1966 Volume 15 Issue 6 Pages 317-324
The tracer experiments to measure the velocity, flow rate and the dilution rate were carried out on the River Kandagawa and the River Nipparagawa. Small quantities of 24Na or 82Br solutions were injected into the rivers as a“pulse”together with rather large quantities of nonradioactive solution, or prior to the continuous injection of the nonradioactive tracer solution.
The aim of such a double tracer technique in a broad sense is 1) to compare the advantages and the disadvantages of the radioactive tracer method and the nonradioactive tracer method, and 2) to examine the sorption loss of the tracer by using different elements at the same time. The counting efficiencies of various methods were also examined as well as the effectiveness of the total counting method.
