A symposium on direct measurement of the reaeration capacity of streams and estuaries was conducted in July 1970 at the Georgia Institute of Technology. It was designed to make public all of the available information on the subject at that time. The papers presented provide an outline of the fundamentals of gas transfer in turbulent systems, the theory and application of radiotracers for measuring gas transfer in natural waters, and the associated field and laboratory procedures. Other papers provide tracer-observed values of the reaeration capacity of several streams, and comparisons with computed values obtained from well-known predictive models. A new theory regarding the relationship between the reaeration capacity and the hydraulic properties of natural streams is presented, together with early supporting observed results. The effects of pollutants on the reaeration capacity, and some observed results, are discussed. (Author Modified Abstract)

Includes bibliographical references.

Turbulence, mixing and gas transfer / E.C. Tsivoglou -- Relative gas transfer characteristics of krypton and oxygen / E.C. Tsivoglou -- Field tracer procedures and mathematical basis / J.R. Wallace -- Field hydraulic studies / J.R. Wallace and D.E. Hicks -- Laboratory procedures / R.J. Velten -- Reaeration capacity of the Flint, South and Patuxent rivers / E.C. Tsivoglou -- Oxygen balance of the South River / A.G. Herndon -- Reaeration studies of the Chattahoochee River / J.R. Wallace -- Model study of reaeration capacity of the James River Estuary (Virginia) / M.W. Lammering -- Field studies in Yaquina River Estuary of surface gas transfer rates / D.J. Baumgartner [and others]. -- Radiological safety / Jon R. Longtin -- Effect of hydraulic properties on reaeration / Edward L. Thackston -- Pollutant effects on reaeration / L.A. Neal -- Observed vs. calculated reaeration capacities of several streams / J.R. Wallace -- Relationships between hydraulic properties and reaeration / E.C. Tsivoglou. A symposium on direct measurement of the reaeration capacity of streams and estuaries was conducted in July 1970 at the Georgia Institute of Technology. It was designed to make public all of the available information on the subject at that time. The papers presented provide an outline of the fundamentals of gas transfer in turbulent systems, the theory and application of radiotracers for measuring gas transfer in natural waters, and the associated field and laboratory procedures. Other papers provide tracer-observed values of the reaeration capacity of several streams, and comparisons with computed values obtained from well-known predictive models. A new theory regarding the relationship between the reaeration capacity and the hydraulic properties of natural streams is presented, together with early supporting observed results. The effects of pollutants on the reaeration capacity, and some observed results, are discussed.