Monitoring the Vertical Land Motion of Tide Gauges and Its Impact on Relative Sea Level Changes in Korean Peninsula Using Sequential SBAS-InSAR Time-Series Analysis

Vadivel, S.; Kim, Duk‐jin; Jung, Jungkyo; Cho, Yang‐Ki; Han, Ki-Jong

doi:10.3390/rs13010018

Cited by 11 publications

(5 citation statements)

References 43 publications

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“…year time frame. Recently, the literature has shown a resolution of 290 interferograms over 5 years [18].…”

Section: Methodsmentioning

confidence: 99%

“…Both for the joint elaboration of the results and their mutual verification, it is necessary to provide information on the accuracy of the obtained vertical movements of the earth's crust from individual measurement techniques. This fact is often neglected in the literature, which may lead to misinterpretation of the final results [18]. To obtain the accuracy at the assumed level for each of the techniques, it is sought to determine the optimal conditions that should be met by the time series.…”

Section: Introductionmentioning

confidence: 99%

“…Typically, these are series with low time resolution (one interferogram per year, quarter or month) in a 1-, 2-or 3-year time frame. Recently, the literature has shown a resolution of 290 interferograms over 5 years [18].…”

Section: Introductionmentioning

confidence: 99%

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An Analysis of Vertical Crustal Movements along the European Coast from Satellite Altimetry, Tide Gauge, GNSS and Radar Interferometry

et al. 2021

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The main aim of the article was to analyse the actual accuracy of determining the vertical movements of the Earth’s crust (VMEC) based on time series made of four measurement techniques: satellite altimetry (SA), tide gauges (TG), fixed GNSS stations and radar interferometry. A relatively new issue is the use of the persistent scatterer InSAR (PSInSAR) time series to determine VMEC. To compare the PSInSAR results with GNSS, an innovative procedure was developed: the workflow of determining the value of VMEC velocities in GNSS stations based on InSAR data. In our article, we have compiled 110 interferograms for ascending satellites and 111 interferograms for descending satellites along the European coast for each of the selected 27 GNSS stations, which is over 5000 interferograms. This allowed us to create time series of unprecedented time, very similar to the time resolution of time series from GNSS stations. As a result, we found that the obtained accuracies of the VMEC determined from the PSInSAR are similar to those obtained from the GNSS time series. We have shown that the VMEC around GNSS stations determined by other techniques are not the same.

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“…year time frame. Recently, the literature has shown a resolution of 290 interferograms over 5 years [18].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Analysis of Vertical Crustal Movements along the European Coast from Satellite Altimetry, Tide Gauge, GNSS and Radar Interferometry

et al. 2021

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“…When subsidence occurs on the shore, the sea level increases in relation to the land. This phenomenon, known as relative Sea Level Rise (SLR) [13], is widely observed with InSAR, e.g., in the Mekong Delta, Vietnam [14], in California [15], on the northern coast of the Gulf of Mexico [16], in the Korean peninsula [17] and in Tianjin, northern China [18]. islands of the Gulf, such as Kish island [20] and Qaruh island [21], are also located over or near hydrocarbon reservoirs.…”

Section: Rfimentioning

confidence: 99%

Nationwide Subsidence in Bahrain Island: Drivers and Implications for Relative Sea-Level Rise

