Abstract
Recent work in the measurement of flow in rivers and canals with radioactive tracers has stressed the importance of the use of many sampling points. A thorough investigation of the lateral distribution of the tracer at sampling stations is necessary. Invariably, it is the distance required for complete lateral dispersion of tracer which determines the mixing distance in natural streams. The use of floating samplers was found to be most satisfactory in an investigation of lateral mixing in a small stream. The small size of the samplers, 1000 ml, ensured that comprehensive investigations using many sampling points were undertaken without difficulties of handling after the experiment. A new method of concentration of radioisotopes using paper evaporation of the samples ensured that the tracer was counted with high detection sensitivity despite the small volume of samples. Accurate measurement of the tracer concentration as a function of time at two stations allowed the tracer passage curves to be reliably determined. Use of this data enabled the longitudinal dispersion coefficient to be calculated by two methods.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
