Subsidence in the Dutch Wadden Sea

Ground surface dynamics is one of the processes influencing the future of the Wadden Sea area. Vertical land movement, both subsidence and heave, is a direct contributor to changes in the relative sea level. It is defined as the change of height of the Earth’s surface with respect to a vertical datum. In the Netherlands, the Normaal Amsterdams...

Application of an ensemble smoother with multiple data assimilation to the Bergermeer gas field, using PS-InSAR

Satellite radar data were used to estimate subsurface model parameters of the Bergermeer gas field. Directly using combinations of the line-of-sight measurements in both ascending and descending satellite geometry provided an additional dimension in the data and avoided the introduction of errors during interpolation to horizontal and vertical...

Combining InSAR, levelling and GNSS for the estimation of 3D surface displacements

The three geodetic techniques InSAR, levelling and GNSS are complementary w.r.t. (i) the sensitivity to horizontal and vertical displacement components, (ii) the spatial and temporal resolution of the measurements and (iii) the accuracy of the resulting displacements. We present a strategy to robustly combine the displacement estimates of the...

Estimation of small surface displacements in the Upper Rhine Graben area from a combined analysis of PS-InSAR, levelling and GNSS data

The intra-plate deformation of the Upper Rhine Graben (URG) located in Central Europe is investigated using geodetic measurement techniques. We present a new approach to calculate a combined velocity field from InSAR, levelling and GNSS measurements. As the expected tectonic movements in the URG area are small (less than 1mma−1), the best...

Data assimilation of PS-InSAR movement measurements applied to the bergermeer gas field

This paper reports a study on the use of satellite radar data to constrain the subsurface model parameters of the Bergermeer gas field. Using PSI (Persistent Scatterer InSAR) technology, ascending and descending data were applied in line-of-sight geometry, i.e., without first unravelling the horizontal and vertical components of the signal. The...