At
4.22.24
Dave Petley
Planet Labs image of the valley blocking landslide from the Hualien landslide. Image copyright Planet Labs, used with permission. Credit: Planet Labs
The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides.
A 700 m long lake has formed behind the debris from a rockslide in Taiwan.
“As the analysis of the landslides triggered by the 3 April 2024 Mw=7.4 Hualien earthquake in Taiwan continues, it has emerged that there is at least one valley-blocking landslide. Taiwan News has a good article, which includes this image collected by the Forestry and Nature Conservation Agency in Taiwan:-
The valley-blocking landslide in Hualien County, Taiwan. Credit: Forestry and Nature Conservation Agency
I have rotated the landslide so that north is approximately to the north. This landslide is located at [24.008, 121.378]. The river is flowing from the west towards the east, with the landslide moving from the south towards the north. The main landslide scar in the image is about 300 m long from the crown to the lake, but it appears that part of this failure has occurred a little to the west, in a failure with a length of about 200 metres.
Whilst this area is sparsely populated, downstream are two small hydroelectric schemes and then, at a distance of about 15 km, Tongmen village. However, as Tongmen is located 20 above the river level, it is not thought to be threatened.
It is clear that the dam has overtopped, with steady water flow. The site will need to be monitored, especially going into the typhoon season, but the overall risk is likely to be quite low.”
See the full article here .
Comments are invited and will be appreciated, especially if the reader finds any errors which I can correct.
five-ways-keep-your-child-safe-school-shootings
Please help promote STEM in your local schools.
“Eos” is the leading source for trustworthy news and perspectives about the Earth and space sciences and their impact. Its namesake is Eos, the Greek goddess of the dawn, who represents the light shed on understanding our planet and its environment in space by the Earth and space sciences.
sciencesprings 