Datasets > Thailand > 2020-2024

Satellite detected water extents in Central and Western parts, Thailand as of 21 October 2021

The Centre for Humanitarian Data · 2021 Full Details

Full Details

Title
Satellite detected water extents in Central and Western parts, Thailand as of 21 October 2021
Description
**UNOSAT code: FL20210928THA** This map illustrates satellite-detected surface waters in Central and Western parts of Thailand as observed from a Sentinel-1 image acquired on 21 October 2021 at 06:09 local time. Within the analyzed area of about 90,000 km2 , about 3,200 km2 of lands appear to be flooded. The water extent appears to have receded of about 70 km2 since 10 October 202. Based on Worldpop population data and the detected surface waters in the analyzed area, the potentially exposed population is 370,000 people mainly located in province of Phra Nakhon Si Ayutthaya with ~ 99,000 people, Suphan Buri with ~ 88,000 people, and Nakhon Sawan with ~ 47,000 people, This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to United Nations Satellite Centre (UNOSAT). Important note: Flood analysis from radar images may underestimate the presence of standing waters in built-up areas and densely vegetated areas due to backscattering properties of the radar signal.
Creator
UN Operational Satellite Applications Programme (UNOSAT)
Publisher
The Centre for Humanitarian Data
Temporal Coverage
2021-10-22
Date Issued
2022-02-18
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.

Resource Class

Theme

Place

Local Collection

Location

Links

Cite and Reference

  • Citation
    UN Operational Satellite Applications Programme (UNOSAT) (2022). Satellite detected water extents in Central and Western parts, Thailand as of 21 October 2021. The Centre for Humanitarian Data. https://data.humdata.org/dataset/4869b0a1-80cd-4689-8f90-a7106d0cd6fa (dataset)
  • BTAA Geoportal Link

View more items like this one...

Satellite detected water extents in Northeastern part of Thailand as of 17 October 2021

2021

Satellite detected water extents in Nakhon Ratchasima province, Thailand as of 6 Octobe...

2021

Satellite detected waters in the Central region of Thailand as of 3 October 2021

2021

Satellite detected water extents in upper central region, Thailand as of 2 October 2021

2021

Satellite detected water extents in Northeastern part of Thailand

2021

Satellite detected water extents in Northeastern part of Thailand as of 10 October 2021

2021

Satellite detected water extents over Chaiyaphum and Nakhon Ratchasima Provinces, Thail...

2022

Satellite detected waters in Ha Tinh and Nghe An Provinces of Viet Nam as of 21 October...

2020

Satellite detected waters in Quang Ngai Province of Viet Nam as of 30 October 2020

2020

Satellite detected waters in Quang Tri Province of Viet Nam as of 22 October 2020

2020