24 July 2007 (From AFP) - Thousands of homes across central England remained without running water and electricity as the worst floods in British memory lapped at the historic university city of Oxford. The areas hit hardest by flooding, which began with exceptionally heavy rains last Friday, were Worcestershire, Warwickshire, Herefordshire, Gloucestershire, Lincolnshire, Oxfordshire and Berkshire.
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Event Timeline |
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23 July 2007 |
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The ASAR instrument in wide swath mode shows a large flooded area |
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23 July 2007 - Comparison |
Comparison between the previous image and an archive reference image
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Technical Information |
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Product: |
ASA_WSM_1P |
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Satellite: |
Envisat |
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Instrument: |
Advanced Synthetic Aperture Radar (ASAR) |
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Instruments features: |
Comparison between the crisis image:
An archive reference image obtained by averaging the following products
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ASAR WSM 20060109
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ASAR WSM 20060424
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ASAR WSM 20060807
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ASAR WSM 20060911
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ASAR WSM 20070305
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Bands combination: |
Colors are assigned as follows:
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Red denotes a signal increase between crisis data and archive;
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Blue denotes a signal drop between crisis data and archive;
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Surface without any change (no damage) is black and white.
Interpretation
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Blue is potentially flooded surface;
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Red may indicate flooding as well, for example in presence of wind, if the signal has not been changed by other factors (agricultural, etc.)
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ASAR instrument in medium mode resolution
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26 July 2007 - Comparison |
Comparison between the previous image and an archive reference image
Products were ortho-rectified
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Technical Information |
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Product: |
ASA_IMM_1P |
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Satellite: |
Envisat |
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Instrument: |
Advanced Synthetic Aperture Radar (ASAR) |
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Instruments features: |
Comparison between the crisis image:
An archive reference image obtained by
averaging the following products
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ASAR IMM 20070201
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ASAR IMM 20060706
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ASAR IMM 20060601
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Bands combination: |
Colors are assigned as follows:
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Red denotes a signal increase between crisis data and archive;
-
Blue denotes a signal drop between crisis data and archive;
-
Surface without any change (no damage) is black and white.
Interpretation
-
Blue is potentially flooded surface;
-
Red may indicate flooding as well, for example in presence of wind, if the signal has not been changed by other factors (agricultural, etc.)
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Flood - United Kingdom, July 2007
