Scientific monitoring at Hay Slough study site At this study site in Hay Slough, we monitored the vertical temperature profile from the groundwater upwelling, through the water column, ice, snow, and into the air during 2011-2012 field season. Process Observed: Open WaterBeaversScientific MeasurementsTemperature Date Process Observed: Sunday, January 1, 2012 to Thursday, March 1, 2012 Galleries: Hay Slough Gallery