Satellite-Detected Flood Extents in Mahanoro District, Madagascar, February 2022

A Sentinel-2 satellite image acquired on 24 February 2022 at 10:00 local time detected surface waters in Mahanoro District, Madagascar. Within the analyzed cloud-free zone of about 450 km², approximately 40 km² of land appears flooded, potentially exposing about 3,500 people based on Worldpop population data. This preliminary analysis was produced by the United Nations Satellite Centre (UNOSAT) and has not been validated in the field.

Use Cases

• Assessing flood extent and severity based on satellite-detected surface waters.
• Estimating population exposure to flooding based on Worldpop data and detected waters.
• Planning humanitarian response and resource allocation for the affected district.
• Monitoring environmental changes and disaster impacts in the Atsinanana Region.

Strengths

• Provides a specific spatial analysis covering about 450 km² of cloud-free area.
• Includes a quantified estimate of flooded land (about 40 km²) and potentially exposed population (about 3,500 people).
• Data is sourced from authoritative organizations: UNOSAT and Worldpop.

Limitations

• The analysis is preliminary and has not been validated with ground feedback.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

United Nations Satellite Centre (UNOSAT)

Collection Method

Analysis of satellite imagery (Sentinel-2) combined with Worldpop population data.

Time Range

Observation date: 24 February 2022.

Freshness

Last updated 2026-07-02 10:28:44.201056; freshness should be verified.

Geography

Mahanoro District, Atsinanana Region, Madagascar.