Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5321
Comparison of solid-phase and pore-water approaches for assessing the quality of marine and estuarine sediments
As part of our continuing evaluation of the pore-water approach for assessing sediment quality, we made a series of side-by-side comparisons between the standard 10-day amphipod whole sediment test with the corophiid Grandidierella japonica and a suite of tests using pore water extracted from the same sediments. the pore-water tests evaluated were the sea urchin (Arbacia punctulata) sperm cell tes
Authors
Robert Scott Carr, Duane Chapman
A chemometric study of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in Great Lakes fish
No abstract available.
Authors
D.L. Stalling, T.R. Schwartz, D. S. De Vault, W. Dunn, S. Wold, P. Berggvist, K. Wiberg, C. Rappe
Hydrologic data for the Big Spring basin, Clayton County, Iowa, water year 1990
Hydrologic data were collected in the Big Spring basin located in Clayton County, Iowa, during the 1990 water year. The data were collected by the U.S. Geological Survey in cooperation with the Iowa Department of Natural Resources, Geological Survey Bureau, to provide information on variation and movement of agricultural chemicals in the hydrologic cycle in the basin. Precipitation, surface-water,
Authors
Stephen J. Kalkhoff, R.L. Kuzniar, D. Kolpin, C.A. Harvey
Evaluation of selected methods for determining streamflow during periods of ice effect
Seventeen methods for estimating ice-affected streamflow are evaluated for potential use with the U.S. Geological Survey streamflow-gaging station network. The methods evaluated were identified by written responses from U.S. Geological Survey field offices and by a comprehensive literature search. The methods selected and techniques used for applying the methods are described in this report. The m
Authors
Norwood B. Melcher, J.F. Walker
Disappearing coastal wetlands
No abstract available.
Authors
James B. Johnston, Donald W. Field, Anthony J. Reyer
Redistribution of soil nitrogen, carbon and organic matter by mechanical disturbance during whole-tree harvesting in northern hardwoods
To investigate whether mechanical mixing during harvesting could account for losses observed from forest floor, we measured surface disturbance on a 22 ha watershed that was whole-tree harvested. Surface soil on each 10 cm interval along 81, randomly placed transects was classified immediately after harvesting as mineral or organic, and as undisturbed, depressed, rutted, mounded, scarified, or sca
Authors
D.F. Ryan, Thomas G. Huntington, Martin C. Wayne
Herbicide transport in rivers: Importance of hydrology and geochemistry in nonpoint-source contamination
Alachlor, atrazine, cyanazine, metolachlor, and metribuzin were measured at six sites during 1984 and 1985 in large subbasins within the Cedar River, IA. A computer model separated the Cedar River discharge hydrograph into groundwater and overland-flow components. The concentration of herbicides in the river when groundwater was the major flow component was less than 1.0 μg/L and averaged 0.2 μg/L
Authors
P. J. Squillace, E.M. Thurman
Methods for analyzing temporal changes in landscape patterns
No abstract available
Authors
Christopher P. Dunn, David M. Sharpe, Glenn R. Guntenspergen, F. Stearns, Z. Yang
Managing Louisiana marshes-An experimental approach
No abstract available.
Authors
E.C. Pendleton, A. Lee Foote, Glenn R. Guntenspergen
Ecosystem modeling of Barataria Basin, Louisiana utilizing desktop parallel technology
No abstract available.
Authors
M. L. White, T. Maxwell, R. Costanza, Thomas W. Doyle
USFWS selected geographic analyses
The geographic information system (GIS) used by the National Wetlands Research Center (NWRC) of the U.S. Fish and Wildlife Service has been valuable in assisting natural resource managers in planning and managing coastal fish and wildlife resources. In the past 5 years, NWRC has conducted about 60 studies employing this technology. Applications have ranged from simple natural resource inventories
Authors
Floyd O. Stayner, James D. Scurry, James B. Johnston, Mary C. Watzin, Pasquale F. Roscigno