Record Display for the EPA National Library Catalog
RECORD NUMBER: 341 OF 1484Main Title | Effect of Dredging on the Nutrient Levels and Biological Populations of a Lake. | |||||||||||
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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 | |||||||||||
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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) |