water resources

RI80 Investigation of Submarine Groundwater Discharge at Holts Landing State Park, Delaware: Hydrogeologic Framework, Groundwater Level and Salinity Observations

Monitoring wells and groundwater sensors were installed and monitored in and around Holts Landing State Park on the Indian River Bay, eastern Sussex County, Delaware, between October 2009 and August 2012. Data from test drilling, geophysical logging, geophysical surveys, and well testing characterized the hydrogeological framework and spatial and temporal patterns of water pressure, temperature, and salinity in the shallow, unconfined Columbia aquifer. The work revealed a plume of freshened groundwater extending more than 650 ft into the bay from the shoreline.

David Wunsch, Director and State Geologist of the Delaware Geological Survey (DGS) participated in AAAS Forum

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David Wunsch was selected to present at the AAAS 20x20 Forum, where current and alumni AAAS Science & Technology Policy Fellows present short, visual presentation on how science intersects with policy. Wunsch presented the role of the Delaware State Geologist serves as the Decree Party Principal for the state of Delaware in negotiations for water management in the Delaware River Basin. His presentation also relayed insights into New York City’s water supply, which depends heavily on water transferred from the Delaware River Basin.

Sharing groundwater expertise internationally - State Department taps UD’s Wunsch to attend South Asia Groundwater Forum

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David Wunsch, the state geologist for Delaware and director of the Delaware Geological Survey, served as a special consultant for the U.S. State Department at the South Asia Groundwater Forum in Jaipur, India, June 1-3.

The meeting, hosted by the government of India, in partnership with the World Bank and the International Water Association, brought together regional government and non-government stakeholders and experts from water, agriculture, energy and environmental sectors.

B21D Using Numerical Models to Assess a Rapid Infiltration Basin System (RIBS), Cape Henlopen State Park, Delaware

The long-term performance of rapid infiltration basin systems (RIBS) and their potential impacts on the receiving environment have been previously unknown for Delaware. A variety of field experiments were conducted to characterize the geology and hydrogeology of a RIBS facility that has been in operation for more than 20 years at Cape Henlopen State Park. Pairs of standard monitoring wells and short-screened multi-level wells were used to evaluate the significance of small-scale vertical variability in water quality.

Delaware Geological Survey Issues Report on Groundwater Monitoring and Water-Quality Impacts of Rapid Infiltration Basin Systems

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The Delaware Geological Survey released a new technical report entitled “Groundwater Quality and Monitoring of Rapid Infiltration Basin Systems, Theory and Field Experiments at Cape Henlopen State Park, Delaware” which was prepared by A. Scott Andres and Changming He of the Delaware Geological Survey, Edward Walther of the South Water Management District, Florida, Müserref Türkmen of the Izmir Water and Sewerage Administration, Turkey, and Anastasia Chirnside and William Ritter of the University of Delaware. DGS Bulletin 21C documents the results of a detailed study of groundwater quality at a rapid infiltration basin system.