A Grey Seasonal Index Model for Forecasting Groundwater Depth of Ningxia Plain

Table 13

The fitting value and prediction value of groundwater depth in Weining Plain (unit: m).

Month	Fitting value					Prediction value
	2014	2015	2016	2017	2018	2019	2020
1	2.12	2.37	1.89	1.85	1.95	2.14	2.39
2	2.07	2.11	2.08	2.13	2.18	2.24	2.30
3	2.14	2.15	2.14	2.22	2.31	2.41	2.51
4	2.18	2.13	2.11	2.18	2.27	2.37	2.47
5	2.07	2.11	2.04	2.09	2.17	2.27	2.40
6	1.56	1.78	1.40	1.54	1.84	2.28	2.89
7	1.36	1.40	1.15	1.26	1.50	1.84	2.31
8	1.27	1.24	0.97	1.17	1.53	2.04	2.78
9	1.40	1.25	1.19	1.34	1.61	2.00	2.52
10	1.43	1.89	1.88	1.85	1.83	1.82	1.83
11	1.84	2.10	2.03	2.00	1.97	1.96	1.95
12	1.79	1.27	1.25	1.31	1.40	1.51	1.65
MAPE	2.26