You cqan probably estimate ...
Published by Jose A. Marti
You cqan probably estimate volume with some cross-sections along its length, and averaging the depth along each section. however, the estimate must consider the inflow from the lateral lines. If you can estimate the volume and retention time, you can try to analyze it as a biological reactor. Another possible way would be to analyze it assuming it is a stream composed of segments, using the Streeter-Phelps equation.