USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 2006-018-FA

Other ID: none

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): John Bratton

Affiliate Investigator(s):

Information Specialist(s): John Bratton

Data Type(s): Environmental Data: Radon, Seismics: Sub Bottom Profiler, Location-Elevation: Navigation

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


Start Date: 2006-09-05

Start Port/Location: Solomons, MD

End Date: 2006-09-09

End Port/Location: Solomons, MD

Equipment Used: RAD7 radon detection instrument, Knudsen 1600 USB 1.2 kW with 2 Massa transducers (3.5 kHz), DGPS

Information to be Derived:

Summary of Activity and Data Gathered: 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.

Staff: John Bratton, VeeAnn Atnipp Cross, John Crusius, Laura Erban, David Foster, Charles Worley

Affiliate Staff:
Joya Blix
first mate

Notes: Additional cruise on Chesapeake Eastern Shore likely in summer 2007. Original Center People field contained: John Bratton, Co-chief scientist; John Crusius, Co-chief scientist; VeeAnn Cross, navigation; Chuck Worley, electrical resistivity; Dave Foster, seismics; Laura Erban, contract geochem tech.
Project = Coastal Groundwater Systems, Coastal Groundwater Systems


Maryland, Potomac River estuary, Chesapeake Bay, United States, North America, North Atlantic;

North: 39 South: 37 West: -77.5 East: -75.5


photo of Kerhin


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.

Bratton, J.F., 2010, The three scales of submarine groundwater flow and discharge across passive continental margins: The Journal of Geology, v. 118 no. 5, doi: 10.1086/655114.

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: URL:

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
RAD7 radon detection instrument --- Radon
2006-018-FA-NL-002 ( CD ROM disk of CHES POTOMAC, FIELD RADON, )
Knudsen 1600 USB 1.2 kW with 2 Massa transducers (3.5 kHz) --- Sub Bottom Profiler
SEGY seismic data ( )
2006-018-FA-SE-001 ( Raw seismic data)
DGPS --- Navigation
Nav data ( )