Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 4,143
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Year Published: 1962

Distribution and detoxication of toxaphene in Clayton Lake, New Mexico

The fate of toxaphene, applied in three treatments at a total calculated concentration of 0.05 p.p.m. to Clayton Lake, New Mexico, was followed over a 1.5-year period. A detailed description of the chromatographic method of analysis is given. Water concentrations of toxaphene were higher in leeshore samples than in windward samples for 2 weeks...

Kallman, Burton J.; Cope, Oliver B.; Navarre, Richard J.

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Year Published: 1961

Surface water records of Iowa

No abstract available.

Surface water records of Iowa; 1961; USGS Unnumbered Series; Geological Survey (U.S.)

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Year Published: 1961

Geology and ground-water resources of Clayton County, Iowa

Clayton County includes 784 square miles in northeastern Iowa and in 1960 had a population of 21, 962.  For the most part, the county is a dissected upland that is drained mainly by the southeastward flowing Turkey River and its principal tributary, the Volga River.  The Turkey River empties into the Mississippi River, which flows...

Steinhilber, W.L.; Van Eck, O. J.; Feulner, A.J.

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Year Published: 1961

Standards for reporting fish toxicity tests

The growing impetus of studies on fish and pesticides focuses attention on the need for standardized reporting procedures. Good methods have been developed for laboratory and field procedures in testing programs and in statistical features of assay experiments; and improvements are being made on methods of collecting and preserving fish,...

Cope, O.B.

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Year Published: 1960

Collection and preservation of fish and other materials exposed to pesticides

The effects of pesticides on fish have become improtant to fish conservation since World War II, when DDT first came into common use. With the development of other potent insecticides and the increasing use of massive dosages in more recent years, the threat to fish and fish foods has increased. Fishery biologists have conducted some studies on...

Cope, Oliver B.

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Year Published: 1958

Low-flow characteristics of Iowa streams

Study of the occurrence of low flow on interior Iowa streams and the Big Sioux River.

Schwob, Harlan H.

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Year Published: 1957

Drainage areas of Iowa streams

The drainage area of a stream at a specified location ordinarily may be defined as that area, measured in a horizontal plane, which is enclosed by a topographic divide such that direct surface runoff from precipitation would drain by gravity into the river basin above the specified point. One of the most important factors in the hydrologic...

Larimer, O.J.

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Year Published: 1955

Geology and ground-water resources of Webster County, Iowa

Webster County, comprising an area of 718 square miles just northwest of the center of Iowa, had a population of 44,241 in 1950, with 25,115 in Fort Dodge, the principal city. Some 94.4 percent of the county is in farm land; corn is the principal crop and is used in the raising of hogs and cattle, an important oc cupation in this part of the...

Hale, William E.

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Year Published: 1944

Surface water resources of Iowa for the period October 1, 1940 to September 30, 1942

The State and Federal cooperative program for the systematic collection of stream-flow records in Iowa was initiated in L914, although a few records were obtained by special arrangements during an earlier period. Since the beginning of the cooperative program measurements of stage or discharge have been obtained at about 100 stations on Iowa...

Crawford, Lawrence C.

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Year Published: 1942

Summaries of yearly and flood flow relating to Iowa streams 1873-1940

As a result of the need for basic data and the lack of a current and convenient summary concerning the surface-water resources of lown, a synoptic inventory has been prepared as a part of the present State-wide program which is made possible by State and Federal cooperative action. These hydrologic data are assembled in abbreviated form for the...

Crawford, Lawrence C.