Hydroacoustic Webinars
The Office of Surface Water hosts webinars on various hydroacoustics topics on a periodic basis. Hydroacoustics is a rapidly changing field and these webinars are designed to provide training and updates to USGS users. As it is possible that the topic may change in response to scheduling conflicts or other problems, it is important to check this web page for any updates. The OSW will send out an announcement for each Webinar with the dates and times, along with instructions for participating in the Webinar. An effort will be made to offer two different sessions for each Webinar and post a recording of one of the sessions that can be viewed or reviewed at the user convenience.
Webinars Open for Registration
- Register for any of the future webinars by going to the USGS Webex web page and navigating to the date of the desired Webinar.
Schedule
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Topic
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Date/Time (Times in ET)
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| Use of GPS with ADCPs |
Mar 4 at 14:00 and Mar 8 at 11:00 |
| Get Acquainted with the Latest Versions of LC, SMBA |
Apr 3 at 14:00 and Apr 16 at 11:00 |
Recorded Webinars
Links to recordings of previous webinars.|
Title / Recorded Webinar
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Date
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Presentation
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| Status of Testing of Hydroacoustic Instruments |
February 2013 |
pdf |
| In this webinar, an oveview of the USGS testing program is provided along with examples of the different kinds of testing. The stataus of USGS analysis of comparison measurements for TRDIs RiverRay and SonTek M9s/S5s and Ott ADCs as of February 2013 is presented. OSW's plans for future testing activities in 2013 are discussed, including the inital implementation of an ADCP lab testing program similar to that for the Flowtracker ADV. An update on requirements for routine QA of ADCPs is also provided. | ||
| Review
and Rating of Moving-Boat ADCP Q Measurements |
October
2012 |
pptx |
| This webinar presents approaches to reviewing and rating discharge measurements made using ADCPs. The steps presented for rating a measurement while using some quantitative values are qualitative in nature and are focused at determining an Excellent, Good, Fair, or Poor rating rather than a quantitative uncertainty. In addition to presenting steps for review of measurements, three measurement examples are used to demonstrate the proposed approach. | ||
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October 2011
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This webinar reviews OSW policies as well as best
practices for compass calibration when making ADCP
discharge measurements.
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September 2011
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This webinar: (a) discusses when mid-section methods
should be used, (b) provides an overview of the software
available for making mid-section measurements, and (c)
discusses best practices for mid-section ADCP discharge
measurements.
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August 2011
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July 2011
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In this webinar, the key features of the SonTek/YSI
RiverSurveyor Live software are discussed. Topics
covered include: a) data collection and processing with
RiverSurveyor Live PC, b) data collection with
RiverSurveyor Live mobile, and c) use of USGS specific
programs (SMBA, LC, extrap) with RiverSurveyor data
files.
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June 2011
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Webinar on QA practices for hydroacoustic instruments
in the USGS. Topics include: acceptance testing, post
factory repair testing, and user testing, when
comparison measurements ought to be made, current
policies regarding comparison measurements with new
equipment, annual check measurements, beam alignment
tests, and other QA practices.
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May 2011
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An overview of the latest tools, techniques,
applications, and resources for hydroacoustic discharge
measurements. The intent of the webinar is to update
USGS staff on instruments/technologies, review important
policies (especially new ones), and common issues.
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May 2010
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Dan Wagner describes the OTT ADC meter and summarizes
the latest results of USGS testing
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April 2010
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Review of how to get ADCP data from the field into
the USGS NWIS database. An overview of the use of SWAMI,
Site Visit and other tools are presented and practical
considerations discussed. Presented by Joe Nielsen, OSW
and Liz Hittle, PA WSC.
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Understanding and documenting
index velocity rating analysis (No Recording)
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April 2010
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Victor Levesque presents a webinar on understanding
and documenting regression analysis to develop an index
velocity rating. The webinar summarizes recommended
approaches for documenting rating analyses for
index-velocity ratings and provides specific examples.
An example rating spreadsheet is available here.
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Reviewing and rating ADCP discharge measurements (No
Recording)
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April 2010
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David Mueller discusses approaches to reviewing and
rating discharge measurements made using ADCPs. In
addition to presenting steps for review of measurements,
David provides three measurement examples, shows how he
reviewed them, and how he assigned an overall rating to
the measurements.
