I’m in the learning phase with SAR data trying to use Sentinel 1 to detect flood in a location in the Amazon region.
I’m having trouble detecting flooded areas in places with vegetation. Any suggestions /step by step can I use to improve flood mapping in vegetated areas?
Thanks for your help.
what approach did you select for the detection of flooded areas? Threshold-based identification or supervised classification?
Unlike open areas, flooded vegetation is often characterized by an increase of backscatter (instead of a decrease), because if higher occurrence of double-bounce effects
Please check this review article, it contains nice explanations on the nature of flooded vegetation: SAR-based detection of flooded vegetation – a review of characteristics and approaches .
Also, the discussions in these topics might be helpful:
yes, this works well for open water bodies. Flooded vegetation or urban flooding is more complicated. Maybe the approach in this tutorial is more suitable in your case?
Flood Mapping Tutorial