PROFILING METHODS
2-D Method

1. Locate the center line of the flow.
2. Locate vertical velocity lines (VVL) halfway between the center line and the side walls of the conduit. This is measured at the widest part of the flow.
3. Take at least seven velocity measurements at different depths along the center line.
4. Take velocity readings at different depths on the VVL. The distance between these depths should be the same as those on the center line.
5. Take final point velocity readings at the right and left corners of the flow.
6. Check the data for any outliers. If a best fit curve of the velocity profile were plotted, an outlier would lie outside the best fit curve region. See Figure 3-1 on Page 3-2.
7. Average all measurements except outliers for  average velocity.  Remember to include the corner measurements.