Table 2. The number of samples collected for each soil and geological property.

Properties	Year of data collection	The number of collected data
		Total	Slow-moving landslide prone area	Control area
Ratio of soil particle less than 0.075 mm	2019, 2021	200	74	126
Ratio of soil particle less than 0.002 mm	2021	100	38	62
Wet unit weight	2019, 2021	200	74	126
Void ratio	2021	100	38	62
Permeability	2021	100	38	62
Cohesion	2019, 2021	200	74	126
Internal friction angle	2019, 2021	200	74	126
Soil layer thickness	2019, 2020, 2021	300	107	193
Weathered rock layer thickness	2019, 2020, 2021	300	107	193
Bed rock layer thickness	2019, 2020, 2021	300	107	193
Number of major anomaly zones	2019, 2020, 2021	300	107	193