Estimation of Risk Thresholds for a Landslide in the Three Gorges Reservoir Based on a KDE-Copula-VaR Approach
Table 5
The three-level risk-based threshold and the copula-based velocity for the Baishuihe Landslide using the KDE-Copula-VaR approach.
Confidence level
Thresholds
Copula-based velocity
Risk response
0.85
VaR0.85: ,
Yellow alert: more frequent and comprehensive monitoring, issuing the information to expert and decision-maker groups
0.90
VaR0.90: ,
Orange alert: 24 h continuous and comprehensive monitoring and general inspection; development of emergency mitigation, preparedness, response, and evacuation plans; and a consultation meeting between experts and government decision makers
0.95
VaR0.95: ,
Red alert: 24 h continuous and comprehensive monitoring and general inspection, deployment of warning signs, closure of roads and river channels, and issuance of evacuation orders