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

Table 9

Prediction of groundwater depth in Yinchuan Plain (unit: m).

Month	Year		Month	Year
	2019	2020		2019	2020
1	2.60	3.04	7	2.60	3.12
2	2.86	3.12	8	2.23	2.65
3	3.19	3.53	9	3.24	4.37
4	3.44	3.92	10	3.10	3.40
5	3.76	4.40	11	3.42	3.74
6	2.79	3.30	12	2.22	2.65