[Note: this is an internal working document of a USGS-SFSU
collaboration. Data, analysis and results herin should not be
considered as final or accurate. Final results will be presented in
print.]
Calibration Run TMS3 (June 2, 1998)
(
references
|ORE UVM errors
|ADCP errors
|Indexing Errors
|ADCP software
|Discharge main page
)
This calibration data was collected on June 2, 1998, at Three Mile Slough, using a boat-mounted
RDI broad-band 1.2-MHZ ADCP.
Stage height and current velocity during the calibration period, as
measured by the USGS float gauge and the USGS UVM, respectively. The
height is in meters above sea level, and the velocity in m/s. This
velocity is used, via the indexing process, to calculate the discharge.
The stage height is also needed, to evaluate the channel cross section.
(Plotted with script p80708a.m.)
Rating curves, based on averages of the ADCP projected velocity. (See
software description.) The right-hand
figure (plotted with p80708b.m) plots the predicted UVM velocity on the y axis, against the
average velocity for the transect. The left-hand figure (plotted with
p80708c.m) plots the
measured UVM velocity instead. Neither graph is dramatically
lens-shaped.
Finally we show the measured UVM velocity (circles) and that predicted
from the ADCP current profiles (line) (plotted with
p80708d.m).