Mudflows in Zimbabwe Eastern Highlands

Sentinel-2 MSI acquired on 23 February 2019 at 07:39:19 UTC
Sentinel-2 MSI acquired on 22 March 2019 at 07:26:19 UTC
Sentinel-2 MSI acquired on 25 March 2019 at 07:36:09 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Emergency, natural disaster, land, precipitations, landslide, mudflow, flooding, erosion, cyclone, Mozambique, Zimbabwe.
Fig. 1 - S2 (22 & 25.03.2019) - 4,3,2 natural colour - Caused by Cyclone Idai, large sediment plumes discharge into the Canal of Mozambique
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Fig. 2 - S2 (25.03.2019) - 4,3,2 colour composite - Upstream, sediments brought by mudflows remained after the flood.
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Fig. 3 - S2 (25.03.2019) - ndi(band 11 after,before), ndi(band 8 after,before), ndi(band 2 after,before) colour composite.
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The 11,8,2 colour composite highlights the bare soil, vegetation and water cover. By computing the Normalised Difference Index of these 3 bands before and after Cyclone Idai, the change become more apparent: rivers grew and bare soil replaced vegetation due to erosion and mud deposits. In particular, landslides happened in numerous gullies, showing in pink and purple.
Fig. 4 - S2 (25.03.2019) - View of Chimanimani section of Zimbabwe Eastern Highlands across the frontier with Mozambique.
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Fig. 5 - S2 (25.03.2019) - 11,8,2 colour composite - Zoom in on eroded areas north of Monte Binga.
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The views expressed herein can in no way be taken to reflect the official opinion of the European Space Agency or the European Union.
Contains modified Copernicus Sentinel data 2024, processed by VisioTerra.
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