Three Streamflow Measurements from the Mississippi River near Clinton, IA, Hickman, KY, and Vicksburg, MS made with an ADCP

Three streamflow measurements are used to demonstrate the use of equations developed in Mueller (in review). All three measurements are from various locations on the Mississippi River. These data were not collected for the purpose of this paper but provide practical examples of the effect of heading errors. The use of data from the Mississippi River allows the collection of 500 or more ensembles in each transect which reduce the overall effect of random errors that could complicate the identification of effects due to heading errors. In addition, by using wide cross sections, the effect of GPS errors due to vegetation near the boundaries of the river are minimized. All measurements were collected with WinRiver II (Teledyne RD Instruments, 2016) and processed with QRev (Mueller, 2016). These three data sets represent three different situations: 1) availability of heading data from a GPS compass (Mississippi River near Hickman, KY), 2) transects intentionally collected at different speeds (Mississippi River near Vicksburg, MS), and 3) GPS data collected where there is minimal influence from a moving bed (Mississippi River near Clinton, IA). All data were collected using Teledyne RD Instruments Rio Grande ADCPs. All data were collected with Teledyne RD Instrument WinRiver II (Teledyne RD Instruments, 2016) and processed with QRev version 3.43 (Mueller, 2016). Due to the complexity of an ADCP data file and the various algorithms applied to compute the streamflow from ADCP data, these data are most useful in either 1) their original raw data format which can be opened and processed in either WinRiver II or QRev or 2) their processed format that can be opened and processed by QRev or opened by Matlab or any software that can read Matlab formatted files. Both WinRiver II and QRev are distributed free. WinRiver II can be obtained from: http://www.teledynemarine.com/rdi/support# QRev can be obtained from: https://hydroacoustics.usgs.gov/movingboat/QRev.shtml Each measurement consists of: 1) *.mmt file is an xml configuration file used by WinRiver II for setup, specific measurement data entry, and filenames of the raw transect data files (pd0) 2) *.pd0 files are the raw binary data collected by WinRiver II. The format for these files is defined in Teledyne RD Instruments (2016). 3) *.txt files contain raw ASCII data from external sensors such as GPS receivers. These data are not used by WinRiver II or QRev but provide the raw external data strings sent by the GPS receiver. 4) *.mat files are the saved data processed by QRev. These files can be opened and processed by QRev or loaded into Matlab or software that can read Matlab formatted files. The variable definitions are documented in Mueller (2016). 5) *.xml are summaries of the data processed by QRev. The variable definitions are documented in Mueller (2016). References Mueller, D.S., in review, Assessment of acoustic Doppler current profiler heading errors on water velocity and discharge measurements: Flow Measurement and Instrumentation, Elsevier, Amsterdam. Mueller, D.S., 2016, QRev-Software for computation and quality assurance of acoustic Doppler current profiler moving-boat streamflow measurements-Technical manual for version 2.8: U.S. Geological Survey Open-File Report, 2016-1068, 79 p., http://dx.doi.org/10.3133/ofr20161068. Teledyne RD Instruments, Inc., 2016, WinRiver II Software User's Guide, P/N 957-6231-00, San Diego, CA, 310 p.