What is ISO 24578- Acoustic Doppler profiler about?
ISO 24578 gives guidelines for the use of boat-mounted acoustic Doppler current profilers (ADCPs) for determining flow in open channels. ISO 24578 describes a number of methods of deploying ADCPs to determine the flow. Although, in some cases, these measurements are intended to determine the stage-discharge relationship of a gauging station.
ADCPs can be used to measure a variety of parameters, such as current or streamflow, water velocity fields, and channel bathymetry. As a potential application, an idea of bedload discharge can be obtained applying the bottom track velocity, while suspended sediment flow can be obtained applying the acoustic backscatter and the sonar equation.
Who is ISO 24578 - Acoustic Doppler profiler for?
ISO 24578 on Acoustic Doppler profiler is beneficial for:
- Water resources management
- Hydrologists
- People who study oceanography
Why should you use ISO 24578 - Acoustic Doppler profiler?
The term acoustic Doppler current profilers (ADCP) has been adopted as a generic term for a technology that is manufactured by various companies worldwide. They are also called acoustic Doppler velocity profilers (ADVPs) or acoustic Doppler profilers (ADPs).
The ADCP is a device for measuring current velocity and direction, throughout the water column, in an efficient and non-intrusive manner. An ADCP is usually a cylinder with a transducer head on the end. The transducer head is typically a ring of three or more acoustic transducers with their faces angled to the horizontal and at specified angles to each other. It can produce an instantaneous velocity profile through the water column while disturbing only the top few decimetres. ADCPs nominally work using the Doppler principle. ISO 24578 is an acoustic method used to measure boat speed and direction by computing the Doppler shift of sound reflected from the stream bed relative to the ADCP. ISO 24578 also assists the user with the deployment method technique which is used to propel the ADCP across a watercourse.
Overall, ISO 24578 is helpful as it provides details on methods and applications for measurement of flow in open channels from a moving boat that can help you out in your business. The ADCP, which was originally developed for oceanographic work, has since been developed for use in estuaries and rivers. An ADCP can be mounted on a boat, flotation collar, or raft, and propelled across a river. The ADCP collects velocity data, the direction of flow, depth data, and boat speed, direction, and position. The ADCP determines an estimated velocity for each cell using a center-weighted averaging scheme, which takes account of the water not only in the bin itself but also in the two adjacent bins.
What’s changed since the last update?
BS ISO 24578:2021 supersedes PD ISO/TR 24578:2012, which is withdrawn. BS ISO 24578:2021 cancels and replaces ISO/TR 24578:2021, which has been technically revised.
The main changes compared to the previous edition are as follows:
- The title has been modified to read "Hydrometry — Acoustic Doppler profiler — Method and application for measurement of flow in open channels from a moving boat"
