- Project Case Study
Drilling and Monitoring
of Groundwater Quality – Geneva
Securing historical hydrological observations of the Arve aquifer near industrial areas with a newly executed 80m deep piezometer.
Critical Replacement of historical Arve Aquifer monitoring
The Geological Service of the State of Geneva requested DROPSTONE to drill a borehole in Carouge (Geneva) in order to replace a former one that was damaged with the years. The purpose of the work is to allow a continuous monitoring of the underground water quality.
The former borehole, used since 1976, was a historical site for observing the Arve aquifer in an area close to industrial sites. The Arve aquifers provides large amounts of drinking water to the canton of Geneva.
The challenges were to drill just near the Carouge tunnel and also to make minimal damages to the agricultural field, privately owned. The works lasted five intense days and were just successfully finalised last week.
The total thickness of the aquifer, constituted of gravel and sand, was drilled down to 80m, until reaching the basal impervious layer. The borehole has allowed confirming the geological hypothesis, known only indirectly through electricity surveys.
Project Specifications
Borehole & Quality Monitoring
Client
Geological Service of the State of Geneva (GESDEC)
Location
Carouge, Canton of Geneva, Switzerland
Borehole Depth
80 Metres (reaching basal impermeable layer)
Hydrogeological Target
Arve Aquifer (Gravel and Sand formations)
Focus Objective
Continuous monitoring of underground water quality close to industrial zones
Aquifer Safety
“The replacement of the historical 1976 station ensures continuous observation of drinking water corridors near critical industrial areas.”
