Geoinformatics Unit

Preliminary Flood Mapping Following Typhoon Mangkhut in the Philippines on September 15, 2018

September 20, 2018

On September 15, 2018, the Typhoon Mangkhut caused extensive flooding in the northern region of the Philippines. The Geoinformatics Unit from RIKEN Center for Advanced Intelligence Project conducted a preliminary mapping of the flooded areas using satellite remote sensing imagery. The SENTINEL-1 data used in this analysis were downloaded from the Copernicus Open Access Hub website.

To detect the flooded areas, we carried out a change detection analysis using a pre-event SAR data acquired on September 4, 2018, and post-event SAR data obtained one day after the typhoon, on September 16, 2018. The image below shows detected flooded areas (blue segments) in the northern the Philippines.

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Detected flooded areas (blue segments) in the northern the Philippines.