Research on Freight Development of Guangdong Province Based on Grey Theory Model

Table 10

COVID-19’s impact of freight development in Guangdong Province (unit: million ton; %).

Month	Water freight volume			Air cargo volume			Pipeline freight volume
	Actual value	Predictive value	Impact degree	Actual value	Predictive value	Impact degree	Actual value	Predictive value	Impact degree
Jan	78.540	93.318	−15.836	0.190	0.191	−0.493	8.340	8.361	−0.248
Feb	53.020	77.100	−31.232	0.110	0.162	−32.011	6.080	7.556	−19.533
Mar	76.200	88.529	−13.926	0.180	0.192	−6.308	8.230	8.467	−2.798
Apr	82.360	94.757	−13.083	0.180	0.199	−9.662	8.640	8.549	1.065
May	91.330	96.785	−5.636	0.200	0.206	−3.105	8.390	8.575	−2.161
Jun	87.890	98.840	−11.079	0.210	0.206	2.087	9.410	8.628	9.068
Jul	86.630	98.033	−11.632	0.200	0.210	−4.591	8.410	8.677	−3.075
Aug	95.000	97.869	−2.932	0.200	0.210	−4.593	12.140	9.098	33.432
Sep	94.440	101.925	−7.344	0.240	0.215	11.745	11.200	8.936	25.332
Oct	93.680	103.560	−9.540	0.220	0.221	−0.367	11.750	8.893	32.131
Nov	99.080	108.343	−8.550	0.220	0.227	−2.994	13.180	9.007	46.332
Dec	98.400	109.513	−10.148	0.230	0.237	−3.017	11.580	9.051	27.948
Total impact	1036.570	1168.572	−11.296	2.380	2.475	−3.838	117.350	103.797	13.057

Source: according to the calculation criteria.