Analysis of Hydrogeochemical Characteristics of Tunnel Groundwater Based on Multivariate Statistical Technology

Table 2

Evaluation score of single index and comprehensive evaluation score.

Class	I	II	III	IV	V
Evaluation score of single index	0	1	3	6	10
Comprehensive evaluation score	<0.80	0.80~2.50	2.50~4.25	4.25~7.20	>7.20