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March 2010
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This webinar summarizes common issues related to
hydroacoustics as identifed during Office of Surface
Water Technical Reviews of USGS Water Science Centers,
2007-2009.
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Oct 2009
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Techniques have been developed to use acoustic
backscatter from acoustic Doppler velocity meters
(ADVMs) to estimate suspended sediment concentrations in
rivers. ADVMs are often used for velocity measurements
in streams using the index velocity method. The Federal
Interagency Sedimentation Project (FISP) has provided
funding for developing a manual and standardized method
for using acoustics backscatter for sediment
measurements. This webinar summarizes current progress
on this work.
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June 2009
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Chad Wagner and David Mueller provided an overview of
an ongoing analysis to quantify the bias and random
noise associated with GPS-based (VTG and GGA) ADCP
discharge measurements relative to bottom-track
bottom-track based discharge measurements. The GPS
equipment utilized in the analysis is limited to GPS
receivers with the capability of providing sub-meter
positional accuracy, and does not include Real-time
Kinematic (RTK) GPS units. The analysis is based on 63
bottom-track and GPS-referenced discharge measurements
comprised of 579 individual discharge measurement
transects collected at 42 different sites across the
United States, Canada and New Zealand between 2002 and
2007 by various field personnel from the USGS,
Environment Canada and New Zealand’s National Institute
of Water and Atmosphere using various deployment
techniques and ADCPs. The analysis also evaluated
measured discharges using differentially corrected GGA
as the navigation reference for three wide-area
satellite-based differential correction sources commonly
used in North America (WAAS, OminStar and CDGPS).
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May 2009
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Paul Diaz provides an overview on the use of
Bluetooth radios with ADCPs. Bluetooth and other types
of wireless systems are used in conjunction with laptops
or PDAs to communicate with ADCPs. This allows
hydrographers to configure and collect ADCP data from
remote controlled or tethered boats without the need to
be directly connected. The presentation covers the types
of wireless systems currently available, their typical
uses, example hardware and software settings, and
troubleshooting.
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Congo Field Trip (No Recording)
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March 2009
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John Shelton discusses his experiences while making
measurements of velocity and discharge on the Congo
River. Water depths in excess of 600 feet and water
velocities in excess of 15 ft/s were measured during
this work. Measured discharges were greater than 1.26
million ft3/s
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ADCP "Best Practices" (No
Recording)
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February 2009
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Overview of contents of "Measuring Discharge with
Acoustic Doppler Current Profilers from a Moving Boat,
Techniques and Methods Report, Chapter 22 of Book 3,
Section A, by David S. Mueller and Chad R. Wagner
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January 23, 2009
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Review of best practices for operation of acoustic
Doppler velocity meters (ADVMs) at Index Velocity gages
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January 6, 2009
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Discusses 1) recent updates to LC to provide
automated QA/QC of loop tests and corrections, 2) use of
SMBA to correct discharges using multiple stationary
moving-bed tests, and 3) release of WinRiver II 2.04
with changes to the depth screening alogrithms.
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December 2, 2008
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Overview on the use of WinRiver II software version
2.03. Topics include: improvements to stability,
modifications to the side-lobe cut-off algorithm and how
it can affect discharge totals, etc.
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October 14, 2008
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Discussion of new tools, techniques, and applications
in hydroacoustics
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August 6, 2008
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Webinar presented by Gary Wilson, Missouri WSC,
discussing bathymetric mapping of reservoirs in
Missouri. The presentation includes discussions of basic
equipment, preparation, field techniques, quantifying
and specifying data accuracy, and generating contour
maps in Arc.
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May 28, 2008
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Presentation on the use of the Hydroacoustics
Community forum as an additional support mechanism for
hydroacoustics users
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March 26,2008
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Discussion of use of ADCPs for discharge measurements
with the mid-section method
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February 25,2008
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Problems and solutions associated with making
moving-bed test with a Streampro and adjusting the
discharge to correct for a moving-bed
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December 12,2007
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Webinar introducing TRDI's new WinRiver II software
and reviewing the OSW policy memo on this subject
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