Evaluation of the Influence Caused by Tunnel Construction on Groundwater Environment: A Case Study of Tongluoshan Tunnel, China

Table 5

Membership of each indictor at every level calculated from quantification of Tongluoshan tunnel and the evaluation criteria.

Indicator	Grades
	Very weak	Weak	Moderate	Strong	Very strong
[C11] average annual rainfall (mm)	0	0	0.211	0.789	0
[C12] average annual evaporation (mm)	0.288	0.712	0	0	0
[C13] area of catchment zone (km^2)	0	0	0.080	0.920	0
[C14] coefficient of rainfall infiltration	0.158	0.146	0.256	0.330	0.110
[C15] spatial relationship between the tunnel and geomorphology	0.600	0	0	0.400	0
[C16] capacities of reservoirs and lakes on the ground (m^3)	0	0	1.000	0	0
[C17] flow of surface rivers (m^3/s)	0	1.000	0	0	0
[C21] carbonate rocks exposure ratio (%)	0	0.800	0.200	0	0
[C22] water yield property of aquifers	0.624	0	0.301	0	0.075
[C23] water pressure on the tunnel (Mpa)	0	0.800	0.200	0	0
[C24] development of folds	0	0	0	1.000	0
[C25] development of fracture zones	0	0	1.000	0	0
[C26] formation lithology	0.210	0.350	0	0	0.440
[C27] location of tunnel in horizontal and vertical hydrodynamic zoning of groundwater	0	0	0	1.000	0
[C31] length of tunnel (km)	0	0.289	0.711	0	0
[C32] area of disturbed range (m^2)	0	0	1.000	0	0
[C33] construction method	0	0	0	0.200	0.800
[C34] burial depth of tunnel (m)	0	0	1.000	0	0
[C35] measures for prevention of groundwater flowing into tunnel	0.200	0	0.800	0	0