Research Article

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.

Very weakWeakModerateStrongVery strong

[C11] average annual rainfall (mm)000.2110.7890
[C12] average annual evaporation (mm)0.2880.712000
[C13] area of catchment zone (km2)000.0800.9200
[C14] coefficient of rainfall infiltration0.1580.1460.2560.3300.110
[C15] spatial relationship between the tunnel and geomorphology0.600000.4000
[C16] capacities of reservoirs and lakes on the ground (m3)001.00000
[C17] flow of surface rivers (m3/s)01.000000
[C21] carbonate rocks exposure ratio (%)00.8000.20000
[C22] water yield property of aquifers0.62400.30100.075
[C23] water pressure on the tunnel (Mpa)00.8000.20000
[C24] development of folds0001.0000
[C25] development of fracture zones001.00000
[C26] formation lithology0.2100.350000.440
[C27] location of tunnel in horizontal and vertical hydrodynamic zoning of groundwater0001.0000
[C31] length of tunnel (km)00.2890.71100
[C32] area of disturbed range (m2)001.00000
[C33] construction method0000.2000.800
[C34] burial depth of tunnel (m)001.00000
[C35] measures for prevention of groundwater flowing into tunnel0.20000.80000