Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns
We studied the kinematic behaviour of active landslides at several localities in the area of Panachaikon Mountain, Achaia (Peloponnese, Greece) using Sentinel (C-band) InSAR time series analysis. We processed LiCSAR interferograms using the SBAS tool, and we obtained average displacement maps for th...
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MDPI AG
2022-02-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/4/844 |
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| author | Varvara Tsironi Athanassios Ganas Ioannis Karamitros Eirini Efstathiou Ioannis Koukouvelas Efthimios Sokos |
| author_facet | Varvara Tsironi Athanassios Ganas Ioannis Karamitros Eirini Efstathiou Ioannis Koukouvelas Efthimios Sokos |
| author_sort | Varvara Tsironi |
| collection | DOAJ |
| description | We studied the kinematic behaviour of active landslides at several localities in the area of Panachaikon Mountain, Achaia (Peloponnese, Greece) using Sentinel (C-band) InSAR time series analysis. We processed LiCSAR interferograms using the SBAS tool, and we obtained average displacement maps for the period 2016–2021. We found that the maximum displacement rate of each landslide is located at about the center of it. The average E-W velocity of the Krini landslide is ~3 cm/year (toward the east) and 0.6 cm/year downward. The line-of-sight (LOS) velocity of the landslide (descending orbit) compares well to a co-located GNSS station within (±) 3 mm/yr. Our results also suggest a correlation between rainfall and landslide motion. For the Krini landslide, a cross-correlation analysis of our data suggests that the mean time lag was 13.5 days between the maximum seasonal rainfall and the change in the LOS displacement rate. We also found that the amount of total seasonal rainfall controls the increase in the displacement rate, as 40–550% changes in the displacement rate of the Krini landslide were detected, following to a seasonal maximum of rainfall values at the nearby meteorological station of Kato Vlassia. According to our results, it seems that large part of this mountainous region of Achaia suffers from slope instability that is manifested in various degrees of ground displacement greatly affecting its morphological features and inhabited areas. |
| first_indexed | 2024-03-09T21:09:31Z |
| format | Article |
| id | doaj.art-bf02fe57953e4703bb64df2b48b220a6 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T21:09:31Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-bf02fe57953e4703bb64df2b48b220a62023-11-23T21:53:03ZengMDPI AGRemote Sensing2072-42922022-02-0114484410.3390/rs14040844Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall PatternsVarvara Tsironi0Athanassios Ganas1Ioannis Karamitros2Eirini Efstathiou3Ioannis Koukouvelas4Efthimios Sokos5National Observatory of Athens, Institute of Geodynamics, Lofos Nymfon, Thission, 11810 Athens, GreeceNational Observatory of Athens, Institute of Geodynamics, Lofos Nymfon, Thission, 11810 Athens, GreeceNational Observatory of Athens, Institute of Geodynamics, Lofos Nymfon, Thission, 11810 Athens, GreeceNational Observatory of Athens, Institute of Geodynamics, Lofos Nymfon, Thission, 11810 Athens, GreeceDepartment of Geology, University of Patras, 26504 Rio, GreeceDepartment of Geology, University of Patras, 26504 Rio, GreeceWe studied the kinematic behaviour of active landslides at several localities in the area of Panachaikon Mountain, Achaia (Peloponnese, Greece) using Sentinel (C-band) InSAR time series analysis. We processed LiCSAR interferograms using the SBAS tool, and we obtained average displacement maps for the period 2016–2021. We found that the maximum displacement rate of each landslide is located at about the center of it. The average E-W velocity of the Krini landslide is ~3 cm/year (toward the east) and 0.6 cm/year downward. The line-of-sight (LOS) velocity of the landslide (descending orbit) compares well to a co-located GNSS station within (±) 3 mm/yr. Our results also suggest a correlation between rainfall and landslide motion. For the Krini landslide, a cross-correlation analysis of our data suggests that the mean time lag was 13.5 days between the maximum seasonal rainfall and the change in the LOS displacement rate. We also found that the amount of total seasonal rainfall controls the increase in the displacement rate, as 40–550% changes in the displacement rate of the Krini landslide were detected, following to a seasonal maximum of rainfall values at the nearby meteorological station of Kato Vlassia. According to our results, it seems that large part of this mountainous region of Achaia suffers from slope instability that is manifested in various degrees of ground displacement greatly affecting its morphological features and inhabited areas.https://www.mdpi.com/2072-4292/14/4/844InSARGNSSlandsliderainfallAchaiaGreece |
| spellingShingle | Varvara Tsironi Athanassios Ganas Ioannis Karamitros Eirini Efstathiou Ioannis Koukouvelas Efthimios Sokos Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns Remote Sensing InSAR GNSS landslide rainfall Achaia Greece |
| title | Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns |
| title_full | Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns |
| title_fullStr | Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns |
| title_full_unstemmed | Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns |
| title_short | Kinematics of Active Landslides in Achaia (Peloponnese, Greece) through InSAR Time Series Analysis and Relation to Rainfall Patterns |
| title_sort | kinematics of active landslides in achaia peloponnese greece through insar time series analysis and relation to rainfall patterns |
| topic | InSAR GNSS landslide rainfall Achaia Greece |
| url | https://www.mdpi.com/2072-4292/14/4/844 |
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