There was a slide near the village of Chakhu in Nepal. Josh Jones is a student at the University of Plymouth.
According to new research, earthquakes and extreme rain can cause a six-fold increase in the rate of rain-triggered landslides.
Every year, the Himalayan nation is 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217
This new study explores how earthquakes and extreme rains can cause higher than normal landslide rates.
Researchers were able to establish a clear pattern between the strength of the monsoon season and the amount of landsliding over a 30-year period by analyzing satellite imagery and rainfall data.
In an average monsoon season, four times as many slides would be expected, but in 1993 and 2002 they were four times as many.
The landscape damage caused by the April 2015 earthquake in Nepal was six times more damaging than expected. The 2016 monsoon season will see an increase in the expected number of slides, with the conditions returning to the average by the end of the year.
The study showed that the most severe landscape damage caused by the 2015 earthquake was not at the epicenter, but in nearby locations where high earthquake peak ground accelerations occurred.
The study was conducted by researchers from the University of East Anglia, University of Plymouth, University of Exeter and the international engineering consulting firm, AECOM.
The building in the Nepal-China border town of Kodari was damaged by rockfalls during the 2015 earthquake. Josh Jones is a student at the University of Plymouth.
Josh Jones, the study's lead author, was based in East Anglia. He said that people in Nepal are frequently affected by landslides during the monsoon season, with widespread damage to homes and infrastructure every year. The study shows how much the risk can be increased by extreme weather and earthquakes. We hope that this information can be used to help local communities plan for future landslide hazard.
Dr. Sarah Boulton said that "once unusual rainfall and flood events are becoming more frequent globally as a result of our changing climates." Climate models show that Nepal is likely to experience increased storminess in the future. There have been two occasions in the last 30 years where annual rainfall could be considered as extreme. Similar events could become more frequent in the future and lead to even more devastating effects for the local populations.
The benefits of collaborative work between industry and academia were shown by Dr. Michael Whitworth. The results of this research can inform disaster risk reduction in vulnerable areas, leading to better planning and mitigation against landslide hazard caused by earthquakes.
Josh spent eight months analyzing 30 years of satellite imagery to create a long-term picture of where and how landslides occur in central and eastern Nepal.
This was mapped against the data from the monsoon, earthquake, and extreme rainfall to show the major factors contributing to increased landslide occurrences.
Nepal has a record of just under 13,700 landslides over a geographical area of more than 42,000 km2.
It shows the geographical characteristics of areas most susceptible to future landslides, and how that risk might be affected by both large earthquakes and extreme weather.
The 30-year record of Himalaya mass-wasting shows landscape changes by extreme events. There is a DOI of 10.1038/s41467-021-26964-8.
Nature Communications is a journal.
There was a significant increase in the rates of land slides in Nepal due to earthquakes and extreme rain.
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