Xylem SonTek FlowTracker2, User Manual

Page: 79 / 308

SonTek – a Xylem brand
FlowTracker2 User’s Manual (January 2019)
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a) For each measurement, you must manually enter the measurement depth.
b) The mean station velocity (mean velocity in vertical) is calculated by integrating all
velocity measurements considering their location as illustrated in Figure 5:5.
Figure 5:5 - Vertical Velocity Curve
c) If multiple measurements are made at the same measurement depth, these
measurements are averaged prior to calculating the velocity integration.
Correction Factor 5.1.3.3
The Correction Factor (CF) is a user supplied parameter used to scale the mean
station velocity or velocity in the vertical.
Be careful when selecting a Correction Factor , as the mean station velocity is always
scaled by this value. Incorrect use of this parameter will affect the final discharge
measurement.
a) The CF is commonly used at edges, internal islands, and other method None
stations to scale the velocity from the adjacent station(s).
b) Table 5:3 list the Correction Factors implemented for each Station Type and
Velocity Method.
Table 5-3 – Correction Factors
Station Type Velocity Method Correction Factor
Bank n/a User defined
Island Edges n/a User defined
Open water
None User defined
0.6 1