Article (Scientific journals)
A Study of Ground Movements in Brussels (Belgium) Monitored by Persistent Scatterer Interferometry over a 25-Year Period
Declercq, Pierre-Yves; Walstra, Jan; Gérard, Pierre et al.
2017In Geosciences, 7 (115), p. 1-17
Peer Reviewed verified by ORBi
 

Files


Full Text
geosciences-07-00115-v2.pdf
Publisher postprint (31.76 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Persistent Scatterer Interferometry; Radar Interferometry; InSAR
Abstract :
[en] The time series of Synthetic Aperture Radar data acquired by four satellite missions (including ERS, Envisat, TerraSAR-X and Sentinel 1) were processed using Persistent Scatterer interferometric synthetic aperture radar (InSAR) techniques. The processed datasets provide a nearly continuous coverage from 1992 to 2017 over the Brussels Region (Belgium) and give evidence of ongoing, slow ground deformations. The results highlight an area of uplift located in the heart of the city, with a cumulative ground displacement of ±4 cm over a 25-year period. The rates of uplift appear to have decreased from 2 to 4 mm/year during the ERS acquisition period (1992–2006) down to 0.5–1 mm/year for the Sentinel 1 data (2014–2017). Uplift of the city centre is attributed to a reduction of groundwater extraction from the deeper (Cenozoic-Paleozoic) aquifers, related to the deindustrialization of the city centre since the 1970s. The groundwater levels attested by piezometers in these aquifers show a clear recharge trend which induced the uplift. Some areas of subsidence in the river valleys such as the Maelbeek can be related to the natural settlement of soft, young alluvial deposits, possibly increased by the load of buildings.
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Declercq, Pierre-Yves;  Institut Royal des Sciences Naturelles de Belgique > Geological Survey of Belgium
Walstra, Jan;  Institut Royal des Sciences Naturelles de Belgique > Geological Survey of Belgium
Gérard, Pierre;  Université Libre de Bruxelles - ULB
Pirard, Eric  ;  Université de Liège - ULiège > Département ArGEnCo > Géoressources minérales & Imagerie géologique
Perissin, Daniele;  Purdue University - Purdue
Meyvis, Bruno;  Institut Royal des Sciences Naturelles de Belgique
Devleeschouwer, Xavier;  Institut Royal des Sciences Naturelles de Belgique
Language :
English
Title :
A Study of Ground Movements in Brussels (Belgium) Monitored by Persistent Scatterer Interferometry over a 25-Year Period
Publication date :
08 November 2017
Journal title :
Geosciences
eISSN :
2076-3263
Publisher :
MDPI
Volume :
7
Issue :
115
Pages :
1-17
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 February 2019

Statistics


Number of views
58 (6 by ULiège)
Number of downloads
91 (0 by ULiège)

Scopus citations®
 
8
Scopus citations®
without self-citations
7
OpenCitations
 
6

Bibliography


Similar publications



Contact ORBi