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Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.

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Flood of July 9-11, 1993, in the Raccoon River basin, west-central Iowa Flood of July 9-11, 1993, in the Raccoon River basin, west-central Iowa

Water-surface-elevation profiles and peak discharges for the flood of July 9-11, 1993, in the Raccoon River Basin, west-central Iowa, are presented in this report. The profiles illustrate the 1993 flood along the Raccoon, North Raccoon, South Raccoon, and Middle Raccoon Rivers and along Brushy and Storm Creeks in the west-central Iowa counties of Carroll, Dallas, Greene, Guthrie, and...
Authors
D. A. Eash, B.A. Koppensteiner

Modeling fish dynamics and effects of stress in a hydrologically pulsed ecosystem Modeling fish dynamics and effects of stress in a hydrologically pulsed ecosystem

Many wetlands undergo seasonal cycles in precipitation and water depth. This environmental seasonality is echoed in patterns of production of fish biomass, which, in turn, influence the phenology of other components of the food web, including wading birds. Human activities, such as drainage or other alterations of the hydrology, can exacerbate these natural cycles and result in...
Authors
D.L. DeAngelis, W.F. Loftus, J.C. Trexler, Robert E. Ulanowicz

Effects of salinity on baldcypress seedlings: Physiological responses and their relation to salinity tolerance Effects of salinity on baldcypress seedlings: Physiological responses and their relation to salinity tolerance

Growth and physiological responses of 15 open-pollinated families of baldcypress (Taxodium distichum var.distichum) subjected to flooding with saline water were evaluated in this study. Ten of the families were from coastal sites in Louisiana and Alabama, USA that have elevated levels of soil-water salinity. The other five families were from inland, freshwater sites in Louisiana...
Authors
J. A. Allen, J. L. Chambers, S. R. Pezeshki

Water resources data, Iowa, water year 1996 Water resources data, Iowa, water year 1996

No abstract available.
Authors
J.E. May, J.G. Gorman, R.D. Goodrich, M.W. Bobier, V.E. Miller

Evaluation of drawdown and sources of water in the Mississippi River alluvium caused by hypothetical pumping, Muscatine, Iowa Evaluation of drawdown and sources of water in the Mississippi River alluvium caused by hypothetical pumping, Muscatine, Iowa

A study was conducted to evaluate drawdown and volumetric changes in sources of water in the Mississippi River alluvium caused by hypothetical pumping. A steady-state, ground-water flow model was constructed for a previous study to simulate February 1993 hydrologic conditions, which were assumed to be an acceptable estimate of the ground-water system at equilibrium. The flow model was...
Authors
K.J. Lucey

Effects of the 1993 flood on the determination of flood magnitude and frequency in Iowa Effects of the 1993 flood on the determination of flood magnitude and frequency in Iowa

To evaluate the effects of the 1993 flood in the upper Mississippi River Basin on the determination of flood magnitude and frequency, discharges that had recurrence intervals of 10, 25, 50, and 100 years computed from data through the 1992 water year were compared with those computed from data through the 1993 water year for 62 selected streamflow-gaging stations in Iowa. On the basis of...
Authors
David A. Eash

Reforestation of bottomland hardwoods and the issue of woody species diversity Reforestation of bottomland hardwoods and the issue of woody species diversity

Bottomland hardwood forests in the southcentral United States have been cleared extensively for agriculture, and many of the remaining forests are fragmented and degraded. During the last decade, however, approximately 75,000 ha of land-mainly agricultural fields-have been replanted or contracted for replanting, with many more acres likely to be reforested in the near future. The...
Authors
J. A. Allen

A structural equation model of plant species richness and its application to a coastal wetland A structural equation model of plant species richness and its application to a coastal wetland

Studies of plant species richness have often emphasized the role of either community biomass (as an indicator of density effects) or abiotic factors. In this article we present a general model that simultaneously examines the relative importance of abiotic and density effects. General and specific models were developed to examine the importance of abiotic conditions, disturbance, and...
Authors
J.B. Grace, B.H. Pugesek
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