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Fieldwork

Groundwater Discharge to Delmarva Coastal Bays: CMG, WRD, and Surface Processes Hoverprobe Team Conduct First Open-Water Surveys


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deploying the Hoverprobe
Deploying the Hoverprobe.
In early June, the Coastal and Marine Geology (CMG) cooperative groundwater project in the Delmarva Peninsula deployed a Hoverprobe near Public Landing in Chincoteague Bay, MD. The objective was to test Hoverprobe's ability to core, pump and log sub-bay strata to test for submarine discharge of fresh water.

Fresh interstitial waters were found a few meters below the bay floor from 120 to ~400 m from shore. A marsh core was also obtained from Assateague Island, MD.

Participants were Frank Manheim and Jerome Palmer (student assistant, Reston); John Bratton (Woods Hole), Dave Krantz (WRD Dover, DE), Dan Phelan (WRD Baltimore), and Mike Herder (contract driller, Eastern Region Surface Processes Team). Bill Ullman (University of Delaware, Lewes) cooperated with nutrient analyses. Visiting the activities were Bob Shedlock (WRD Baltimore), Kathy Wazniak (Maryland Department of Natural Resources), and Brian Sturges (National Park Service, Assateague Island).

map of survey area—Delaware/Maryland coastline

Hoverprobe is not only able to move on land and water, but also incorporates a highly effective vibra-drilling tool that can recover nearly undisturbed sediments to a depth of more than 15 m. Hoverprobe also accommodates a screened well-point pumping system able to recover large amounts of formation fluids. Drawing in part on the success of the previous resistivity surveys and coring results, a groundwater proposal has been submitted by WRD (Dover and Baltimore) to the Office of Ground Water for larger-scale groundwater studies in the Spring of 2001.

Below: The Hoverprobe in action.
Hoverprobe photo   Hoverprobe photo


Mike Herder and Dan Phelan conduct pumping test
Mike Herder and Dan Phelan conduct pumping test.
core and resistivity equipment
Core and resistivity equipment.



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in this issue: Fieldwork Delmarva Coastal Bays—Hoverprobe

Outreach cover story:
St. Pete Open House

Cub Scouts

JC Students Visit St. Pete

Teachers Learn About Rocks

Chesapeake Bay—Dartmouth College

Meetings Seafloor Mapping

Leadership in Scientific Research

British Antarctic Survey

Awards FWS, USGS Honored for Restoring Refuge

Student Achievement Awards

ECO Photo Contest

ESRI 2000 Conference

Staff & Center News Expert Witnesses at Environmental Trial

Two Long-Time Geologists Retire

Publications November Publications List


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Updated April 15, 2014 @ 01:53 PM (THF)