Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Estimating Diffusion Characteristics of Tidal Waters.
Author Hetlin, ; O'Connel, ;
CORP Author Federal Water Pollution Control Administration, Charlottesville, Va. Middle Atlantic Region.
Year Published 1965
Report Number CB-SRBP-Technical paper-4;
Stock Number PB-216 394
Additional Subjects ( Potomac River ; Tidewater) ; ( Estuaries ; Tidewater) ; Mixing ; Mathematical models ; Diffusion ;
Library Call Number Additional Info Location Last
NTIS  PB-216 394 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 12p
Both the four-thirds law and random process analogy formulas yield effective diffusion coefficients in the proper order of magnitude for the brackish portion of the Potomac Estuary. Either of these formulas should provide useful approximations for other estuaries where good information on salinity variations is not readily available. These formulas should be used with caution in the fresh water portion of tidal rivers, in view of the possible important influence of salinity gradient induced density currents on diffusion. Prototype tracer studies in such locations appear to be necessary to provide reliable estimates of the appropriate diffusion coefficient. (Author Modified Abstract)