Long-term ground deformation patterns of Bucharest using multi-temporal InSAR and multivariate dynamic analyses: a possible transpressional system?

Armaş, Iuliana; Mendes, Diana; Popa, Răzvan‐Gabriel; Gheorghe, Mihaela; Marin, Iuliana

doi:10.1038/srep43762

Cited by 29 publications

(25 citation statements)

References 37 publications

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“…A reduction of the use of groundwater in Bucharest followed, decreasing to 600 l/s in 2012 [41]. On a site with known recent subsidence, the used monitoring methods started with PSI and were completed in several studies by SBAS, and validated by precise leveling and GNSS measurements [42], [43], [44]. After this period of time, different patterns were registered at land surface, including continuation of subsidence, stabilization or uplift [43], [44].…”

Section: Bucharest Romaniamentioning

confidence: 99%

Chronological reflection on monitoring urban areas subsidence due to groundwater extraction

Radutu

Gogu

2019

E3S Web Conf.

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Land subsidence affects urban areas worldwide. Sometimes it could be driven by intensive groundwater withdrawal to assure different urban needs and functionalities. Some of these urban areas have a long history of subsidence that covers almost a century. The aim of this paper is to present the evolution of several urban areas affected by land subsidence, the methods used to monitor vertical displacements along the decades in relationship to the groundwater extraction associated to the urban expansion, and the mitigation techniques used for countering the effects of intensive groundwater withdrawal. Even the originally applied subsidence monitoring methods (such as geometric levelling) are still very sensitive, in terms of time consuming, covered area, and financial effort, these methods might be complemented by new methods based on Synthetic Aperture Radar Interferometry (InSAR). InSAR methods show also a significant progress during the last decades when considering the subsidence sensed order of magnitude.

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Section: Bucharest Romaniamentioning

confidence: 99%

Chronological reflection on monitoring urban areas subsidence due to groundwater extraction

Radutu

Gogu

2019

E3S Web Conf.

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“…In this paper we will focus only on the expected (or normal) pattern with subsidence until 1999 followed by uplift after 2003, and the pattern characterized by continuous uplift. The third pattern, a subsident one, was detailed in previous research and will not be developed in this paper [5] [6].…”

Section: Tested Areas: Industrial Parksmentioning

confidence: 99%

“…The analysis of the industrial areas described in a former study [5] represented a basis for a more detailed investigation in a paper published in Scientific Reports [6]. Different industrial parks in Bucharest represent suitable test sites for identifying long-term dynamic patterns through comparative analysis with their neighboring areas.…”

Section: Tested Areas: Industrial Parksmentioning

confidence: 99%

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Identifying ground displacement trends in Bucharest using InSAR

Armaş¹,

Mendes²,

Gheorghe³

et al. 2017

Proceedings of the 33rd Romanian Geomorphology Symposium

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Abstract-Some of the most popular multi-temporal interferometric techniques used in monitoring surface movements have been applied for capturing the spatial evolution patterns of Bucharest. Three sets of C and X-band single polarized SAR images (Envisat, ERS and TSX) were processed using the PS (Persistent Scatterers) and SBAS (Small BAseline Subset) techniques. The processing results consisted of deformation maps offering an image of the line of sight displacement rates in the past. In both PS and SBAS cases, displacement rates values are of the orders of millimetres. The analysis of possible trends is focused on relevant areas with a potentially interesting historical evolution, such as former clay pits, landfill excavation sites and industrial platforms. The InSAR techniques made it possible for the first time to investigate movements over large urban areas in combination with results derived from classical methodologies (diachronic cartography, geology, geomorphology) and thorough statistical analysis. The analyses lead to a new hypothesis regarding the geological processes that affect the surface evolution patterns in Bucharest.

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“…The idea has attracted attention since its introduction. PS-DINSAR can obtain high coherent points by natural and artificial objects with surface scattering properties and observe surface deformation with properties of high precision and large scale in a long time [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optimized Method for Selecting Common Master Image in PS-DINSAR

Liu¹,

Cao²,

Wang³

et al. 2018

JESTR

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The differential synthetic aperture radar interferometry technique of permanent scatterers (PS-DINSAR) is an important method in the phase analysis of synthetic aperture radar data. Selection of common master image in PS-DINSAR widely influences the data processing results. Most of existing selection methods of common master image are based the statistical characteristics on the baseline of the interferogram and thus cannot ensure best selected results. A method based on fixed weights of observed values in the surveying adjustment was used in this study to extract an optimum image. The temporal baselines, effective spatial baselines, and Doppler centroid frequency difference of image pairs were incorporated in this technique. The sum of normalized weights model was utilized based on integrated correlation coefficient algorithm and minimum sum of three baseline algorithm to obtain optimal common master image. Then, the procedure of selecting common master images based on the idea of maximum sum of normalized weights was introduced and used to test the selection of common master image by using 19 images of ERS-1/2. Result shows that, in comparison with data generated separately by integrated correlation coefficient algorithm and minimum sum of three baseline algorithm, the outcome produced by maximum sum of normalized weights model in this study exhibits considerably better statistical property in temporal baselines, effective spatial baselines, and Doppler centroid frequency difference of image pairs. Moreover, the interferograms show that the maximum, average, and standard deviation values are less than those of others in temporal baselines, effective spatial baselines, and Doppler centroid frequency difference. Therefore, the selected common master is robust and stable. This study provides an effective method for the optimization of common master image and presents certain guiding significance for selecting common master image.

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Long-term ground deformation patterns of Bucharest using multi-temporal InSAR and multivariate dynamic analyses: a possible transpressional system?

Cited by 29 publications

References 37 publications

Chronological reflection on monitoring urban areas subsidence due to groundwater extraction

Chronological reflection on monitoring urban areas subsidence due to groundwater extraction

Identifying ground displacement trends in Bucharest using InSAR

Optimized Method for Selecting Common Master Image in PS-DINSAR

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