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OLS Field Name OLS Field Data
Main Title Effect of Dredging on the Nutrient Levels and Biological Populations of a Lake.
Author Churchil, Constance L. ; Brashie, Clyde K. ;
CORP Author South Dakota State Univ., Brookings. Water Resources Inst.
Year Published 1972
Report Number OWRR-B-013-SDAK; 00938,; B-013-SDAK(1)
Stock Number PB-212 718
Additional Subjects ( Dredging ; Water quality) ; ( Limnology ; Dredging) ; ( Lakes ; Dredging) ; Water pollution ; Nutrients ; Food chains ; Turbidity ; Plankton ; South Dakota ; Algae ; Cyanophyta ; Chlorophyta ; Inorganic phosphates ; Biological surveys ; Water chemistry ; pH ; Nitrogen ; Phosphorus ; Ecology ; Eutrophication ; Lake Herman
Library Call Number Additional Info Location Last
NTIS  PB-212 718 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 164p
Abstract Lake Herman, a shallow warm water prairie lake, has been monitored for chemical nutrients and planktonic algae before and during a dredging project. The major change in the lake with the commencement of dredging activity was a 300% increase in both ortho phosphate and total phosphorus. Calcium and total hardness decreased slightly and silica and turbidity were judged to have increased slightly. There were apparently no accompanying changes in planktonic algae, either in population densities or genera present. The silt and water removed with dredging was deposited in a low lying area near the lake, where the silt settled out and the water was returned to the lake. The water in this silt deposit area was also monitored. (Author)
NTIS Title Notes Completion rept. 1 Jul 69-30 Jun 72.
PUB Date Free Form Aug 72,
Category Codes 8H; 13B; 6F; 64H; 68D; 57H
NTIS Prices PC A08/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 326533443
Origin NTIS
Type CAT