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Debris flow at Luib on the A87 strategic road: Isle of Skye, Scotland.
- Source :
- Quarterly Journal of Engineering Geology & Hydrogeology; May2024, Vol. 57 Issue 2, p1-10, 10p
- Publication Year :
- 2024
-
Abstract
- A rainfall-induced debris flow occurred on 30 September 2022, closing the A87 trunk (strategic) road on the Isle of Skye for around 2 h. Ground-based and aerial drone inspections were used to describe the event and a comprehensive rainfall analysis was undertaken. It is concluded that the event was triggered by overland water flow from the slopes above the source zone as a result of high rainfall. The resulting translational slide transitioned into a debris flow that reached a pre-existing channel where entrained superficial deposits were deposited, adding to pre-existing levee structures before reaching the road. The rainfall that led to the debris flow was high intensity–low duration; the rainfall analysis encompasses annual, monthly, daily, hourly and 15 min data, each aiding understanding of the climate of the area and/or the event rainfall. Comparison is made with a rainfall event the following month, which was of a greater magnitude but of longer duration and lower intensity. The hazard at this location is a concern but the risk is emphasized by the proximity of the road to the steep slopes above and the lack of a viable detour. Thematic collection: This article is part of the Geo-resilience and infrastructure collection available at: https://www.lyellcollection.org/topic/collections/geo-resilience-and-infrastructure [ABSTRACT FROM AUTHOR]
- Subjects :
- DEBRIS avalanches
RAINFALL
ISLANDS
LEVEES
MASS-wasting (Geology)
Subjects
Details
- Language :
- English
- ISSN :
- 14709236
- Volume :
- 57
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Quarterly Journal of Engineering Geology & Hydrogeology
- Publication Type :
- Academic Journal
- Accession number :
- 176908787
- Full Text :
- https://doi.org/10.1144/qjegh2023-111