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DGS Annual Report

DGS Annual Report of Programs and Activities.

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Site content related to keyword: "Sussex County"

DGS releases new geologic map of Georgetown area

The Delaware Geological Survey (DGS) has published a new geologic map of the Georgetown area in eastern Sussex County entitled Geologic Map of the Georgetown Quadrangle, Delaware. Geologic Map No. 15 presents the results of research by Kelvin W. Ramsey of the DGS.

DGS issues report on the surficial geology of southern Delaware

Report of Investigation 76

The Delaware Geological Survey (DGS) has released a new technical report entitled Stratigraphy, Correlation, and Depositional Environments of the Middle to Late Pleistocene Interglacial Deposits of Southern Delaware.

GM15 Geologic Map of the Georgetown Quadrangle, Delaware

GM15 Geologic Map of the Georgetown Quadrangle, Delaware

The geologic history of the surficial geologic units of the Georgetown Quadrangle is primarily that of deposition of the Beaverdam Formation and its subsequent modification by erosion and deposition of younger stratigraphic units. The age of the Beaverdam Formation is uncertain due to the lack of age-definitive fossils within the unit. Stratigraphic relationships in Delaware indicate that it is no older than late Miocene and no younger than early Pleistocene. Regional correlations based on similarities of depositional style, stratigraphic position, and sediment textures suggest that it is likely late Pliocene in age; correlative with the Bacons Castle Formation of Virginia (Ramsey, 1992, 2010).

Stream Station: Millsboro Pond Outlet at Millsboro

USGS 01484525 MILLSBORO POND OUTLET AT MILLSBORO, DE

Station Type: 
Stream
Period of Record: 
May 1986 to September 1988; March 1991 to Present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.594556,-75.291028

Water Conditions Summary Station Map

Map displaying all observing stations monitored by DGS for current and long-term conditions as part of the Water Conditions Summary for Delaware.

Groundwater Station: DGS Well Nc13-03

DGS Well Nc13-03

Station Type: 
Groundwater
Period of Record: 
1970 to present
Frequency: 
Quarterly
Map County: 
Sussex County
Map Location: 
38.825698, -75.615997

Presentation on land application of waste water

Scott Andres of the Delaware Geological Survey presented “Land application of wastewater” and participated in a panel discussion of land use effects on water resources at a forum sponsored by the Sussex County League of Women Voters in Georgetown, Del., Jan 13.
Also, Andres presented “Groundwater Resources and Ag Water Use in Delaware” at the irrigation session during Delaware Ag Week in Harrington, Del., Jan 20.

Meteorological Station: Greenwood

Greenwood Meterological Station

Station Type: 
Meteorological
Period of Record: 
1986 to present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.80706,-75.59132

Meteorological Station: City of Lewes

City of Lewes Meteorological Station

Station Type: 
Meteorological
Period of Record: 
1949 to Mar 2011
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.769555,-75.138527

Hydrogeologic Resources for Delaware

Brandywine Creek in Northern Delaware

Hydrogeologic data and information for Delaware. This includes the Water Conditions Report, groundwater well data, links to real-time data from DEOS and USGS, and other general information about Delaware's hydrogeology.

Groundwater Station: DGS Well Qe44-01

DGS Well Qe44-01

Station Type: 
Groundwater
Period of Record: 
1959 to Present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.527698,-75.433502

Groundwater Station: DGS Well Mc51-01a

DGS Well Mc51-01a

Station Type: 
Groundwater
Period of Record: 
1958 to Present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.845401,-75.665496

Meteorological Station: Town of Selbyville

Town of Selbyville Meterological Station

Station Type: 
Meteorological
Period of Record: 
1994 to Present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.466667,-75.216667

Meteorological Station: Georgetown Sussex County Airport

Georgetown NWS Meterological Station

Station Type: 
Meteorological
Period of Record: 
1949 to Present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.683333,-75.366667

Stream Station: Nanticoke River near Bridgeville

USGS 01487000 NANTICOKE RIVER NEAR BRIDGEVILLE, DE

Station Type: 
Stream
Period of Record: 
April 1943 to Present
Frequency: 
Monthly
Map County: 
Sussex County
Map Location: 
38.728333, -75.561861

Digital Water-Table Data for Sussex County, Delaware (Digital Data Product No. 05-01)

Digital Water-Table Data for Sussex County, Delaware

This digital product contains gridded estimates of water-table (wt) elevation and depth to water (dtw) under dry, normal, and wet conditions for Sussex County, Delaware. Files containing the point data used to create the grids are also included. This work is the final component of a larger effort to provide estimates of water-table elevations and depths to water for the Coastal Plain portion of Delaware. Mapping was supported by the Delaware Department of Natural Resources and Environmental Control and the Delaware Geological Survey.

These grids were produced with the same multiple linear regression (MLR) method as Andres and Martin (2005). Briefly, this method consists of: identifying dry, normal, and wet periods from long-term observation well data (Nc45-01, Ng11-01, Qe44-01); estimating a minimum water table (Sepulveda, 2002) by fitting a localized polynomial surface to elevations of surface water features (e.g., streams, swamps, and marshes); and computing a second variable in the regression from water levels observed in wells. A separate MLR equation was determined for dry, normal, and wet periods, and these equations were used in ArcMap v.9 (ESRI, 2004) to estimate grids of water-table elevations and depths to water. Grids produced in this project were merged with those previously completed for eastern Sussex and smoothed to minimize edge effects.