Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 4,441
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Year Published: 1981

Organochlorine residues in fish: National Pesticide Monitoring Program, 1970-74

As part of the National Pesticide Monitoring Program, the U.S. Fish and Wildlife Service analyzed organochlorine contaminant residues in fish samples collected from about 100 stations each year from 1970 to 1974. During this period, mean residues of DDT and its metabolites declined nationally but remained widespread, and high concentrations...

Schmitt, Christopher J.; Ludke, J. Larry; Walsh, D.F.

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Year Published: 1981

The freshwater‐inflow‐to‐estuaries issue

Over 55% of the United States commercial fish and shellfish catch is dependent upon estuaries for spawning and nursery functions, but estuaries cannot function ecologically without an adequate supply, seasonal inflow, and quality of freshwater from inland rivers. Such inland river development projects as constructing reservoirs, leveeing rivers,...

Benson, Norman Gustaf

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Year Published: 1981

Mercury in the muscle tissue of fish from three northern Maine lakes

There is evidence that fish in Canadian wilderness areas exhibit elevated mercury levels because of the oligotrophic nature of the lakes they inhabit (BROUZES et al. 1977). D'ITRI et al. (1971) reported higher levels of mercury in trout from oligotrophic waters than in trout from eutrophic waters in unpolluted areas. They attributed part of the...

Akielaszek, J.J.; Haines, T.A.
Mercury in the muscle tissue of fish from three northern Maine lakes; 1981; Article; Journal; Bulletin of Environmental Contamination and Toxicology; Akielaszek, J. J.; Haines, T. A.

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Year Published: 1980

Floods in the Raccoon River basin, Iowa

Evaluation of flood hazards, and the planning, design, and operation of various facilities on flood plains requires information on floods. This report provides information on flood stages and discharges, flood magnitude and frequency, bench mark data, and flood profiles for the Raccoon River and some of its tributaries. It covers the Raccoon River...

Heinitz, Albert J.
Heinitz, A.J., 1980, Floods in the Raccoon River basin, Iowa: U.S. Geological Survey 80–162; 110 p., https://doi.org/10.3133/ofr80162.

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Year Published: 1980

Iowa observation well network; past, present, and future

Water-level measurements in wells were started by the USGS in Iowa in 1935. Since then a total of about 450 different wells have been measured. The present network consists of about 70 wells. The measurement of these water levels aids in evaluating the present and future water resources of the State. Many factors influence water-level fluctuations...

Logel, John D.
Iowa observation well network; past, present, and future; 1980; OFR; 80-755; Logel, John D.

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Year Published: 1980

Physical environment and hydrologic characteristics of coal-mining areas in Missouri

Hydrologic information for the north-central and western coal-mining regions of Missouri is needed to define the hydrologic system in these areas of major historic and planned coal development. This report describes the physical setting, climate, coal-mining practices, general hydrologic system, and the current (1980) hydrologie data base in these...

Vaill, J.E.; Barks, James H.
Physical environment and hydrologic characteristics of coal-mining areas in Missouri; 1980; WRI; 80-67; Vaill, J. E.; Barks, James H.

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Year Published: 1980

Water quality of Indian Creek-Van Buren Watershed, Iowa and Missouri

Generally, the water quality of Indian Creek-Van Buren watershed is suitable as a source of Municipal, industrial and agricultural water supply and for fish and wildlife. This suitability is based upon comparisons of the existing water quality of Indian Creek to Federal and State water quality standards and criteria...

Slack, Larry J.; Detroy, Mark G.
Water quality of Indian Creek-Van Buren Watershed, Iowa and Missouri; 1980; OFR; 80-677; Slack, Larry J.; Detroy, Mark G.

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Year Published: 1980

Water resources data for Iowa, water year 1979

This report was prepared by personnel of the Iowa district of the Water Resources Division of the U.S. Geological Survey under the supervision of D. K. Leifeste, District Chief, and Alfred Clebsch, Jr., Regional Hydrologist, Central Region. It was done in cooperation with the State of Iowa and with other agencies. This report...

Water resources data for Iowa, water year 1979; 1980; WDR; IA-79-1; Geological Survey (U.S.)

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Year Published: 1980

Ground water resources of Lee County

Approximately 8.0 percent of the water used in Lee County comes from underground sources. It is estimated that the use of ground water in the county currently approaches 2.8 billion gallons per year. For comparison, this amount would provide each resident with 172 gallons of water a day during a year. Actually, few if any households use this much...

Gordon, Donivan L.

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Year Published: 1980

Toxicity of five forest insecticides to cutthroat trout and two species of aquatic invertebrates

The Northern Rocky Mountain region has had scattered infestation of the western spruce budworm Christoneura occidentalis since the early 1900's (U.S. DEPARTMENT OF AGRICULTURE (USDA) 1976b). On the basis of aerial surveys in 1975, TUNNOCK et al. (1976), estimated that budworm defoliation occurred on 2,278,804 acres of six National Forests in...

Woodward, D.F.; Mauck, W.L.