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Page 4184, results 104576 - 104600

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Quaternary geologic map of the Mobile 4 degrees x 6 degrees quadrangle, United States
K.F. Rheams, T.L. Neathery, W. A. Gilliland, Walter Schmidt, W.C. Clark Jr., D. E. Pope, David S. Fullerton, David L. Weide, Charles A. Bush
Gerald M. Richmond, editor(s)
1988, IMAP 1420(NH-16)
This map is part of the Quaternary Geologic Atlas of the United States (I-1420). It was first published as a printed edition in 1988. The geologic data have now been captured digitally and are presented here along with images of the printed map sheet and component parts as PDF files. The...
Volatilization of benzene and eight alkyl-substituted benzene compounds from water
R. E. Rathbun, D. Y. Tai
1988, Water Supply Paper 2342
Predicting the fate of organic compounds in streams and rivers often requires knowledge of the volatilization characteristics of the compounds. The reference-substance concept, involving laboratory-determined ratios of the liquid-film coefficients for volatilization of the organic compounds to the liquid-film coefficient for oxygen absorption, is used to predict liquid-film coefficients for...
Dissolved silica in the tidal Potomac River and Estuary, 1979-81 water years
Stephen F. Blanchard
1988, Water Supply Paper 2234-H
The Potomac River at Chain Bridge is the major riverine source of dissolved silica (DSi) to the tidal Potomac River and Estuary. DSi concentrations at Chain Bridge are positively correlated with river discharge; river discharge is an important factor controlling rates of supply, dilution, and residence time. When river flow...
Hydrology and ecology of the Apalachicola River, Florida : a summary of the river quality assessment
John F. Elder, Sherron D. Flagg, Harold C. Mattraw Jr.
1988, Water Supply Paper 2196-D
During 1979-81, the U.S. Geological Survey conducted a large-scale study of the Apalachicola River in northwest Florida, the largest and one of the most economically important rivers in the State. Termed the Apalachicola River Quality Assessment, the study emphasized interrelations among hydrodynamics, the flood-plain forest, and the nutrient-detritus flow through...
Evaluation of the ground-water resources of the lower Susquehanna River basin, Pennsylvania and Maryland
James M. Gerhart, George J. Lazorchick
1988, Water Supply Paper 2284
Ground water in the 3,458-square-mile lower Susquehanna River basin occupies secondary openings in bedrock. The distribution of openings is a function of lithology, depth, and topography. Local flow systems account for most of the total ground-water flow. Average annual recharge for the lower basin is 1,857 million gallons per day,...
Bottom sediments and nutrients in the tidal Potomac system, Maryland and Virginia
Jerry L. Glenn
1988, Water Supply Paper 2234-F
The characteristics and distributions of near-surface bottom sediments and of nutrients in the sediments provide information on modern sediment and nutrient sources, sedimentation environments, and geochemical reactions in the tidal Potomac system, Maryland and Virginia. This information is fundamental to an improved understanding of sedimentation and eutrophication problems in the...
Leachate migration from an in-situ oil-shale retort near Rock Springs, Wyoming
Kent C. Glover
1988, Water Supply Paper 2322
Hydrogeologic factors influencing leachate movement from an in-situ oil-shale retort near Rock Springs, Wyoming, were investigated through models of ground-water flow and solute transport. Leachate, indicated by the conservative ion thiocyanate, has been observed ? mile downgradient from the retort. The contaminated aquifer is part of the Green River Formation...
Effect of water quality on survival of Lahontan cutthroat trout eggs in the Truckee River, west-central Nevada and eastern California
Ray J. Hoffman, Gary G. Scoppettone
1988, Water Supply Paper 2319
The U.S. Fish and Wildlife Service has an ongoing program to assess the feasibility of reestablishing naturally spawning populations of Lahontan cutthroat trout in the Truckee River-Pyramid Lake system in Nevada. Previous in situ egg-survival studies have documented a 100 percent mortality of cutthroat trout eggs artificially planted in potential...
Application of the two-film model to the volatilization of acetone and t-butyl alcohol from water as a function of temperature
R. E. Rathbun, D. Y. Tai
1988, Water Supply Paper 2318
The two-film model is often used to describe the volatilization of organic substances from water. This model assumes uniformly mixed water and air phases separated by thin films of water and air in which mass transfer is by molecular diffusion. Mass-transfer coefficients for the films, commonly called film coefficients, are...
Quantitative assessment of the shallow ground-water flow system associated with Connetquot Brook, Long Island, New York
Keith R. Prince, O. Lehn Franke, Thomas E. Reilly
1988, Water Supply Paper 2309
Streamflow on Long Island is derived principally from shallow ground water that flows above the deeper regional flow system. The movement of shallow ground water was studied during 1975-82 at Connetquot Brook, an undisturbed stream in Connetquot River State Park, in south-central Long Island, New York. The investigation encompassed (1)...
Tritium migration from a low-level radioactive-waste disposal site near Chicago, Illinois
J.R. Nicholas, R. W. Healy
1988, Water Supply Paper 2333
This paper describes the results of a study to determine the geologic and hydrologic factors that control migration of tritium from a closed, low-level radioactive-waste disposal site. The disposal site, which operated from 1943 to mid1949, contains waste generated by research activities at the world's first nuclear reactors. Tritium has...
Simulation of flow in the Edwards Aquifer, San Antonio region, Texas, and refinement of storage and flow concepts
Robert W. Maclay, Larry F. Land
1988, Water Supply Paper 2336-A
The Edwards aquifer is a complexly faulted, carbonate aquifer lying within the Balcones fault zone of south-central Texas. The aquifer consists of thin- to massive-bedded limestone and dolomite, most of which is in the form of mudstones and wackestones. Well-developed secondary porosity has formed in association with former erosional surfaces...
Specific conductance; theoretical considerations and application to analytical quality control
Ronald L. Miller, Wesley L. Bradford, Norman E. Peters
1988, Water Supply Paper 2311
This report considers several theoretical aspects and practical applications of specific conductance to the study of natural waters. A review of accepted measurements of conductivity of secondary standard 0.01 N KCl solution suggests that a widely used algorithm for predicting the temperature variation in conductivity is in error. A new...