Controlling factors in the interferometric coherence derived from Sentinel-1 images: an example from the R
ıo Chubut Lower Valley, Argentina

SCIVETTI, NICOLAS; BILMES, ANDRÉS; ROSTAGNO, CESAR; KALESS, GABRIEL; MARCOS, PAULO; PRIETO, MARÍA EUGENIA; FALCO, JUAN IGNACIO; PASCUAL, MIGUEL; LUCAS, SEBASTIÁN; BOUZA, PABLO

GEOCARTO INTERNATIONAL

Taylor & Francis

Año: 2022

1010-6049

In this article, controlling factors on radar interferometric coherence(IC) in a region of the Chubut River are analysed, since itsvariations could indicate potential sediment transfer zones.Studied control factors are vegetation cover, development of thedrainage network, rainfall and winds. The results show that themajor control over IC loss is given by rainfalls. A secondary controlis exerted by the drainage networks development; whereasthe limited changes in the vegetation cover and winds regimewould not exert significant control. In addition, a permanent ICloss tendency was recognized in channelized areas whereas temporalIC variations were recognized in non-channelized areas.Finally, as different sectors of the study area under the sameknown conditions (meteorological phenomena, drainage networkand vegetation cover) present different IC variations, the existenceof at least a third control factor —likely linked to the geology ofthe landscape—, is deduced from this research.