CJCZO -- Piezometer, Groundwater Depth -- Marshall Gulch -- (2007-2019)

30 minute groundwater depth data are derived from pressure measurements at 15 locations (7 at the granite site and 9 at the schist site) and corrected for barometric pressure measured at the schist site. Pressure is measured using Onset Hobo pressure transducers model U20 placed at the soil bedrock interface in vertical plastic tubes that were drilled into the soil.