Link to USGS home USGS Home
Contact USGS
Search USGS
OSW Hydroacoustics

Using ADCPs in Moving Bed Conditions

Version Date: 01/15/2011

David S. Mueller and Chad R. Wagner


Objective

By the end of this course, students will be able to:


Taking the Class

Prerequisites

Data Files

Software

The following software will be used in this training class:

Narration and Slide Notes

This course is narrated!Comprehensive slide notes appear for each slide and match the narration word-for-word. If you decide to turn the sound off and not listen to the narration, you may want to read the slide notes carefully as they contain more information than what appears on the slide. For your convenience, the Notes pane of the navigation bar will be the default pane when you begin each lesson.

Assessment and Class Credit

There are learning assessment questions and exercises throughout the course material and summary assessment at the end of each lesson. A score of 80% is require to pass the post-lesson assessments. You are give two attempts to pass the assessment. For USGS personnel to get credit for having completed the training class, the student must have signed up for the training in DOI Learn and complete a post-course assessment in DOI Learn.

Questions and Problems


Class Lessons

To start each lesson click on the lesson title below.

Lesson 1 - Effect of Moving Bed on Discharge Measurements

By the end of this lesson, the learner will be able to:

  1. What ADCP bottom tracking is and why it is necessary
  2. Define the effect a moving bed has on measurement of velocity
  3. Recognize the appearance of a moving bed in the vendor software

Lesson 2 - Determining is a Moving Bed Exists Using the Loop Method

By the end of this lesson, the learner will be able to:

  1. Calculate the magnitude of the moving bed velocity
  2. Determine whether the moving bed magnitude is appreciable enough to require alternative data collection methods and/or data correction methods.

Lesson 3 - Determining if a Moving Bed Exists Using the Stationary Method

By the end of this lesson, the learner will be able to:

  1. List the various methods for making acoustic measurements in moving bed conditions
  2. Summarize the pros and cons of each method

Lesson 4 - Introduction to Global Positioning Systems (GPS)

By the end of this lesson, the learner will be able to:

  1. Explain how GPS operates
  2. Identify the errors associated with GPS position and velocity measurements
  3. Define differential correction and why it is important

Lesson 5 - Using GPS with Acoustic Doppler Current Profilers (ADCPs)

By the end of this lesson, the learner will be able to:

  1. Integrate a GPS unit with an ADCP in WinRiver and Riversurveyor software
  2. Complete a compass calibration and determine a magnetic variation
  3. Describe the quality of an integrated GPS signal

Lesson 6 - Configuring GPS and RiverSurveyor Live

By the end of this lesson, the learner will be able to:

  1. Demonstrate the use of Riversurveyor software to setup and communicate with all necessary equipment and collect ADP data
  2. Use the software to playback and output GPS-referenced velocity and discharge data

Lesson 7 - Configuring WinRiver II with GPS

By the end of this lesson, the learner will be able to:

  1. Demonstrate the use of WinRiver software to setup and communicate with all necessary equipment and collect ADCP data
  2. Use the software to playback, process, and output GPS-referenced velocity and discharge data

Lesson 8- Loop Method

By the end of this lesson, the learner will be able to:

  1. Describe the loop method and when it can be used
  2. Apply the loop method in the field
  3. Utilize the LC program to correct discharge data for moving bed condition

Lesson 9 - Multiple Moving-Bed Test Method

By the end of this lesson, the learner will be able to:

  1. Describe the process of making multiple moving bed tests and under what conditions is can be a practical method of correcting discharge biased by a moving bed.
  2. Apply the method of making multiple moving bed tests in the field
  3. Post-process the data in the office to correct discharge data for moving bed condition

Lesson 10 - Mid-Section Method

By the end of this lesson, the learner will be able to:

  1. Describe the section by section method and under what conditions is can be a practical method of using an ADCP to measure discharge biased by a moving bed.
  2. Apply the section by section method in the field using the appropriate vendor software

Lesson 11 - Azimuth Method

By the end of this lesson, the learner will be able to:

  1. Describe the azimuth method and when it can be used
  2. Apply the azimuth method in the field
  3. Compute the corrected discharge data for moving bed condition