Comprehensive search ChatGPT Online Scientific research tools
Sign in Sign Up

Science hub Mutual Aid community


[Other] Preliminary analysis of the mechanism in the July 16, 2022 Gaojiashan cascading hazard: a landslide-induced debris flow in Southwest China

AjiMarwadi Post time 3 day(s) ago | Show all posts |Read mode
Reward30points

Peng, T., Chen, N., Mergili, M. et al. Preliminary analysis of the mechanism in the July 16, 2022 Gaojiashan cascading hazard: a landslide-induced debris flow in Southwest China. Bull Eng Geol Environ 83, 292 (2024). https://doi.org/10.1007/s10064-024-03790-y


Abstract
Debris flows can be triggered by landslides and lake outbursts, constituting cascading hazards that pose threats to life and property. However, cascading mechanisms are poorly understood due to the complex energy transfer and material transformation among precipitation, landslides, floods, and debris flows. Here, we aim to identify the cascading mechanisms and key controls of the Gaojiashan debris flow and provide insights applicable to other cascading hazards. Our study integrates field measurements and numerical simulations, combining data on runoff discharge, landslide stability, overtopping volume, and debris-flow discharge. We show that gravity-driven high-altitude water sources control the weakening and entrainment of sediment sources in cascading. Water convergence and seepage due to intense precipitation, elevate pore pressure and weaken sediment sources, triggering landslides and initiating cascading hazards. Water from the overtopped landslide impulse wave, combined with runoff, entrained wet gully bed materials, and formed the debris flow. A physical approach that accounts for the strength of wet sediment sources and the paths of unstable water release in mountains may therefore be applicable for assessing cascading hazards. This work provides a reference for reducing the losses caused by cascading hazards.

You can support us by donating, we would be very grateful.
Reply

Use magic Donate Report

All Reply0 Show all posts

Reply

Advanced Mode
B Color Image Link Quote Code Smilies
You have to log in before you can reply Login | Register

Points Rules

AjiMarwadi Lv.4
Senior Member

  • post

  • reply

  • points

    920

Same Category

Latest Reply

Announcement

Enthusiastic users today

Return to the list