Stream Velocity -- Page 13 of 25



Page 13 of 25

The interactive graph to the left shows that streams flow fastest near the water surface and slowest near the bottom of the stream. Use your mouse to move the "crosshairs" and read the velocity at different depths. Record your results. The velocity data from your prior measurements is already displayed.

0.1D m/sec
0.2D m/sec
0.3D m/sec

0.4D m/sec
0.5D m/sec
0.6D m/sec

0.7D m/sec
0.8D m/sec
0.9D m/sec

Recall that we are trying to determine the average velocity of a stream at a particular spot. Now use the calculator tool and determine the stream's average velocity from these 9 velocity values.

Average = m/sec

Click and drag on the graph above to move the 'crosshairs' to show velocity at various depths.