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

Table 4

Water quality evaluation results in the study area.

Sample number	value	Quality type	Sample number	value	Quality type	Sample number	value	Quality type
1-I	6.2	IV	3-IV	10.5	V	3-V	6.1	IV
2-I	3.1	III	4-IV	6.3	IV	4-V	6.1	IV
3-I	6.3	IV	5-IV	6.1	IV	5-V	6.1	IV
1-II	10.1	V	6-IV	6.2	IV	6-V	6.2	IV
2-II	3.0	III	7-IV	6.2	IV	7-V	6.2	IV
3-II	3.1	III	8-IV	6.1	IV	8-V	6.1	IV
4-II	6.1	IV	9-IV	10.3	V	9-V	6.0	IV
1-III	6.2	IV	10-IV	6.2	IV	10-V	6.2	IV
2-III	6.2	IV	11-IV	6.2	IV	S-I	3.0	III
3-III	6.2	IV	12-IV	6.2	IV	S-II	1.0	II
4-III	6.2	IV	13-IV	6.2	IV	S1-IV	6.1	IV
1-IV	10.5	V	1-V	6.1	IV	S2-IV	6.1	IV
2-IV	10.5	V	2-V	6.1	IV