Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data
Landslide mapping and analysis are essential aspects of hazard and risk analysis. Landslides can block rivers and create landslide-dammed lakes, which pose a significant risk for downstream areas. In this research, we used an object-based image analysis approach to map geomorphological features and...
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ftmdpi:oai:mdpi.com:/2076-3417/10/17/5848/ 2023-08-20T04:07:22+02:00 Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data Zahra Dabiri Daniel Hölbling Lorena Abad Jón Kristinn Helgason Þorsteinn Sæmundsson Dirk Tiede agris 2020-08-24 application/pdf https://doi.org/10.3390/app10175848 EN eng Multidisciplinary Digital Publishing Institute Earth Sciences and Geography https://dx.doi.org/10.3390/app10175848 https://creativecommons.org/licenses/by/4.0/ Applied Sciences; Volume 10; Issue 17; Pages: 5848 object-based image analysis Sentinel-1 Sentinel-2 digital elevation model InSAR landslide landslide-dammed lake river Iceland Text 2020 ftmdpi https://doi.org/10.3390/app10175848 2023-07-31T23:58:25Z Landslide mapping and analysis are essential aspects of hazard and risk analysis. Landslides can block rivers and create landslide-dammed lakes, which pose a significant risk for downstream areas. In this research, we used an object-based image analysis approach to map geomorphological features and related changes and assess the applicability of Sentinel-1 data for the fast creation of post-event digital elevation models (DEMs) for landslide volume estimation. We investigated the Hítardalur landslide, which occurred on the 7 July 2018 in western Iceland, along with the geomorphological changes induced by this landslide, using optical and synthetic aperture radar data from Sentinel-2 and Sentinel-1. The results show that there were no considerable changes in the landslide area between 2018 and 2019. However, the landslide-dammed lake area shrunk between 2018 and 2019. Moreover, the Hítará river diverted its course as a result of the landslide. The DEMs, generated by ascending and descending flight directions and three orbits, and the subsequent volume estimation revealed that—without further post-processing—the results need to be interpreted with care since several factors influence the DEM generation from Sentinel-1 imagery. Text Iceland MDPI Open Access Publishing Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Hítardalur ENVELOPE(-22.067,-22.067,64.767,64.767) Hítará ENVELOPE(-22.335,-22.335,64.698,64.698) Applied Sciences 10 17 5848 |
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Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
object-based image analysis Sentinel-1 Sentinel-2 digital elevation model InSAR landslide landslide-dammed lake river Iceland |
spellingShingle |
object-based image analysis Sentinel-1 Sentinel-2 digital elevation model InSAR landslide landslide-dammed lake river Iceland Zahra Dabiri Daniel Hölbling Lorena Abad Jón Kristinn Helgason Þorsteinn Sæmundsson Dirk Tiede Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data |
topic_facet |
object-based image analysis Sentinel-1 Sentinel-2 digital elevation model InSAR landslide landslide-dammed lake river Iceland |
description |
Landslide mapping and analysis are essential aspects of hazard and risk analysis. Landslides can block rivers and create landslide-dammed lakes, which pose a significant risk for downstream areas. In this research, we used an object-based image analysis approach to map geomorphological features and related changes and assess the applicability of Sentinel-1 data for the fast creation of post-event digital elevation models (DEMs) for landslide volume estimation. We investigated the Hítardalur landslide, which occurred on the 7 July 2018 in western Iceland, along with the geomorphological changes induced by this landslide, using optical and synthetic aperture radar data from Sentinel-2 and Sentinel-1. The results show that there were no considerable changes in the landslide area between 2018 and 2019. However, the landslide-dammed lake area shrunk between 2018 and 2019. Moreover, the Hítará river diverted its course as a result of the landslide. The DEMs, generated by ascending and descending flight directions and three orbits, and the subsequent volume estimation revealed that—without further post-processing—the results need to be interpreted with care since several factors influence the DEM generation from Sentinel-1 imagery. |
format |
Text |
author |
Zahra Dabiri Daniel Hölbling Lorena Abad Jón Kristinn Helgason Þorsteinn Sæmundsson Dirk Tiede |
author_facet |
Zahra Dabiri Daniel Hölbling Lorena Abad Jón Kristinn Helgason Þorsteinn Sæmundsson Dirk Tiede |
author_sort |
Zahra Dabiri |
title |
Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data |
title_short |
Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data |
title_full |
Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data |
title_fullStr |
Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data |
title_full_unstemmed |
Assessment of Landslide-Induced Geomorphological Changes in Hítardalur Valley, Iceland, Using Sentinel-1 and Sentinel-2 Data |
title_sort |
assessment of landslide-induced geomorphological changes in hítardalur valley, iceland, using sentinel-1 and sentinel-2 data |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/app10175848 |
op_coverage |
agris |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(-22.067,-22.067,64.767,64.767) ENVELOPE(-22.335,-22.335,64.698,64.698) |
geographic |
Dammed Lake Hítardalur Hítará |
geographic_facet |
Dammed Lake Hítardalur Hítará |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Applied Sciences; Volume 10; Issue 17; Pages: 5848 |
op_relation |
Earth Sciences and Geography https://dx.doi.org/10.3390/app10175848 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/app10175848 |
container_title |
Applied Sciences |
container_volume |
10 |
container_issue |
17 |
container_start_page |
5848 |
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1774718950368608256 |