
P/N 95B-6129-00 (August 2021) StreamPro Deployment Guide
Page 16 EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Discharge Measurements
Before starting a discharge measurement with a StreamPro ADCP using WinRiver II, the Hydrologist has:
1. Prepared the StreamPro, Boat or RC boat, and any external sensors being used
2. Configured the computer, communications link(s), and WinRiver II software for data collec-
tion using the StreamPro and any external sensors
3. Created a measurement file for the site
4. Ran the StreamPro Built-In tests
5. Performed the compass calibration procedure
6. Performed a moving bed test
The Hydrologist is now ready to start making the measurement.
Discharge Measurement
A proper moving boat discharge measurement consists of multiple transects – passes across the measure-
ment location from one bank to the other, collecting data continuously as they cross. For each transect,
the Hydrologist must maneuver the StreamPro to the marked position at one bank of the measurement
location (see Locating the Start and Stop Positions) and hold that position while they measure the distance to
the shore from the StreamPro. Then, start a measurement transect and enter the starting edge bank and
distance into the WinRiver II software. After collecting the required number of edge ensembles, the Hy-
drologist maneuvers the StreamPro towards the opposite bank of the measurement location in a smooth
and steady manner, collecting data continuously as they travel across the river, and monitoring for data
loss and quality issues. When the Hydrologist reaches the marked position at the other bank of the meas-
urement location they hold that position while they collect the required number of edge ensembles, meas-
ure the distance to the bank, end the transect, and enter the ending edge distance in the WinRiver II soft-
ware. After completing each transect, the Hydrologist performs a cursory review of the results and pre-
pares to start the next transect.
The best practice for a moving boat discharge measurement is to collect discharge transects in reciprocal
pairs (one transect in each direction across the measurement location) with some minimum number of
total transects and/or minimum cumulative total duration for all transects. For locations with steady-state
flow conditions, at least four transect that agree with each other within 5% of the mean of all the samples,
and additional transects and/or cumulative transect duration may be required if that criteria is not met.
The Hydrologist must make sure that the maximum permissible relative residual (MPRR) is met before
leaving the site. A minimum of two good water profile bins above the sidelobe cutoff are desired for all en-
sembles in a transect to enable extrapolation of flow in the unmeasured top and bottom regions of the
profile.
Once at least four transect that agree with each other within 5% of the mean of all the samples have been
collected, the Hydrologist/team will perform a QA/QC review of the data. Primary indicators of high
StreamPro data quality include a minimum loss of Bottom Track depth and velocity data, minimum loss
of ensemble and individual bin water profile data, maximization of the measured Q as a percent of total Q,
and consistency of the water velocity profile data between bins (vertically) and ensembles (horizontally)
across the transect.