Table 4 The warning levels of landslides with creep deformation in Yunyang County.

1–2

No deformation or very slow deformation

No measures or attention to macroscopic deformation on landslide

92.4 mm (threshold 1)

3

Slow deformation

Set up CBDRR system and attention to CBDRR simple monitoring data

156.5 mm (threshold 2)

4

Uniform or temporary accelerated deformation

Perform professional monitoring, analyze the monitoring data and make emergency plan

192.6 mm (threshold 3)

5

Accelerated deformation and failure

Perform monitoring at full-time; risk management made by government and experts; residents evacuation or emergency drilling

>192.6 mm