SonTek, a Xylem brand
RiverSurveyor S5/M9 System Manual (February 2013)
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5.3.5. Recorder
The Recorder Menu is provided on the Systems Tab and provides a way of managing files
stored on the 8 GB memory card. You can download all or a selection of files by using the op-
tions presented in the Recorder window.
Download all files – downloads all files from the recorder
Download selected files – allows you to select files using the tick box next to the file
name. Simply select the files to download and then click on Download selected files.
Format Recorder – Clears the memory of the recorder by erasing all files.
Make sure that there is adequate memory available on the recorder prior to making a discharge
measurement. It is suggested to download files and format the recorder between measurement
sites. All files must be downloaded from the ADP for post-processing and data evaluation.
5.3.6.
Measurement Procedure
Now that the pre-measurement tests and initial site specific entries are complete, it’s time to un-
derstand the basic principles behind a discharge measurement. Basically, the total discharge is
the amount of water flow (or net flux) through a section and is computed from the mean water
velocity and the cross-sectional area of the measurement section.
5.3.7. Overview
A single moving boat measurement of discharge can be broken into three key components: the
Start Edge, the Transect and the End Edge. These components are shown in Figure 21 below:
Figure 21. Measurement Sections
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