Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
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Water resources data, Iowa, water year 1995 Water resources data, Iowa, water year 1995
No abstract available.
Authors
J.E. May, J.G. Gorman, R.D. Goodrich, M.W. Bobier, V.E. Miller
Floods of July 12, 1972, March 19, 1979, and June 15, 1991, in the Turkey River Basin, northeast Iowa Floods of July 12, 1972, March 19, 1979, and June 15, 1991, in the Turkey River Basin, northeast Iowa
Water-surface-elevation profiles and peak discharges for the floods of July 12, 1972, March 19, 1979, and June 15, 1991, in the Turkey River Basin, northeast Iowa, are presented in this report. The profiles illustrate the 1979 and 1991 floods along the Turkey River in Fayette and Clayton Counties and along the Volga River in Clayton County; the 1991 flood along Roberts Creek in Clayton...
Authors
D. A. Eash, B.A. Koppensteiner
A two-step experimental design for a sediment bioassay using growth of the amphipod Hyalella azteca for the test end point A two-step experimental design for a sediment bioassay using growth of the amphipod Hyalella azteca for the test end point
We designed a sediment bioassay using 25% growth inhibition of Hyalella azteca as the end point.Hyalella azteca exhibits size-specific fecundity, so growth is a surrogate of reproductive production. We investigated density effects on growth to address whether crowding could affect test interpretation; amphipods in 14,000/m2 exposures were 16 to 20% smaller than those at 7,000/m2. Using...
Authors
Jody A. Kubitz, John M. Besser, John P. Giesy
A field investigation of the relationship between zinc and acid volatile sulfide concentrations in freshwater sediments A field investigation of the relationship between zinc and acid volatile sulfide concentrations in freshwater sediments
Understanding relationships between cationic metals such as cadmium, copper, nickel, lead and zinc, and amorphous iron sulfides, measured as acid volatile sulfide (AVS), is key to predicting metal bioavailability and toxicity insediments. The objective of the present study was to assess seasonal and spatial variations of AVS in freshwater sediments contaminated with zinc. Sediments were...
Authors
Gerald T. Ankley, Karsten Liber, Daniel J. Call, Thomas P. Markee, Timothy J. Canfield, Christopher G. Ingersoll
Species richness and biogeography of the herpetophauna in the Exuma Cays Land and Sea Park, Bahamas Species richness and biogeography of the herpetophauna in the Exuma Cays Land and Sea Park, Bahamas
Abstract not supplied at this time
Authors
C.K. Dodd, R. Franz
Estimates of abundance of box turtles (Terrapene carolina bauri) on a Florida island Estimates of abundance of box turtles (Terrapene carolina bauri) on a Florida island
Abstract not supplied at this time
Authors
C.A. Langtimm, C.K. Dodd, R. Franz
Denitrification in a South Louisiana wetland forest receiving treated sewage effluent Denitrification in a South Louisiana wetland forest receiving treated sewage effluent
Although denitrification has the potential to reduce nitrate (NO3a??) pollution of surface waters, the quantification of denitrification rates is complex because it requires differentiation from other mechanisms and is highly variable in both space and time. This study first measured potential denitrification rates at a wetland forest site in south Louisiana before receipt of secondary...
Authors
R.G. Boustany, C.R. Crozier, J.M. Rybczyk, R.R. Twilley
Observed and simulated movement of bank-storage water Observed and simulated movement of bank-storage water
Detailed hydrologic and water-chemistry data were collected that document the movement of bank-storage water during March 7-April 17, 1990, in an alluvial aquifer adjacent to the Cedar River, Iowa. Hydrologic data included 745 daily ground-water-level measurements from 27 observation wells. Water-chemistry data indicate that bank-storage water had smaller specific conductance and larger
Authors
P. J. Squillace
Indirect effects: Concepts and approaches from ecological theory Indirect effects: Concepts and approaches from ecological theory
Abstract not supplied at this time
Authors
D.L. DeAngeis
Hazard ranking of contaminated sediments based on chemical analysis, laboratory toxicity tests, and benthic community composition: Prioritizing sites for remedial action Hazard ranking of contaminated sediments based on chemical analysis, laboratory toxicity tests, and benthic community composition: Prioritizing sites for remedial action
The U.S. Environmental Protection Agency (U.S. EPA) organized a research program to assess the extent of and possible methods for managing contaminated sediments. As part of this program, we developed a method by which multiple forms of information on sediment contamination (i.e., chemistry, laboratory toxicity, and benthic community composition) could be combined to rank the relative...
Authors
Mark L. Wildhaber, Christopher J. Schmitt
Calculation and evaluation of sediment effect concentrations for the amphipod Hyalella azteca and the midge Chironomus riparius Calculation and evaluation of sediment effect concentrations for the amphipod Hyalella azteca and the midge Chironomus riparius
Procedures are described for calculating and evaluating sediment effect concentrations (SECs) using laboratory data on the toxicity of contaminants associated with field-collected sediment to the amphipod Hyalella azteca and the midge Chironomus riparius. SECs are defined as the concentrations of individual contaminants in sediment below which toxicity is rarely observed and above which...
Authors
Christopher G. Ingersoll, Pamela S. Haverland, Eric L. Brunson, Timothy J. Canfield, F. James Dwyer, Chris Henke, Nile E. Kemble, David R. Mount, Richard G. Fox
Biological assessment of the commercial mussel resources in Kentucky and Barkley Lakes, Kentucky. Final Report to Kentucky Dept. Fish and Wildlife Resources. No. 1 Game Farm Road Biological assessment of the commercial mussel resources in Kentucky and Barkley Lakes, Kentucky. Final Report to Kentucky Dept. Fish and Wildlife Resources. No. 1 Game Farm Road
Abstract not supplied at this time
Authors
James B. Sickel, J.J. Herod, H.N. Blalock