Radon groundwater monitoring at underground laboratories of Gran Sasso (Italy)

An automatic multiparametric equipment (groundwater temperature, electrical conductivity, pH. - Rn) has been planned and realized to study thee correlations between the variations of radon with the strain processes of the rock and transport properties related to the groundwater geochemistry. The monitoring activity at underground laboratories of Gran Sasso with a groundwater sampling period of twelve hours has been started from May 1996. From geochemical data recorded during the first year a high dynamic behaviour of shallow aquifer has been emphasized due to high permeability of the cretaceous limestones that form part of the Gran Sasso massif. Also, the residual time series analysis of the geochemical parameters has emphasised pre-co seismic in randon current in groundwater related to local seismicity