Large scale change detection techniques dedicated to flood monitoring using ENVISAT wide swath mode data

Capturing variations in inundation with satellite remote sensing in a morphologically complex, large lake

“…Recently, several researchers began investigating changes in the water surface area of Poyang Lake using remote sensing data. For example, Andreoli and Yesou (2007) and Hui et al (2008) examined the variations in lake area during and 1999-2000, respectively. Zhao et al (2011 and Feng et al (2012) also used remote sensing data to examine Poyang Lake's inundation change.…”

Flood Mapping Using InSAR Coherence Map

“…The methodology of radar data processing consists of three steps (Andreoli and Yesou, 2007) (Silveira and Heleno, 2009):…”

“…The first method is developed by NEST (Next ESA, all rights reserved, n.d.) and it is based on the determination of a mask from the color composite images taken before and during the flood. Andreoli and Yesou developed an approach based on the texture filtering (Andreoli and Yesou, 2007) and the detection of the change through the bands ratio (Andreoli and Yesou, 2007). In order to overcome the problem of decorrelation due to the landslide caused by the flood, we used the InSAR coherence as an additional information for texture filtering.…”

“…We then propose an optimization of the more accurate one: the ratio approach (Andreoli and Yesou, 2007). The first method is developed by NEST (Next ESA, all rights reserved, n.d.) and it is based on the determination of a mask from the color composite images taken before and during the flood.…”

“…It is therefore necessary to provide objective and comprehensive information about the area before, during and after this hydrological event (Zhou et al, 2000). To guide support effectively and to provide quantifiable estimates of affected infrastructure and land extent, remote sensing techniques are used to measure and monitor floods (Andreoli and Yesou, 2007). Indeed, remote sensing data integration allows calculation and rapid assessment of water levels, damages and flood risk by area (Zhou et al, 2000), (Andreoli and Yesou, 2007).…”