"Determination of Stream Reaeration Coefficients by Use of Tracers" In Reply Refer To: August 8, 1989 WGS-Mail Stop 415 OFFICE OF SURFACE WATER TECHNICAL MEMORANDUM NO. 89.13 Subject: PUBLICATIONS--"Determination of Stream Reaeration Coefficients by Use of Tracers" by F. A. Kilpatrick and others The purpose of this memorandum is to announce the availability of the subject report, Techniques of Water Resources Investigations, Book 3, Chapter A-18. This manual describes in detail how to perform reaeration measurements on streams using dye and gas tracers injected concur- rently or in tandem to simulate oxygen absorption. Two basic approaches are presented using the slug injection or constant rate injection methods of introducing the tracers. The theory, tech- niques, and analysis procedures for performing reaeration measure- ments on small streams where mixing is complete as well as on large streams where it may be incomplete are presented. Emphasis is on the use of rhodamine WT dye as a relatively conservative tracer and propane as the non-conservative gas tracer and on planning field tests, methods of injection, sampling and analysis, and com-putational techniques to compute desorption and reaeration coefficients. A limited number of these manuals are available for distribution from the Office of Surface Water (OSW). To receive additional copies, please contact NWOWENS in the OSW by electronic mail (please furnish a full address). Charles W. Boning Chief, Office of Surface Water Attachment WRD DISTRIBUTION: Selected list attached This memorandum does not supersede any previous OSW Memorandum. Selected list: Chief Hydrologist Associate Chief Hydrologist Assistant Chief Hydrologist, PC&TS Assistant Chief Hydrologist, R&EC Regional Hydrologists, NE, SR, CR, WR Chief, Branch of Instrumentation Chief, Branch of Scientific Publications Chief, Office of Water Quality Chief, Office of Ground Water Chief, Office of Hydrologic Research Regional Research Hydrologist, NR Regional Research Hydrologist, CR Regional Research Hydrologist, WR FO (1 each) PO (1 each)