Skip to content. | Skip to navigation

Personal tools

You are here: Home / Library / RBINS Staff Publications 2021 / Land Subsidence Observed in the Merchtem Area (Flanders) – 30 Years of SAR Data Associated to Groundwater Withdrawal?

Atefe Choopani, Pierre-Yves Declercq, Alain Dassargues and Xavier Devleeschouwer (2021)

Land Subsidence Observed in the Merchtem Area (Flanders) – 30 Years of SAR Data Associated to Groundwater Withdrawal?

In: 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, ed. by IEEE Xplore.

A land subsidence affecting several towns at the joining limits of the Belgian Provinces of East Flanders, Antwerp and Flemish Brabant is followed during the last three decades. ERS 1–2, ENVISAT, TerraSAR-X and Sentinel-1A satellites SAR scenes were processed from 1992 till October 2020 to map the land subsidence evolution. The subsidence corresponds to a surface area of 220 km 2 during the ERS 1/2 time interval distributed over three distinct subsidence bowls. During the ENVISAT and TerraSAR-X time interval, only one residual subsidence bowl was mapped affecting a surface area of about 70 km 2 . Several towns (Londerzeel and Steenhuffel) remained in the center of the subsidence bowl. The annual average negative velocity values range between −5.99 and −0.5 mm/year. During the Sentinel-1A period, the subsidence bowl has lost half of its surface reaching 36 km 2 . The LOS velocity values have also decreased during the period 2016–2020.
Proceedings, Peer Review, Abstract of an Oral Presentation or a Poster

Document Actions