Land motion in the urban area of Nottingham observed by ENVISAT-1

Leighton, Jon; Sowter, Andrew; Tragheim, D. G.; Bingley, R. M.; Teferle, Felix Norman

doi:10.1080/01431161.2012.714507

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…Similarly, changes in the pore water pressure due to groundwater abstraction for domestic use, or water levels control during engineering and mining works, can alter local conditions in the effective stress and result in ground surface motions. Surface evidence of these processes in the UK was recently investigated by processing satellite synthetic aperture radar (SAR) imagery and interpreting their derived ground motion data together with a range of geological layers and information (e.g., BANTON et al 2013;BATESON et al 2014;CULSHAW et al 2006;LEIGHTON et al 2013;SOWTER et al 2013). A feasibility study with nationwide coverage has also been carried out by CIGNA et al (2014) to assess the potential of ERS-1/2 and ENVISAT C-band SAR-based imaging of the landmass of Great Britain, by analysing archive data availability, simulating geometric distortions and modelling land cover control on the success of SAR, interferometric SAR (InSAR) and persistent scatterer interferometry (PSI) applications.…”

Section: Introductionmentioning

confidence: 99%

Natural and Anthropogenic Geohazards in Greater London Observed from Geological and ERS-1/2 and ENVISAT Persistent Scatterers Ground Motion Data: Results from the EC FP7-SPACE PanGeo Project

Cigna

Jordan

Bateson

et al. 2014

Pure Appl. Geophys.

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Abstract-We combine geological data and ground motion estimates from satellite ERS-1/2 and ENVISAT persistent scatterer interferometry (PSI) to delineate areas of observed natural and anthropogenic geohazards in the administrative area of Greater London (United Kingdom). This analysis was performed within the framework of the EC FP7-SPACE PanGeo project, and by conforming to the interpretation and geohazard mapping methodology extensively described in the Production Manual (cf. http://www. pangeoproject.eu). We discuss the results of the generation of the PanGeo digital geohazard mapping product for Greater London, and analyse the potential of PSI, geological data and the PanGeo methodology to identify areas of observed geohazards. Based on the analysis of PSI ground motion data sets for the years 1992-2000 and 2002-2010 and geology field campaigns, we identify 25 geohazard polygons, covering a total of *650 km 2 . These include not only natural processes such as compaction of deposits on the River Thames flood plain and slope instability, but also anthropogenic instability due to groundwater management and changes in the Chalk aquifer, recent engineering works such as those for the Jubilee Line Extension project and electricity tunnelling in proximity to the River Thames, and the presence of made ground. In many instances, natural and anthropogenic observed geohazards overlap, therefore indicating interaction of different processes over the same areas. In terms of ground area covered, the dominant geohazard is anthropogenic land subsidence caused by groundwater abstraction for a total of *300 km 2 , followed by natural compression of River Thames sediments over *105 km 2 . Observed ground motions along the satellite line-of-sight are as high as ?29.5 and -25.3 mm/year, and indicate a combination of land surface processes comprising ground subsidence and uplift, as well as downslope movements. Across the areas of observed geohazards, urban land cover types from the Copernicus (formerly GMES) EEA European Urban Atlas, e.g., continuous and discontinuous urban fabric and industrial units, show the highest average velocities away from the satellite sensor, and the smallest standard deviations (*0.7-1.0 mm/year). More rural land cover types such as agricultural, semi-natural and green areas reveal the highest spatial variability (up to *4.4 mm/year), thus suggesting greater heterogeneity of observed motion rates within these land cover types. Areas of observed motion in the PSI data for which a geological interpretation cannot be found with sufficient degree of certainty are also identified, and their possible causes discussed. Although present in Greater London, some geohazard types such as shrink-swell clays and ground dissolution are not highlighted by the interpretation of PSI annual motion rates. Reasons for absence of evidence of the latter in the PSI data are discussed, together with difficulties related to the identification of good radar scatterers in landsliding areas.

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Section: Introductionmentioning

confidence: 99%

Natural and Anthropogenic Geohazards in Greater London Observed from Geological and ERS-1/2 and ENVISAT Persistent Scatterers Ground Motion Data: Results from the EC FP7-SPACE PanGeo Project

Cigna

Jordan

Bateson

et al. 2014

Pure Appl. Geophys.

