Record Display for the EPA National Library Catalog
RECORD NUMBER: 12 OF 14Main Title | The chemical investigation of Recent lake sediments from Wisconsin lakes and their interpretation / | |||||||||||
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Author | Bortleson, Gilbert Carl, | |||||||||||
CORP Author | United States. Environmental Protection Agency. | |||||||||||
Publisher | United States Environmental Protection Agency, Water Quality Office, | |||||||||||
Year Published | 1971 | |||||||||||
Report Number | EPA16010-EHR-03/71; W7207952 | |||||||||||
OCLC Number | 00380265 | |||||||||||
Subjects | Lakes--Wisconsin ; Sediments (Geology)--Wisconsin ; Eutrophication--Wisconsin ; Water chemistry--Wisconsin | |||||||||||
Additional Subjects | Lakes--Wisconsin ; Sediments (Geology)--Wisconsin ; Eutrophication--Wisconsin ; Water chemistry | |||||||||||
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Collation | viii, 278 pages : illustrations, figures, tables ; 28 cm | |||||||||||
Notes | "March 1971." Includes bibliographical references (pages 246-259). |
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Contents Notes | To trace the effects of cultural eutrophication, one meter sediment cores were used to determine the history of calcareous and noncalcareous Wisconsin lakes. Cores were analyzed for carbon, phosphorus, calcium, magnesium, potassium, aluminum, iron, and manganese. Determinations of organic nitrogen, exchangeable ammonium and acid soluble phosphorus were made on selected sedimentary profiles. Recent sedimentation rates and identification of pre- and postcultural sediments were determined by ragweed pollen. Enrichment of phosphorus in postcultural Lake Mendota, Wisconsin, sediments are the effect of increased phosphorus supply from domestic sewage. Chemical stratigraphy of concentration-depth diagrams permit a qualitative evaluation of cultural activities. Potentialities and limitations of using recent lake sediments to evaluate eutrophication are discussed. |