Publications
Publications intro.
Filter Total Items: 450
Documentation of hydrochemical-facies data and ranges of dissolved-solids concentrations for the northern Atlantic Coastal Plain aquifer system, New Jersey, Delaware, Maryland, Virginia and North Carolina supplement to Professional paper 1404-L
Hydrochemical-facies data and ranges of dissolved- solids concentrations used to construct hydrochemical-facies maps and sections for U.S. Geological Survey Professional Paper 1404-L have not been previously published. In this report, the data are contained on a 3-1/2 high-density diskette in a file presented in American International Standard Code for Information Exchange (ASCII) format. The file
Authors
Harold Meisler, L. L. Knobel
Water resources data Maryland and Delaware, water year 1994, Volume 2: Ground-water data
No abstract available.
Authors
M.J. Smigaj, R.W. Saffer, J.L. Tegeler
Water resources data Maryland and Delaware, water year 1994, Volume 1. Surface-water data
No abstract available.
Authors
R.W. James, R.H. Simmons, B.F. Strain
The role of epiphytes in seagrass production and survival: Microcosm studies and simulation modeling
No abstract available.
Authors
Hilary A. Neckles
Chlorofluorocarbons (CCl3F and CCl2F2) as dating tools and hydrologic tracers in shallow groundwater of the Delmarva Peninsula, Atlantic Coastal Plain, United States
Concentrations of the Chlorofluorocarbons (CFCs) CFC-11 and CFC-12 were determined in groundwater from coastal plain sediments of the Delmarva Peninsula. CFC-modeled ages were calculated independently for CFC-11 and CFC-12, and agreed to within 2–3 years in the majority of the waters. Recharge temperatures, determined from dissolved nitrogen and argon concentrations, varied from 9±2°C over most of
Authors
S.A. Dunkle, Niel Plummer, E. Busenberg, P. J. Phillips, J. M. Denver, P. A. Hamilton, R. L. Michel, T. B. Coplen
Sampling colloids and colloid-associated contaminants in ground water
It has recently been recognized that mobile colloids may affect the transport of contaminants in ground water. To determine the significance of this process, knowledge of both the total mobile load (dissolved + colloid-associated) and the dissolved concentration of a ground-water contaminant must be obtained. Additional information regarding mobile colloid characteristics and concentrations are re
Authors
Debera A. Backhus, Joseph N. Ryan, Daniel M. Groher, John K. MacFarlane, Philip M. Gschwend
Water resources data Maryland and Delaware, water year 1993, Volume 2: Ground-water data
No abstract available.
Authors
M.J. Smigaj, R.W. Saffer, J.L. Tegeler
Water resources data Maryland and Delaware, water year 1993, Volume 1. Surface-water data
No abstract available.
Authors
R.W. James, R.H. Simmons, B.F. Strain
Sensitivity of water resources in the Delaware River basin to climate variability and change
Because of the "greenhouse effect," projected increases in atmospheric carbon dioxide levels might cause global warming, which in turn could result in changes in precipitation patterns and evapotranspiration and in increases in sea level. This report describes the greenhouse effect; discusses the problems and uncertainties associated with the detection, prediction, and effects of climatic change,
Authors
Mark A. Ayers, David M. Wolock, Gregory J. McCabe, Lauren E. Hay, Gary D. Tasker
Geohydrology and simulation of ground-water flow in the Red Clay Creek Basin, Chester County, Pennsylvania, and New Castle County, Delaware
The 54-square-mile Red Clay Creek Basin, located in the lower Delaware River Basin, is underlain primarily by metamorphic rocks that range from Precambrian to Lower Paleozoic in age. Ground water flows through secondary openings in fractured crystalline rock and through primary openings below the water table in the overlying saprolite. Secondary porosity and permeability vary with hydrogeologic un
Authors
Karen L. Vogel, Andrew G. Reif
Water-quality assessment of the Delmarva Peninsula, Delaware, Maryland, and Virginia--Effects of agricultural activities on, and distribution of, nitrate and other inorganic constituents in the surficial aquifer
Agricultural applications of inorganic fertilizers and manure have changed the natural chemical com- position of water in the surficial aquifer through- out the Delmarva Peninsula. Nitrate, derived from nitrification of ammonia in inorganic fertilizers and manure, is the dominant anion in agricultural areas. Concentrations of nitrate in 185 water samples collected in agricultural areas ranged from
Authors
P. A. Hamilton, J. M. Denver, P. J. Phillips, R. J. Shedlock