Cite and Reference

  • Citation
    UNOSAT (2018). Satellite detected water extent over Sanamxay District, Attapeu Province, Lao People Democratic Republic. The Centre for Humanitarian Data. https://data.humdata.org/dataset/0c8d2a84-abb3-4058-9d4d-8d4e57b552ab (dataset)
  • BTAA Geoportal Link

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