Just to clarify that Vajont was a failure of the slope upstream the dam inside the reservoir. Nothing related to breaching.

https://www.researchgate.net/publication/286511226_An_assessment_of_the_material_point_method_for_modelling_large_scale_run-out_processes_in_landslides

Dear Ijaz,

In high risk areas regarding to possible landslides will be present in future, the appropriate geotechnical monitoring should be installed as soon as possible.

Here is a link to the Denver and Rio Grande Railroad's summary of what they did to address the lake/impoundment created by the Thistle landslide in 1983.

http://www.drgw.net/info/ThistleMudslide

Dear Ijaz,

You may have a look at the papers by Xuanmei Fan, e.g.:

Article Transient water and sediment storage of the decaying landsli...

Article Simulating dam-breach flood scenarios of the Tangjiashan lan...

And her PhD thesis:

Book Understanding the causes and effects of earthquake-induced l...