Satellite images reveal extent of damage


Before and after satellite images of Queensland’s Scenic Rim region have laid bare the record-breaking devastation caused by rainfall in the area.

Mapping firm Soar, based in Perth, used images of the northern Scenic Rim region from the European Space Agency’s Sentinel satellites which show with shocking clarity how severe flooding has occurred around Warrill Creek between Harrisville and Radford in late February.

Satellite images of the floods were difficult to capture due to heavy cloud cover over New South Wales and Queensland over the past 10 days; the Scenic Rim image was captured during a rare area of ​​clarity.

The maps also use different spectral bands captured by Sentinel satellites to show the region’s water stress and vegetation health, before and after the flood.

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Soar mapping content coordinator Diana Rodzi said the water stress map was normally used to detect moisture levels in vegetation, but was a good example of how much water was flowing In the region.

“The [moisture stress] The index is generally used to determine if crops are being irrigated appropriately. In this case, since there was an extreme weather event, there was an excess of water,” she said.

“This excess water can be considered ‘over-irrigation’. In the image after the flood, the deeper blue areas show excess water, which indicates where there is flood water.

Ms Rodzi said the vegetation index map shows how healthy the vegetation is, with water showing up as black or white spots.

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