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River dike deformation measurement with airborne SAR

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1 Author(s)
Groot, J. ; Radar Syst. & Inf. Extraction Dept., TNO Phys. & Electron. Lab., Hague, Netherlands

Due to extremely high water levels or extremely dry periods, river dikes can deform and eventually burst. The deformation can be measured with repeat-pass synthetic aperture radar (SAR) interferometry. Two flights (5.5-day interval) with an airborne C-band SAR were carried out to verify a particular case. During the second flight, the dike was deliberately deformed. Interferogram analyses showed that the dike deformed by at most 2 mm on this day, in approximate agreement with tachymeter measurements. Corner reflector analysis showed a deformation of about 1 cm during the 5.5-day interval, in good agreement with ground measurements.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:1 ,  Issue: 2 )