Transmittal of Open-File Report 87-245 "Determination of Stream Reaeration Coefficients by Use of Tracers"



In Reply Refer To:                                 August 14, 1987
WGS-Mail Stop 415




OFFICE OF SURFACE WATER TECHNICAL MEMORANDUM NO. 87.10

Subject:  PUBLICATIONS--Transmittal of Open-File Report 87-245
                        "Determination of Stream Reaeration
                        Coefficients by Use of Tracers" by F. A.
                        Kilpatrick, R. E. Rathbun, N. Yotsukura,
                        G. W. Parker, and L. L. DeLong

Attached is a copy of the subject Open-File Report that was
prepared by the U.S. Geological Survey as a preliminary report to
a forthcoming Techniques of Water-Resources Investigations report
on the same subject.  This manual describes the slug-injection and
constant-rate-injection methods of performing gas-tracer
desorption measurements.  Emphasis is on the use of rhodamine WT
dye as a relatively conservative tracer and propane as the
nonconservative gas tracer, on planning field tests, methods of
injection, sampling and analysis, and computational techniques to
compute desorption and reaeration coefficients. The report covers
measurement techniques for both one- and two-dimensional
dispersion situations thus, measurements can be made on wide
streams where lateral mixing is incomplete.

The computer program referred to in the report is available from
the Office of Surface Water.

A limited number of additional copies of the report are available
in the Office of Surface Water.  Your comments are welcomed.




                                   Verne R. Schneider
                                   Chief, Office of Surface Water

Attachment

WRD Distribution:  A, FO-LS, SL

This memorandum does not supersede any previous memorandum.