SonTek RS5 User Manual (August 2020) 54
6.8.5 Double-click on legend
Double-clicking on a legend allows the user to manually change the limits of the colors
plotted.
6.8.6 Copy to clipboard
Generally, right-clicking on plots or tables in the software will bring up the ability to
copy the plot or table to the clipboard in your laptop to paste onto a separate document.
6.8.7 Change horizontal axis
Generally, right-clicking on plots or tables in the software will bring up various choices
for the horizontal axis.
6.8.8 Remember axis setting for next time RSQ opens
The RSQ software settings will be stored and when newly opened, will display with the
same settings that existed from the last software close.
Section 7. Collecting a Measurement – Moving Boat
This section is a general guide to prepare for and conduct discharge measurements in the field.
The information presented here will discuss pre-measurement tests as well as the general
procedure for making a discharge measurement. Please note that guidelines for Acoustic
Doppler discharge measurements vary among agencies and countries.
7.1. Moving Boat Discharge Measurement Background and Calculations
Total discharge is the volume of water moving past a known point per unit time. In open
channels, discharge (Q) is computed as water velocity (V) multiplied by the cross-
sectional area of the channel (A):
Q = V * A
The RS5 can be used following the moving boat methodology in which the RS5 is
mounted on boat (or floating platform) with the transducers pointed downward into the
water column and then moved laterally across the channel from edge to edge. A single
discharge measurement can be broken into three key components: the start edge,
transect, and end edge (Figure 25).
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