Inventory of landslides triggered by an extreme rainfall event in Marche-Umbria, Italy, on 15 September 2022

  1. Santangelo, Michele
  2. AlThuwaynee, Omar
  3. Alvioli, Massimiliano
  4. Ardizzone, Francesca
  5. Bianchi, Cinzia
  6. Bornaetxea, Txomin
  7. Brunetti, Maria Teresa
  8. Bucci, Francesco
  9. Cardinali, Mauro
  10. Donnini, Marco
  11. Esposito, Giuseppe 1
  12. Gariano, Stefano Luigi
  13. Grita, Susanna
  14. Marchesini, Ivan
  15. Melillo, Massimo
  16. Peruccacci, Silvia
  17. Salvati, Paola
  18. Yazdani, Mina
  19. Fiorucci, Federica
  1. 1 Delft University of Technology
    info

    Delft University of Technology

    Delft, Holanda

    ROR https://ror.org/02e2c7k09

Éditeur: figshare

Année de publication: 2023

Type: Dataset

CC BY 4.0

DOI: 10.6084/M9.FIGSHARE.21981842.V1 lock_openAccès ouvert editor

Résumé

This paper describes the event landslide inventory map produced to record the ground effects of the extreme rainfall event that hit Umbria-Marche, central Italy, on 15th September 2022. The rainfall event hit an area of ~5,000 km<sup>2</sup>, with peak rainfall intensities of 419 mm in 9 hours, an exceptionally intense rainfall for this area. The event generated widespread flooding also outside the area affected by rainfall. The rainfall event produced widespread landslides across an area of nearly 1,000 km<sup>2</sup>. As a direct consequence of floods and landslides, many roads were interrupted and extensive damages were recorded to structures and infrastructures. The landslide inventory presented is the result of an extensive reconnaissance field survey covering a large neighbourhood of the area affected by the highest rainfall intensity. The inventory covers an area of 550 km<sup>2</sup> and includes 1,687 landslides, corresponding to an average density of about 3.1 landslides per square kilometre. Landslide size (Landslide Area, A<sub>L</sub> in m<sup>2</sup>) is in the range ~1 m<sup>2</sup> &lt; A<sub>L</sub> &lt; 5.7 × 10<sup>4</sup> m<sup>2</sup>. Overall, landslides cover an area of 1.1 km<sup>2</sup>,<sup> </sup>which represents 0.2% of the Area of Interest (AOI). In the final inventory, a total of 1,243 landslides were mapped as polygons directly in the field, whereas the remaining 444 landslides were mapped as points (i.e. without information on landslide area). After post-processing activities, 512 polygons were transformed into points because their area was below the threshold of 225 m<sup>2</sup>. Therefore, in the final map, 731 landslides are represented as polygons and 956 as points, ~54% of which kept the value of the original area. This repository stores: A polygon shapefile of the AOI A polygon shapefile of the raw inventory A point shapefile of the raw inventory A polygon shapefile of the final inventory A point shapefile of the final inventory This dataset consistently supports the scale of 1:15 000. As a consequence, all polygons smaller than 225 m<sup>2</sup> (i.e. a square of 1 mm per side in the map) in the raw data polygon layer were transformed into points because their size was too small to be represented as polygons at 1:15000 scale. <br> <br>