Record Display for the EPA National Library Catalog

RECORD NUMBER: 32 OF 39

OLS Field Name OLS Field Data
Main Title Porous Dike Intake Evaluation.
Author Ketschke, B. A. ; Toner, R. C. ;
CORP Author New England Electric System, Westborough, MA. ;Marine Research, Inc., Falmouth, MA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Year Published 1985
Report Number EPA-68-02-3120; EPA/600/7-85/011;
Stock Number PB85-185908
Additional Subjects Dikes ; Water pollution ; Intake systems ; Water pollution control ; Porosity ; Zooplankton ; Field tests ; Avoidance response ; Fishes ; Rocks ; Fouling ; Filtration ; Larvae ; Flow rate ; Hydraulics ; Gabion construction
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB85-185908 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 128p
Abstract
The report gives results of an evaluation of a porous dike intake. A small-scale test facility was constructed and continuously operated for 2 years under field conditions. Two stone dikes of gabion construction were tested: one consisted of 7.5 cm stones; and the other, 20 cm stones. Approach velocity was set at 3 cm/sec. Using a test flume, laboratory studies were also conducted on the avoidance response of fish to a porous dike intake. Flow through a porous dike, induced by a hydraulic head of about 61 cm, depended on the cross-sectional area (tidal height). Throughout the experiment, flow resistance changed, depending on the fouling. Increases in flow resistance resulted in lower flow rates at constant hydraulic head. Flow rates could be increased by backflushing the stone dike. Throughout the experiment, the porous dike showed a steady accumulation of silt and organic matter, but the flow rates tended not to decrease with time.