Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5582
Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87 Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87
Samples collected from wells in Carroll and Guthrie Counties, Iowa, were analyzed to describe the chemical quality of the ground water in shallow aquifers. The study began in June 1986 with the selection of 20 shallow wells in Carroll County and 22 shallow wells in Guthrie County. These wells were sampled in the summer and fall of 1986 and 1987. Samples from the wells were analyzed for...
Authors
M.G. Detroy, M. L. Clark, M.A. Holub, P.K. Hunt
National water summary 1987: Hydrologic events and water supply and use National water summary 1987: Hydrologic events and water supply and use
Water use in the United States, as measured by freshwater withdrawals in 1985, averaged 338,000 Mgal/d (million gallons per day), which is enough water to cover the 48 conterminous States to a depth of about 2.4 inches. Only 92,300 Mgal/d, or 27.3 percent of the water withdrawn, was consumptive use and thus lost to immediate further use; the remainder of the withdrawals (72.7 percent)...
By
Water Resources Mission Area, Water Availability and Use Science Program, Central Midwest Water Science Center, Dakota Water Science Center, Pennsylvania Water Science Center, Oklahoma-Texas Water Science Center, Utah Water Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Central Plains Water Science Center
A summary of water-resources activities of the U.S. Geological Survey in Iowa; fiscal year 1990 A summary of water-resources activities of the U.S. Geological Survey in Iowa; fiscal year 1990
Water resources activities of the U.S. Geological Survey in Iowa consist of collecting hydrologic data and conducting interpretive studies. Hydrologic investigations in Iowa are made through three basic types of projects: (1) hydrologic data-collection programs; (2) local or areal hydrologic studies; and (3) statewide or regional investigations. These projects are funded through...
An evaluation of bone growth- layer counts as an age-determination technique in Florida manatees An evaluation of bone growth- layer counts as an age-determination technique in Florida manatees
Abstract not supplied at this time
Authors
M. Marmontel, T. J. O'Shea, S.R. Humphrey
Manatee grazing impacts on seagrasses in Hobe Sound and Jupiter Sound in southeast Florida during the winter of 1988-1989 Manatee grazing impacts on seagrasses in Hobe Sound and Jupiter Sound in southeast Florida during the winter of 1988-1989
Abstract not supplied at this time
Authors
L.W. Lefebvre, J. A. Powell
Don't release exotic fish Don't release exotic fish
Abstract not supplied at this time
Authors
Dawn P. Jennings, J.D. Williams
Determination and occurrence of AHH-active polychlorinated biphenyls, 2,3,7,8-tetrachloro-p-dioxin and 2,3,7,8-tetrachlorodibenzofuran in Lake Michigan sediment and biota. The question of their relative toxicological significance Determination and occurrence of AHH-active polychlorinated biphenyls, 2,3,7,8-tetrachloro-p-dioxin and 2,3,7,8-tetrachlorodibenzofuran in Lake Michigan sediment and biota. The question of their relative toxicological significance
An analytical procedure has been developed for the determination of the 18 PCB congeners which are inducers of methylcholanthrene-like mixed function oxidase activity in animals and include the most toxic PCBs. Determinations of the toxic PCB congeners in samples of eggs of predatory fish and piscivorous birds of the Great Lakes and in Aroclor mixtures demonstrate that the apparent toxic...
Authors
Lawrence M. Smith, Ted R. Schwartz, Kevin Feltz, Timothy J. Kubiak
Encephalization quotients and life-history traits in the Sirenia Encephalization quotients and life-history traits in the Sirenia
Relative brain size in the Sirenia is unusually small. Encephalization quotients are 0.27 for Florida manatees (Trichechus manatus) and 0.38 for dugongs (Dugong dugon). Estimates for Steller's sea cow (Hydrodamalis gigas) range from 0.12 to 0.19. These values are among the lowest known for Recent mammals, and seemingly have changed little since the Eocene. A body plan specialized for the...
Authors
T. J. O'Shea, R.L. Reep
Reconnaissance surficial geologic map of the mountainous parts of Loudoun County, Virginia Reconnaissance surficial geologic map of the mountainous parts of Loudoun County, Virginia
No abstract available.
Authors
Robert B. Jacobson, R. C. McDowell, D.J. Milton, Wayne L. Newell, J. S. Pomeroy, J.S. Schindler, C.S. Southworth
National contaminant biomonitoring program: Residues of organochlorine chemicals in U.S. Freshwater Fish, 1976–1984 National contaminant biomonitoring program: Residues of organochlorine chemicals in U.S. Freshwater Fish, 1976–1984
The U.S. Fish and Wildlife Service periodically determines concentrations of organochlorine chemicals in freshwater fish collected from a nationwide network of stations as part of the National Contaminant Biomonitoring Program (NCBP, formerly a part of the National Pesticide Monitoring Program). From late 1984 to early 1985, a total of 321 composite fish samples were collected from 112...
Authors
Christopher J. Schmitt, Jim L. Zajicek, Paul H. Peterman
Wetland vegetation Wetland vegetation
No abstract available.
Authors
Glenn R. Guntenspergen, F. Stearns, J.A. Kadlec