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“…The exciting developments in urban remote sensing referred to above are well illustrated in this issue of the journal, with articles at the cutting edge of urban LULC mapping, air and climate monitoring, building modelling, and environmental analysis. The range of remote-sensing systems used in the studies varies from airborne multispectral cameras (Li and Shao 2013;Hu and Wang 2013), airborne multispectral scanners (Thomas, Briottet, and Santer 2013), satellite-borne optical (Du et al 2013;Kiran and Joshi 2013;Liang, Weng, and Tong 2013; and thermal (Holderness et al 2013; scanners, InSAR (Leighton et al 2013), airborne Lidar (Hu and Wang 2013;Teo and Shih 2013), doppler Lidar (Chan and Li 2013), and sunphotometers , and some of the studies have used multiple sensors (Tack et al 2013) and sensor types (Hu and Wang 2013).…”

Section: Sustainable Urbanizationmentioning

confidence: 99%

“…Leighton et al (2013) present a study of land motion in the urban area of Nottingham, UK, over the period from November 2002 to February 2009 using persistent scatterer InSAR (PSI). The atmospheric effect on the PSI measurements, which is corrected with zenith wet delays (ZWD) determined with precise point positioning (PPP) GPS observations, is found to be effective.…”

Section: Sustainable Urbanizationmentioning

confidence: 99%

Sustainable urbanization

Nichol

King

Ding

2012

International Journal of Remote Sensing

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“…But it has also been widely used as a method for monitoring slower surface movements on a longer time scale, such as inter-seismic deformation or land subsidence due to groundwater and oil withdrawal or mining activities. It is also often combined with CGPS observations or levelling techniques as an independent data source (e.g., Hoffmann et al 2001; Tosi et al 2002; Carbognin et al 2004; Wang et al 2008; Chen et al 2010; Fan et al 2011; Osmanoğlu et al 2011; Aobpaet et al 2013; Leighton et al 2013). DInSAR has proved useful for giving indirect information about GIA in areas where the ice sheet is still present.…”

Section: Geodetic Measurement Techniques and Gia Modellingmentioning

confidence: 99%

State-of-the-art in studies of glacial isostatic adjustment for the British Isles: a literature review

Stockamp

Bishop

et al. 2015

Earth and Environmental Science Transactions of the Royal Socie

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Understanding the effects of glacial isostatic adjustment (GIA) of the British Isles is essential for the assessment of past and future sea-level trends. GIA has been extensively examined in the literature, employing different research methods and observational data types. Geological evidence from palaeo-shorelines and undisturbed sedimentary deposits has been used to reconstruct long-term relative sea-level change since the Last Glacial Maximum. This information derived from sea-level index points has been employed to inform empirical isobase models of the uplift in Scotland using trend surface and Gaussian trend surface analysis, as well as to calibrate more theory-driven GIA models that rely on Earth mantle rheology and ice sheet history. Furthermore, current short-term rates of GIA-induced crustal motion during the past few decades have been measured using different geodetic techniques, mainly continuous GPS (CGPS) and absolute gravimetry (AG). AG-measurements are generally employed to increase the accuracy of the CGPS estimates. Synthetic aperture radar interferometry (InSAR) looks promising as a relatively new technique to measure crustal uplift in the northern parts of Great Britain, where the GIA-induced vertical land deformation has its highest rate. This literature review provides an in-depth comparison and discussion of the development of these different research approaches.

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Land motion in the urban area of Nottingham observed by ENVISAT-1

Cited by 9 publications

References 24 publications

Natural and Anthropogenic Geohazards in Greater London Observed from Geological and ERS-1/2 and ENVISAT Persistent Scatterers Ground Motion Data: Results from the EC FP7-SPACE PanGeo Project

Natural and Anthropogenic Geohazards in Greater London Observed from Geological and ERS-1/2 and ENVISAT Persistent Scatterers Ground Motion Data: Results from the EC FP7-SPACE PanGeo Project

Sustainable urbanization

State-of-the-art in studies of glacial isostatic adjustment for the British Isles: a literature review

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