Calculation of Subgrade Moisture Index in Seasonally Frozen Regions considering Evapotranspiration at Subzero Temperatures and the Pavement Coverage Effect

Table 6

PE values for different soil types in Zone II₁ (cm).

Month	Meteorological station
	Suifenhe (SFH)	Mudanjiang (MDJ)	Jixi (JX)	Linjiang (LJ)	Yanji (YJ)	Dandong (DD)	Benxi (BX)
1	1.05	0.75	1.02	0.69	1.37	2.47	1.42
2	1.62	1.47	1.74	1.49	2.21	3.33	2.34
3	4.01	4.36	4.55	4.20	4.97	5.64	5.47
4	7.90	8.51	8.78	7.85	8.55	8.33	10.04
5	11.03	12.24	12.75	10.77	11.76	10.93	13.26
6	10.40	12.27	12.37	11.35	10.91	11.12	13.29
7	10.97	12.55	12.72	11.56	11.44	10.40	12.32
8	9.63	10.70	10.70	10.00	10.25	10.74	10.93
9	6.80	7.31	7.64	6.61	7.03	8.70	8.27
10	5.04	4.61	5.28	4.20	6.36	6.26	5.74
11	2.33	1.93	2.30	1.71	2.44	3.65	2.75
12	1.19	0.80	1.07	0.70	1.40	2.47	1.55
Total PE at subzero temperature	10.20	9.32	10.68	8.80	12.39	8.27	10.78
Total PE at mean annual temperature	71.97	77.50	80.93	71.14	78.69	84.03	87.37
Proportion of PE at subzero temperature (%)	14.2	12.0	13.2	12.4	15.7	9.8	12.3