Normand

Heggy

Castellazzi

2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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The IPCC-AR6 report suggests that the sea-level in the Persian Gulf is expected to rise by 2.1-4.9mm/year by 2100, which is lower than the global projections of 4-14mm/year. However, a central nationwide ground subsidence in Bahrain's low-lying island can aggravate these figures. The island is only 14-kilometers-wide, yet we observe a 7×12-kilometer ground subsidence with vertical rates up to 20mm/year for 2016-2021. To characterize the subsidence, we use the following methods: (i) SBAS-InSAR with 94 and 131 C-band Sentinel-1A orbital radar acquisitions in ascending and descending directions for 2016-2021, respectively, and (ii) Stacking-InSAR with eight L-band ALOS-1-PALSAR acquisitions for 2007-2010 and six ALOS-2-PALSAR-ScanSAR acquisitions for 2016-2021. Although the observed subsidence velocities are non-linear, we estimate a subsidence of up to 1.5-meters by 2100 by extrapolating the average rates. We suggest three causes associated with this subsidence: (i) Exploitation of the Awali oil field, (ii) Local aquifer depletion, and (iii) Subsurface dissolution of anhydrites and chalky-limestones. To assess the potential impact of subsidence on the shoreline, we measure the coastline evolution at three undisturbed beaches on the West-coast from 1985-to-2021, excluding areas that underwent land-reclamation. Using sub-pixel shoreline detection analysis from 308 Sentinel-2 and Landsat (L5, L7, and L8) acquisitions, we observe that the selected shores remain stable. However, observations reveal a shoreline retreat of up to 5m/year on the southwestern coast for 2003-2014. This rate exceeds the modeled rate of 0.85m/year derived solely from local tide gauge sea-level measure. This nationwide subsidence should be considered when forecasting coastal infrastructure-planning in Bahrain. We recommend performing a similar analysis in other lowlying Gulf islands where oil exploitation occurs.

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“…However, the high cost of HPC equipment hinders the popularization of this strategy. Another way is to improve the TS-InSAR method itself, by introducing sequential adjustment theory for real-time InSAR data processing [20][21][22], introducing a geological model or time-series filtering algorithm for high-dimensional deformation calculation [23][24][25][26], or realizing a high-precision TS-InSAR deformation calculation using block solutions [27,28]. These strategies can improve the efficiency of the TS-InSAR solution to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

A Strategy for Variable-Scale InSAR Deformation Monitoring in a Wide Area: A Case Study in the Turpan–Hami Basin, China

et al. 2022

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In recent years, increasing available synthetic aperture radar (SAR) satellite data and gradually developing interferometric SAR (InSAR) technology have provided the possibility for wide-scale ground-deformation monitoring using InSAR. Traditionally, the InSAR data are processed by the existing time-series InSAR (TS–InSAR) technology, which has inefficient calculation and redundant results. In this study, we propose a wide-area InSAR variable-scale deformation detection strategy (hereafter referred to as the WAVS–InSAR strategy). The strategy combines stacking technology for fast ground-deformation rate calculation and advanced TS–InSAR technology for obtaining fine deformation time series. It adopts an adaptive recognition algorithm to identify the spatial distribution and area of deformation regions (regions of interest, ROI) in the wide study area and uses a novel wide-area deformation product organization structure to generate variable-scale deformation products. The Turpan–Hami basin in western China is selected as the wide study area (277,000 km2) to verify the proposed WAVS–InSAR strategy. The results are as follows: (1) There are 32 deformation regions with an area of ≥1 km2 and a deformation magnitude of greater than ±2 cm/year in the Turpan–Hami basin. The deformation area accounts for 2.4‰ of the total monitoring area. (2) A large area of ground subsidence has occurred in the farmland areas of the ROI, which is caused by groundwater overexploitation. The popularization and application of facility agriculture in the ROI have increased the demand for irrigation water. Due to the influence of the tectonic fault, the water supply of the ROI is mainly dependent on groundwater. Huge water demand has led to a continuous net deficit in aquifers, leading to land subsidence. The WAVS–InSAR strategy will be helpful for InSAR deformation monitoring at a national/regional scale and promoting the engineering application of InSAR technology.

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Monitoring the Vertical Land Motion of Tide Gauges and Its Impact on Relative Sea Level Changes in Korean Peninsula Using Sequential SBAS-InSAR Time-Series Analysis

Cited by 11 publications

References 43 publications

An Analysis of Vertical Crustal Movements along the European Coast from Satellite Altimetry, Tide Gauge, GNSS and Radar Interferometry

An Analysis of Vertical Crustal Movements along the European Coast from Satellite Altimetry, Tide Gauge, GNSS and Radar Interferometry

Nationwide Subsidence in Bahrain Island: Drivers and Implications for Relative Sea-Level Rise

A Strategy for Variable-Scale InSAR Deformation Monitoring in a Wide Area: A Case Study in the Turpan–Hami Basin, China

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