Rethinking the Water Leak Incident of Tunnel LUO09 to Prepare for a Challenging Future

Table 1

Details for the monitoring instruments used in the pumping test.

Location	Well type	Instrument no.	Depth (m)
Inside the diaphragm wall	Observation well	OW-S1	40
	Observation well	OW-S2	45
	Observation well	OW-02	45
	Observation well	OW-04	45
	Observation well	OW-08	45
	Observation well	OW-10	45
Outside the diaphragm wall	Observation well	OW-14	40