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Analysis of building deformation in landslide area using multisensor PSInSAR ™ technique

View Article: PubMed Central - PubMed

ABSTRACT

We analyze ground deformation velocities of the buildings in San Fratello (Sicily, Italy).

We analyze satellite PSI data using different sensors, acquired from 1992 to 2012.

We performed a damages assessment map after the landslide occurred on the 14th February 2010.

The obtained data were compared to evaluate the residual risk.

The obtained data were compared to evaluate the residual risk.

No MeSH data available.


Related in: MedlinePlus

(a) RADARSAT-1 ascending PS dataset; (b) comparison between the ground deformation velocity map and the damage assessment map; (c) time series correspondent to the yellow asterisk; (d) time series correspondent to the orange asterisk.
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fig0040: (a) RADARSAT-1 ascending PS dataset; (b) comparison between the ground deformation velocity map and the damage assessment map; (c) time series correspondent to the yellow asterisk; (d) time series correspondent to the orange asterisk.

Mentions: RADARSAT-1 data can be used to confirm the results obtained by ENVISAT data due to the partial overlapping of their temporal coverage. The main advantage of the use of RADARSAT-1 is represented by the higher density of PS that allows mapping the deformation velocity of almost the half (48.37%) of the monitored buildings. Results clearly highlight three areas where buildings are affected by deformation (Fig. 7). The first area is located within the eastern slope, confirming the results of ENVISAT data. In addition, the deformation of the edifices located along the 1922 landslide crown is confirmed. The third area corresponds to the San Benedetto quarter, where four buildings show velocities slightly higher than the stability range. Considering the whole PS RADARSAT-1 ascending dataset (Fig. 8a), the area affected by ground deformation located within the eastern slope is clearly recognizable. Also, in this case, the agreement between the ground deformation velocities and the damage assessment map is good (Fig. 8b), confirming the usefulness of the C-band sensors relatively to this area, where the buildings affected by severe damages are surrounded by PS showing the highest velocities. Also along the western slope, RADARSAT-1 confirms the results obtained by ENVISAT highlighting the presence of ground deformation within the body and along the 1922 landslide crown.


Analysis of building deformation in landslide area using multisensor PSInSAR ™ technique
(a) RADARSAT-1 ascending PS dataset; (b) comparison between the ground deformation velocity map and the damage assessment map; (c) time series correspondent to the yellow asterisk; (d) time series correspondent to the orange asterisk.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5384476&req=5

fig0040: (a) RADARSAT-1 ascending PS dataset; (b) comparison between the ground deformation velocity map and the damage assessment map; (c) time series correspondent to the yellow asterisk; (d) time series correspondent to the orange asterisk.
Mentions: RADARSAT-1 data can be used to confirm the results obtained by ENVISAT data due to the partial overlapping of their temporal coverage. The main advantage of the use of RADARSAT-1 is represented by the higher density of PS that allows mapping the deformation velocity of almost the half (48.37%) of the monitored buildings. Results clearly highlight three areas where buildings are affected by deformation (Fig. 7). The first area is located within the eastern slope, confirming the results of ENVISAT data. In addition, the deformation of the edifices located along the 1922 landslide crown is confirmed. The third area corresponds to the San Benedetto quarter, where four buildings show velocities slightly higher than the stability range. Considering the whole PS RADARSAT-1 ascending dataset (Fig. 8a), the area affected by ground deformation located within the eastern slope is clearly recognizable. Also, in this case, the agreement between the ground deformation velocities and the damage assessment map is good (Fig. 8b), confirming the usefulness of the C-band sensors relatively to this area, where the buildings affected by severe damages are surrounded by PS showing the highest velocities. Also along the western slope, RADARSAT-1 confirms the results obtained by ENVISAT highlighting the presence of ground deformation within the body and along the 1922 landslide crown.

View Article: PubMed Central - PubMed

ABSTRACT

We analyze ground deformation velocities of the buildings in San Fratello (Sicily, Italy).

We analyze satellite PSI data using different sensors, acquired from 1992 to 2012.

We performed a damages assessment map after the landslide occurred on the 14th February 2010.

The obtained data were compared to evaluate the residual risk.

The obtained data were compared to evaluate the residual risk.

No MeSH data available.


Related in: MedlinePlus