Accession Number : ADA307570

Title :   Buffalo River Dredging Demonstration.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s) : Averett, Daniel E. ; Zappi, Paul A. ; Tatem, Henry E. ; Gibson, Anthony C. ; Tominey, Elizabeth A.

PDF Url : ADA307570

Report Date : FEB 1996

Pagination or Media Count : 333

Abstract : In July/August 1992, the Corps of Engineers Buffalo District conducted a demonstration of equipment for dredging contaminated sediments. Several thousand cubic yards of sediment were removed from outside the Buffalo River Federal navigation channel limits using three dredge types: (1) open bucket, (2) enclosed bucket, and (3) submersible pump. The effectiveness of a silt screen deployed downstream of the dredge to reduce suspended sediment transport was also evaluated. Extensive sediment and water column monitoring and sampling were conducted during the 2-week demonstration as part of the effort to determine sediment resuspension rates and contaminant releases associated with the dredging operations. Water column samples were analyzed for total suspended solids, total organic carbon, PCBs, PAHs, metals, ammonia, and pH. A water column bioassay test using Daphnia magna was also performed to assess toxicity effects of the dredging operation. Results of this study were used to assess and refine techniques and laboratory tests that have been previously developed by the Corps of Engineers to predict sediment resuspension rates and contaminant releases. In another phase of the study, the Bureau of Mines demonstrated the use of polyelectrolytes for rapid removal of suspended solids from a dilute dredged material slurry.

Descriptors :   *SEDIMENT TRANSPORT, *WATER POLLUTION, *SUSPENDED SEDIMENTS, *DREDGED MATERIALS, *DREDGING, METALS, WATER FLOW, FLUORESCENCE, TOXIC HAZARDS, POLYELECTROLYTES, POLYMERS, TOXICITY, NEW YORK, CARBON, AMMONIA, SLURRIES, FLOW RATE, NAVIGATION, ORGANIC MATERIALS, CONTAMINANTS, RIVERS, PUMPS, WATER QUALITY, CHANNELS(WATERWAYS), BIOASSAY, DISPERSIONS, EARTH HANDLING EQUIPMENT, RADIANT INTENSITY, FLOCCULATION.

Subject Categories : Hydrology, Limnology and Potamology
      Civil Engineering
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE