Coseismic and monsoon-triggered landslide impacts on remote trekking infrastructure, Langtang Valley, Nepal

摘要: In 2015, the Mw 7.8 Gorkha earthquake struck Nepal, triggering thousands of landslides across central and eastern Himalayas. These 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 Kathmandu. It one most popular trekking Nepal has been severely affected by earthquake-triggered monsoon-triggered landsliding. Here, qualitative quantitative observations from fieldwork remote sensing are used describe materials geomorphology Valley, quantify extent which coseismic have Langtang9s infrastructure. The dominant bedrock involved within found be range gneisses intruded leucogranites. total, 64 intersected paths Langtang, with having an impact c. 3 km 0.8 km path respectively. observed practice reconstructing through unstable landslide deposits leaving infrastructure increasingly vulnerable future failure.