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OSW Hydroacoustics

Hydroacoustic Webinars

The Office of Surface Water hosts webinars on various hydroacoustics topics on a monthly basis. Hydroacoustics is a rapidly changing field and these webinars are designed to provide training and updates to USGS users. The proposed topics for each month for the current fiscal year (October 1 to September 30) are shown below. As it is possible that the topic for a given month may change in response to scheduling conflicts or other problems, it is important to periodically 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. We will make an effort to offer two different sessions for each Webinar and post a recording of one of the sessions that can be view 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

Schedule
Date/Time (Times in EST)
Topic
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None scheduled at present

In 2009, the webinar schedule included 11 different topics. Some of the recordings of these webinars are shown below.

Recorded Webinars

Webinars
Title
Description
Date
Presentation
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.
Oct 2009
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.
May 2009

Congo Field Trip
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.

**No recorded webinar is available due to technical difficulties.**
March 2009

ADCP "Best Practices"
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.

**No recorded webinar is available due to technical difficulties.**
February 2009
Review of best practices for operation of acoustic Doppler velocity meters (ADVMs) at Index Velocity gages
January 23, 2009
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.
January 6, 2009
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.
December 2, 2008
Discussion of new tools, techniques, and applications in hydroacoustics
October 14, 2008
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.
August 6, 2008
Presentation on the use of the Hydroacoustics Community forum as an additional support mechanism for hydroacoustics users
May 28, 2008
Discussion of use of ADCPs for discharge measurements with the mid-section method
March 26,2008
Problems and solutions associated with making moving-bed test with a Streampro and adjusting the discharge to correct for a moving-bed
February 25,2008
Webinar introducing TRDI's new WinRiver II software and reviewing the OSW policy memo on this subject
December 12,2007