Limit Drainage of Separated Tunnel Based on Ecological Groundwater Table: A Case Study

Table 4

Relationship between groundwater table and vegetation growth.

Kinds of groundwater table	Depth to groundwater (m)
Saline buried depth	0–1
The best buried depth of groundwater table	1–3
Buried depth of groundwater to bear for trees and shrubs	3–5
Buried depth of groundwater to warn	5–8
Buried depth of groundwater to decline for trees	8–12
Buried depth of groundwater to wither for trees	>12