Preprints
https://doi.org/10.5194/essd-2021-414
https://doi.org/10.5194/essd-2021-414

  20 Dec 2021

20 Dec 2021

Review status: this preprint is currently under review for the journal ESSD.

A national landslide inventory of Denmark

Gregor Luetzenburg1, Kristian Svennevig2, Anders Anker Bjørk1, Marie Keiding2, and Aart Kroon1 Gregor Luetzenburg et al.
  • 1Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark
  • 2Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark

Abstract. Landslides are a frequent natural hazard occurring globally in regions with steep topography. Additionally, landslides are playing an important role in landscape evolution by transporting sediment downslope. Landslide inventory mapping is a common technique to assess the spatial distribution and extend of landslides in an area of interest. High-resolution digital elevation models (DEMs) have proven to be useful databases to map landslides in large areas across different land covers and topography. So far, Denmark had no national landslide inventory. Here we create the first comprehensive national landslide inventory for Denmark derived from a 40 cm resolution DEM from 2015 supported by several 12.5 cm resolution orthophotos. The landslide inventory is created based on a manual expert-based mapping approach, and we implemented a quality control mechanism to assess the completeness of the inventory. Overall, we mapped 3202 landslide polygons in Denmark with a level of completeness of 87 %. The landslide inventory can act as a starting point for a more comprehensive hazard and risk reduction framework for Denmark. Furthermore, machine-learning algorithms can use the dataset as a training dataset to improve future automated mapping approaches. The complete landslide inventory is made freely available for download at https://doi.org/10.6084/m9.figshare.16965439.v1 (Svennevig and Luetzenburg, 2021) or as web map (https://data.geus.dk/landskred/) for further investigations.

Gregor Luetzenburg et al.

Status: open (until 14 Feb 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-414', Anonymous Referee #1, 08 Jan 2022 reply
  • RC2: 'Comment on essd-2021-414', Cees van Westen, 11 Jan 2022 reply

Gregor Luetzenburg et al.

Data sets

Danish landslide inventory 211104 Kristian Svennevig and Gregor Luetzenburg https://doi.org/10.6084/m9.figshare.16965439.v1

Gregor Luetzenburg et al.

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Short summary
We produced the first landslide inventory for Denmark. Over 3200 landslides were mapped using a high-resolution elevation model and orthophotos. We implemented an independent validation into our mapping and found an overall level of completeness of 87 %. The national inventory represents a range of landslide sizes covering all regions that were covered by glacial ice during the last glacial period. This inventory will be used for investigating landslide causes and for natural hazard mitigation.