H31G-1520
Isotopic Analysis of Source Waters Contributing to a Submarine Spring in San Salvador, Bahamas
Wednesday, 16 December 2015
Poster Hall (Moscone South)
Alison Elizabeth DeVivero, Organization Not Listed, Washington, DC, United States, Jeremy C Stalker, Jacksonville University, Biology and Marine Science, Jacksonville, FL, United States and Peter K Swart, University of Miami, Department of Marine Geosciences - RSMAS, Miami, FL, United States
Abstract:
Submarine groundwater discharge supplies coastlines with a source of fresh, nutrient-rich water. The connection between inland fresh/brackish waters and submarine springs is unknown on San Salvador, Bahamas. A submarine spring within the Cockburntown formation outcrop at Grotto Beach has been identified. In May 2014, a Hobo sonde was placed within the vent for 24 hours collecting conductivity and temperature data. Analysis concluded the springs salinity was at its lowest of 23.9 psu (practical salinity units) at low tide and highest of 29.4 psu at high tide. During May 2015, multiple water samples were collected from the spring vent and 9 surrounding inland water sources. These water sources include fresh and brackish blue holes, and preexisting man-made wells. Analysis of hydrogen and oxygen isotopes gives insight to the conduit connections and source waters of the submarine spring.
