A new technique to collect groundwater samples from submarine formations and its application to offshore Kurobe alluvial fan

Abstract

A new technique to collect groundwater samples from submarine formations was developed. This technique makes it possible to collect more than one liter of groundwater without any seawater contamination and is applicable in water depths of 0 to 40 m.
This technique was used at one submarine groundwater discharge site of offshore Kurobe alluvial fan. We confirmed that this technique worked, and we obtained more than one liter of water sample by single operation. Major ion chemistry and stable isotope data were very similar with that reported onshore Kurobe alluvial fan.