Record Display for the EPA National Library Catalog


Main Title Hydraulic Model Study for Boston Outfall. 2. Environmental Performance.
Author Roberts, P. J. W. ; Snyder, W. H. ;
CORP Author Georgia Inst. of Tech., Atlanta. School of Civil Engineering. ;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-93/468;
Stock Number PB94-113669
Additional Subjects Mathematical models ; Outfall sewers ; Hydraulic structures ; Sewage disposal ; Design criteria ; Hydraulic design ; Hydrodynamics ; Performance evaluation ; Waste dilution ; Reprints ; Multiport risers ; Boston Harbor ; Diffusers
Library Call Number Additional Info Location Last
NTIS  PB94-113669 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
Based on the results of Phase I of this study, the number of risers for the tunneled Boston Harbor Outfall was chosen to be 55. In this paper we describe Phase II of the study, in which the number of risers was maintained constant at this value. Each riser has a circular cap with evenly spaced radial ports. The effect on waste-field behavior of increasing the number of ports per riser from eight to 12 was investigated, and the alternative that gave the highest dilution was chosen for the final design. The hydrodynamics of the induced waste field for this final design were then studied further. These experiments included measurement of flux-average dilution and tests of long duration to investigate the stability and temporal variation of the waste field. Tests were then done to assess the environmental performance of the diffuser over the expected range of flowrates and oceanic conditions, and the measured results were compared with the predictions of mathematical models.