Effects of External Digital Elevation Model Inaccuracy on StaMPS-PS Processing: A Case Study in Shenzhen, China

Du, Yanan; Feng, Guangcai; Peng, Xing; Zhu, Jianjun; Ren, Zhengyong

doi:10.3390/rs9111115

Cited by 20 publications

(14 citation statements)

References 46 publications

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“…All the others are estimated after unwrapping and then removed before performing unwrapping again. Even though we are using a 30 m SRTM DEM, it has been shown that the influence of DEM on the deformation rate calculation is small and inversely proportional to the wavelength [15]. In Figure 3(c), we observe that the maximum DEM error is observed outside the area of interest reaching~0.01 rad/m, which corresponds to~12 m of DEM error for Envisat.…”

Section: Geofluidsmentioning

confidence: 89%

Production-Induced Subsidence at the Los Humeros Geothermal Field Inferred from PS-InSAR

et al. 2019

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Surface deformation due to fluid extraction can be detected by satellite-based geodetic sensors, providing important insights on subsurface geomechanical properties. In this study, we use Differential Interferometric Synthetic Aperture Radar (DInSAR) observations to measure ground deformation due to fluid extraction at the Los Humeros Geothermal Field (Puebla, Mexico). Our main goal is to reveal the pressure distribution in the reservoir and to identify reservoir compartmentalization, which can be important aspects for optimizing the production of the field. The result of the PS-InSAR (Persistent Scatterer by Synthetic Aperture Radar Interferometry) analysis shows that the subsidence at the LHGF was up to 8 mm/year between April 2003 and March 2007, which is small relative to the produced volume of 5×106 m3/year. The subsidence pattern indicates that the geothermal field is controlled by sealing faults separating the reservoir into several blocks. To assess if this is the case, we relate surface movements with volume changes in the reservoir through analytical solutions for different types of nuclei of strain. We constrain our models with the movements of the PS points as target observations. Our models imply small volume changes in the reservoir, and the different nuclei of strain solutions differ only slightly. These findings suggest that the pressure within the reservoir is well supported and that reservoir recharge is taking place.

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Section: Geofluidsmentioning

confidence: 89%

Production-Induced Subsidence at the Los Humeros Geothermal Field Inferred from PS-InSAR

et al. 2019

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“…We could improve the PS density even further by using a higher-resolution DEM, if available. Du et al 51 , for instance, have shown that using a 5 m resolution TanDEM-X DEM instead of an SRTM-1arc DEM for X-band SAR data processing using StaMPS has a…”

Section: Discussionmentioning

confidence: 99%

Detecting differential ground displacements of civil structures in fast-subsiding metropolises with interferometric SAR and band-pass filtering

Solano-Rojas

Wdowinski

Cabral‐Cano

et al. 2020

Sci Rep

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Ground displacements due to changes in soil conditions represent a threat to the stability of civil structures in many urban areas, worldwide. In fast-subsiding areas, regional subsidence (wavelength ~ 1,000’s m) can be dominantly high and, consequently, mask other signals at local scales (wavelength ~ 10–100’s m). Still, engineering and construction applications require a comprehensive knowledge of local-scale signals, which can threaten the stability of buildings and infrastructure. Here we present a new technique based on band-pass filters for uncovering local-scale signals hidden by regional subsidence as detected by interferometric SAR measurements. We apply our technique to a velocity field calculated from 21 high-resolution COSMO-SkyMed scenes acquired over Mexico City and obtain components of long (> 478 m), intermediate (42–478 m) and short (< 42 m) spatial wavelengths. Our results reveal that long-wavelength velocities exceed − 400 mm/year, whereas intermediate- and short-wavelength velocities are in the order of ± 15 mm/year. We show that intermediate-wavelength velocities are useful for retrieving signals such as uplift along elevated viaducts of Metro lines 4 and B, as well as differential displacements in Pantitlán station’s pedestrian overpass system and across sharp geotechnical boundaries in the piedmont of Sierra de Santa Catarina—where surface faulting occurs.

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“…Subsidence can also be observed along subways especially when they approaching land reclamation Previous studies of subsidence in Shenzhen mainly use Envisat ASAR images collected between 2006 and 2010 [28][29][30]. Another study used ASAR, ALOS, and TerraSAR-X datasets to investigate the effects of DEM on PS-InSAR in Shenzhen [31]. In this work, apart from using ASAR images acquired between 2004 and 2010, both COSMO-SkyMed images from 2013 to 2016 and Sentinel-1 images from 2015 to 2017 are employed to recover the evolution of Earth surface displacements in Shenzhen.…”

Section: Introductionmentioning

confidence: 99%

Resolving Surface Displacements in Shenzhen of China from Time Series InSAR

Liu

Chen

et al. 2018

Remote Sensing

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Over the past few decades, the coastal city of Shenzhen has been transformed from a small fishing village to a mega city as China’s first Special Economic Zone. The rapid economic development was matched by a sharp increase in the demand for usable land and coastal reclamation has been undertaken to create new land from the sea. However, it has been reported that subsidence occurred in land reclamation area and around subway tunnel area. Subsidence and the additional threat of coastal inundation from sea-level rise highlight the necessity of displacement monitoring in Shenzhen. The time Series InSAR technique is capable of detecting sub-centimeter displacement of the Earth’s surface over large areas. This study uses Envisat, COSMO-SkyMed, and Sentinel-1 datasets to determine the surface movements in Shenzhen from 2004 to 2010 and from 2013 to 2017. Subsidence observed can be attributable to both land reclamation and subway construction. Seasonal displacements are likely to be associated with precipitation. The influence of ocean tidal level changes on seasonal displacement is not strongly evident from the results and requires further investigations. In general, InSAR has proven its ability to provide accurate measurements of ground stability for the city of Shenzhen.

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Effects of External Digital Elevation Model Inaccuracy on StaMPS-PS Processing: A Case Study in Shenzhen, China

Cited by 20 publications

References 46 publications

Production-Induced Subsidence at the Los Humeros Geothermal Field Inferred from PS-InSAR

Production-Induced Subsidence at the Los Humeros Geothermal Field Inferred from PS-InSAR

Detecting differential ground displacements of civil structures in fast-subsiding metropolises with interferometric SAR and band-pass filtering

Resolving Surface Displacements in Shenzhen of China from Time Series InSAR

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