Water Change Detection in Natural Dam caused by Earthquake using Π-SAR fully Polarimetric Data

Inhalt:
This paper presents water level change in natural disaster dam, unexpectedly caused by a great earthquake, by Π-SAR observation. Π-SAR is a fully polarimetric SAR system operative both in the X- and L-band with high resolution of 1.5 by 1.5 m (X) and 3 by 3 m (L). A modified four-component decomposition of scattering power is applied to retrieve the water surface change in former Yamakoshi village, Niigata, Japan. It is shown that water volume change can be detected effectively by comparing the time series data of volume scattering power image.