Abstract
ABSTRACT THE hydraulic efficiency of a pond is related to the water flow pattern and the degree of mixing within the pond's volume. Inefficiencies result in the actual detention time of the water being less than the theoretical detention time. These inefficiencies are typically characterized as dead storage. The dead storage characteristics of a laboratory model were studied using dye tracer tests. Two theoretical methods for evaluating dye tracer tests, the plug flow model and the continuous stirred tank reactors in series model (CSTRS), were evaluated. The optimized dead storage values obtained from the plug flow model were the same as those predicted by the CSTRS model with two reactors in series. Dead storage was found to be heavily dependent upon the length/width (i/co) ratio ranging from 12 to 17% for l/co > 2:1 and from 23 to 27% for i/co < 2:1.
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