Coseismic and monsoon-triggered landslide impacts on remote trekking infrastructure, Langtang Valley, Nepal
| Autor: | Georgina L. Bennett, Michael R. Z. Whitworth, Joshua Nathan Jones, Martin Stokes, Sarah J. Boulton |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
geography
geography.geographical_feature_category Bedrock 0211 other engineering and technologies Geology Landslide 02 engineering and technology 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology Monsoon 01 natural sciences Remote sensing (archaeology) Earth and Planetary Sciences (miscellaneous) Physical geography 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Quarterly Journal of Engineering Geology and Hydrogeology. 53:159-166 |
| ISSN: | 2041-4803 1470-9236 |
| Popis: | In 2015, the Mw 7.8 Gorkha earthquake struck Nepal, triggering thousands of landslides across the central and eastern Himalayas. These landslides had many adverse effects, including causing widespread damage to low-grade transport routes (e.g. tracks, footpaths) in rural regions that depend on tourism for survival. Langtang Valley is a glacial–periglacial landscape located 60 km north of Kathmandu. It is one of the most popular trekking regions in Nepal and has been severely affected by Gorkha earthquake-triggered and monsoon-triggered landsliding. Here, qualitative and quantitative observations from fieldwork and remote sensing are used to describe the materials and geomorphology of the landslides across Langtang Valley, and to quantify the extent to which coseismic and monsoon-triggered landslides have affected Langtang9s trekking infrastructure. The dominant bedrock materials involved within Langtang landslides are found to be a range of gneisses and intruded leucogranites. In total, 64 landslides are found to have intersected trekking paths across Langtang, with coseismic and monsoon-triggered landslides having an impact on c. 3 km and 0.8 km of path respectively. It is observed that the practice of reconstructing paths through unstable landslide deposits is leaving the trekking infrastructure across Langtang increasingly vulnerable to future failure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|