Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 4,622
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Year Published: 1970

Flood profile study, Hoosier Creek, Linn County, Iowa

The purpose of this report is to present the results of a flood-profile study made for Hoosier Creek and its tributary, South Hoosier Creek. The reaches studied extend from near the south Linn County line upstream to U.S. Highway 218 on Hoosier Creek, and from the mouth to U.S. Highway 218 on South Hoosier Creek. A total of about 11 miles of...

Schwob, Harlan H.
Flood profile study, Hoosier Creek, Linn County, Iowa; 1970; OFR; 70-294; Schwob, Harlan H.

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Year Published: 1970

Flood profile study, Morgan Creek, Linn County, Iowa

The purpose of this report is to present the results of a study made for a 35,000-foot reach of Morgan Creek. The report shows profiles computed for a large flood under existing conditions and for a smaller flood for two assumed conditions of encroachment. Flood-plain management can benefit from this type of information during future expansion of...

Schwob, Harlan H.
Flood profile study, Morgan Creek, Linn County, Iowa; 1970; OFR; 70-295; Schwob, Harlan H.

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Year Published: 1970

Floods in the upper Des Moines River Basin, Iowa

Data on flood stages, discharges, and frequency are used in the design of bridges and other structures and the conduct of various operations on the flood plains of streams. This report provides these data in the form of flood-peak records, gaging-station records, frequency curves, and flood profiles. Information is provided for 253 miles of...

Schwab, Harlan H.
Floods in the Upper Des Moines River Basin, Iowa; 1970; OFR; 70-296; Schwab, Harlan H.

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Year Published: 1970

The streamflow-data program in Iowa, evaluation of the past, proposal for the future

No abstract available

Burmeister, I.L.
The streamflow-data program in Iowa, evaluation of the past, proposal for the future; 1970; OFR; 70-48; Burmeister, I. L.

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Year Published: 1970

Geology and ground-water resources of Linn County, Iowa

Linn County, in east-central Iowa, covers about 713 square miles and lies in the Western Young Drift section of the Central Lowlands physiographic province. The normal annual rainfall in the county is about 88 inches and the annual mean temperature is about 48°F. The population in 1960 was 136,899, of which 75 percent was urban.Ground water is a...

Hansen, Robert E.

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Year Published: 1970

Ground water resources of Iowa

No abstract available.

Steinhilber, W.L.; Horick, P. J.

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Year Published: 1970

Maximum floods in Iowa

No abstract available.

Schwob, H.H.

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Year Published: 1970

Surface water resources of Iowa

No abstract available

Wiitala, W. W.

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Year Published: 1970

Geology and ground-water resources of Cerro Gordo County, Iowa

The basic geologic framework underlying Cerro Gordo County consists of an igneous or metamorphic Precambrian basement complex overlain by, in ascending order, consolidated sedimen tary rocks of Precambrian, Cambrian, Ordovician, Devonian, Mississippian, and Cretaceous age, and unconsolidated sand, gravel, and clay of Quaternary age. Structurally...

Hershey, H.G.; Wahl, K.D.; Steinhilber, W.L.

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Year Published: 1969

Chronic oral DDT toxicity in juvenile coho and chinook salmon

Technical and p,p′-DDT was incorporated into test diets and fed to juvenile chinook and coho salmon for periods as long as 95 days. Pure p,p′-DDT was slightly more toxic to young salmon than was the technical DDT mixture. Chinook salmon appeared to be 2–3 times more sensitive to a given concentration of DDT in the diet...

Buhler, Donald R.; Rasmusson, Mary E.; Shanks, W.E.