Table 15 Risk values for the heavy rainfall hazard chain.

From: A directed weighted network approach for hazard chain risk assessment including heavy rainfall induced geological disasters and flooding

Hazard chain type

Risk value R

Key affected segments

Characterisation analysis

Heavy rainfall–geological hazard chain

21.47

Landslide, debris flow

Spatially dispersed distribution, with localised impact

Heavy rainfall–flooding chain

27.65

River confluence, urban drainage congestion

The impact is concentrated in river valleys and low-lying areas within urban districts

Heavy rainfall–geological hazard–flooding chain

34.23

Landslides blocking valleys and gorges, and the breach of earthen dams causing floods

The cumulative amplification effect is pronounced, exhibiting a chain-like progression

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