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Summary Information for Field Activity 2006-018-FA

Area of Operations: Maryland, Potomac River estuary, Chesapeake Bay, United States, North America, North Atlantic

Dates: September 05, 2006 to September 09, 2006

Chief scientist: John Bratton

Objectives: Reconnaissance-level surveying of submarine groundwater discharge indicators in lower Potomac River Estuary and western shore of Chesapeake Bay.

Type of Activity: Sampling; Seismic profiling; Electrical resistivity surveying; Radon mapping;Electrical resistivity surveying
radon mapping

Information to be derived: Seismic profiles
resistivity profiles
radon activity time series and activity maps
continuous salinity and temperature data (surface water and profiles)
radium samples
groundwater samples

Summary: 4 September, Bratton drives gear down from Woods Hole and Crusius flies down to scout area; 5 September, Worley, Foster, Erban arrive in Solomons, set up gear on boat, troubleshoot; 6 September, seismics/CRP/radon mapping from mouth of Patuxent River into Potomac River and St. Mary's River to Dennis Pt. Marina (lines #1-6), set up RAD7 and YSI for radon time series at marina, PM Cross arrives; September 7, surveys with all systems up Maryland shore of Potomac mainstem and zigzag back downstream (lines # 7-19); September 8, surveys with all systems up part of MD shore and mostly VA shore with final crossing back north (lines # 20-26), transit back to Solomons with 5 mid-channel (Potomac) radium samples and YSI profiles, demobe gear from boat; September 9, Crusius and Bratton back to Dennis Pt. Marina in AM to collect time-series gear and four groundwater samples, others head to airport, later Crusius to airport and Bratton drives pickup and trailer with gear back to Woods Hole.

Contact: John Bratton (

InfoBank: uses the identifier K-1-06-CH. Visit this site for more information.

Related Links:

Platform Info:

Publications resulting from these data

Bratton, J.F.,2007, The importance of shallow confining units to submarine groundwater flow, in Sanford, W., Langevin, C., Polemio, M., and Povinec, P., eds., A New Focus on Groundwater-Seawater Interactions: International Association of Hydrological Sciences, v. 312: p. 28-36

Bratton, John F.,2010, The three scales of submarine groundwater flow and discharge across passive continental margins: The Journal of Geology, v. 118, no. 5: p. 565-575. (Also available at

Cross, V.A., Foster, D.S., and Bratton, J.F.,2010, Continuous resistivity profiling and seismic-reflection data collected in 2006 from the Potomac River estuary, Virginia and Maryland: U.S. Geological Survey Open-File Report 2009-1151. (Also available at

Data Types and Locations:


Raw seismic data


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