SAR time-series Research Papers - Academia.edu (original) (raw)

Hydrologic element specifically precipitation was fathomed to contribute in land deformation of karst landscape. Cempaka Tropical Cyclone (TC) had ensued in the last of 2017 in the Indian Ocean implicated to a high rate of rainfall upon... more

Hydrologic element specifically precipitation was fathomed to contribute in land deformation of karst landscape. Cempaka Tropical Cyclone (TC) had ensued in the last of 2017 in the Indian Ocean implicated to a high rate of rainfall upon the karst landscape of Gunung Sewu. This research aimed to identify the areas where sustained of land deformation due to the Cempaka TC. This research used a method of Differential Interferometry Synthetic Aperture Radar (DInSAR) by utilising a pair of Sentinel-1A satellite imageries to obtain the information of land deformation. The research result demonstrated the karst landscape of Gunung Sewu encountered land deformation after the Cempaka TC had impinged it. The land deformation occurred in the northern region of Gunung Sewu karst landscape in the forms of land uplifting with a range of 1 – 2 mm/year (115.36 km2) and gradually became a land subsidence with a range of -1 - -4 mm/year (989.25 km2) in the southern region of Gunung Sewu karst landsca...

In the framework of the Terrafirma Extension project, a study has been established for ground motion detection and mapping in the Anthemountas basin (Central Macedonia). Terrafirma promotes the exploitation of Persistent Scatterer... more

In the framework of the Terrafirma Extension project, a study has been established for ground motion detection and mapping in the Anthemountas basin (Central Macedonia). Terrafirma promotes the exploitation of Persistent Scatterer Interferometry (PSI) techniques, a remote sensing technology based on multi-temporal satellite Synthetic Aperture Radar (SAR) imagery. The potential of SAR interferometry has been exploited through the innovative Wide Area Mapping approach, recently implemented by the German Space Agency (DLR) and aimed at measuring land deformation over large areas. Interferometric results from 1995-2001 by ERS1/2 satellites has been analyzed at a basin scale to investigate spatial patterns of land motion in the wider Anthemountas plain, where subsidence phenomena related to intense groundwater extraction is clearly manifested. The WAP results turned out to be a valuable tool for the characterization at local scale of the land subsidence in the runaways area of the Mac...

We studied the broader area of Thessaloniki in northern Greece and Chalkidiki and performed an InSAR campaign to study the surface deformation phenomena that have been known to exist for at least two decades. Sentinel-1 data (2015–2019)... more

We studied the broader area of Thessaloniki in northern Greece and Chalkidiki and performed an InSAR campaign to study the surface deformation phenomena that have been known to exist for at least two decades. Sentinel-1 data (2015–2019) together with drill measurements were exploited to focus on specific sites of interest. Our results indicate an ongoing displacement field. At the region of Kalochori and Sindos—where intense subsidence in the 1990s was previously found to have had a natural surface rebound in the 2000s—a new period of subsidence, caused by the enlivenment of the groundwater overexploitation, was reported. The uplifting trend of Oreokastro is still active and subsidence in Anthemountas graben is ongoing; special focus was set on the Makedonia Airport, where significant displacement is occurring. The study also reveals a new area at Nea Moudania, that was not known previously to deform; another case corresponding to anthropogenic-induced surface displacement. Thessalo...

Using DInSAR1 techniques in the study of earth surface movements such as subsidence, acceptable results can be achieved. In recent years this way was considered by many researchers. The results of this method can be compared to verify the... more

Using DInSAR1 techniques in the study of earth surface movements such as subsidence, acceptable results can be achieved. In recent years this way was considered by many researchers. The results of this method can be compared to verify the geotechnical methods and Used for interpreting movements occurred. In this paper also to evaluation the process of Damaneh plain subsidence in Iran, from sensor radar data ASAR, 4 images related to the period from 2005 (track 250) and 3 images related to the period 2011-2012 (track 457) was used. These data were processed in software SARSCAPE and was determined the amount and level of subsidence From 5 interferogram obtained. Therefore subsidence rate was obtained in the period of 8 months of 2005, and ranged from 20110712 to 20120108, 7.6 cm and 7 cm, respectively. Subsidence in the northern part of Damaneh plains, Isfahan in Iran has spread greater, which that was adapted with joints and gaps been picked in the field.

The industrial area of Oreokastro, NW of the city of Thessaloniki, is monitored using radar interferometry to determine the spatial evolution of the underlying ground deformation trends. Previous studies, using SAR data acquired between... more

The industrial area of Oreokastro, NW of the
city of Thessaloniki, is monitored using radar interferometry
to determine the spatial evolution of the underlying
ground deformation trends. Previous studies, using SAR
data acquired between 1992 and 1999, have revealed
subsidence; however, the driving mechanism has not been,
so far, solidly explained. Here, SAR satellite data from
ERS 1, 2 and ENVISAT missions, acquired between 1992
and 2010, are analysed to enhance our understanding of the
ground displacement trends and provide a thorough interpretation
of the phenomena. The analysis confirms a subsiding
displacement pattern from 1992 to 1999, whereas
the recent data indicate that after 2003 the motion direction
has changed to uplift. This whole monitoring of subsidence
and the subsequent uplift is a rarely documented phenomenon,
and in the case of Oreokastro is not reflecting a
natural process; on the contrary, the driver is anthropogenic,
related to the regional aquifer activity. Our study
also highlights the fact that the local faults act as
groundwater barriers and captures the existence of a possible
previously unknown tectonic structure.

Land subsidence in the broader Kalochori village region, at the west side of Thessaloniki, has been recorded since the early 1960s reaching gradually, next to the coastline, maximum values of 3–4 m. Temporal monitoring of terrain... more

Land subsidence in the broader Kalochori village region, at the west side of Thessaloniki, has been recorded since the early 1960s reaching gradually, next to the coastline, maximum values of 3–4 m. Temporal monitoring of terrain movements are exploited and combined with in-situ data to enhance understanding of the deformation signals. Persistent Scatterer Interferometry (PSI) and Small Baseline Subset (SBAS) multi-temporal Interferometric approach are applied for the analysis of a 20 year ERS 1, 2 and ENVISAT dataset. The velocities estimated for the ERS dataset are in excellent accordance with previous studies, depicting subsidence with magnitude up to 35 mm/year. The intriguing output of the ENVISAT data archive (2003–2010) shows that, during the second decade , there was a change in motion trend, from subsidence to uplift. The fact that this uplifting trend of the second decade is well correlated with hydrogeological data of the area that show a synchronous rise of the aquifer level, verifies the dominating driver of the human factor concerning the land subsidence phenomena taking place the last 55 years. This conclusion is further supported by the fact that since 2007 the uplifting signal becomes smoother, following the smoother recovery of the aquifers.