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BS ISO 24578:2021 Hydrometry. Acoustic Doppler profiler. Method and application for measurement of flow in open channels from a moving boat >
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BS ISO 24578:2021 Hydrometry. Acoustic Doppler profiler. Method and application for measurement of flow in open channels from a moving boat, 2021
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principles of the boat mounted ADCP method
- 4.1 General
- 4.2 Doppler principle applied to moving objects
- 4.3 Acoustic Doppler current profiler techniques
- 4.3.1 General
- 4.3.2 Pulse incoherent
- 4.3.3 Pulse-to-pulse coherent
- 4.3.4 Broadband (Spread spectrum)
- 4.4 Measurement of velocity profile
- 4.4.1 General
- 4.4.2 Measurement of relative velocity
- 4.4.3 Measurement of boat velocity
- 4.4.4 Near boundary data collection
- 4.5 Speed of sound in water
- 5 Flow determination
- 5.1 General method
- 5.2 Measurement procedure
- 5.3 Method dealing with moving-bed condition without GNSS system
- 5.3.1 General
- 5.3.2 Stationary moving-bed method
- 5.3.3 Azimuth method
- 5.3.4 Subsection correction method
- 5.3.5 Loop method
- 5.3.6 Mid-section method
- 6 Site selection
- 6.1 General
- 6.2 Site-selection criteria
- 7 ADCP Deployment procedure
- 7.1 Deployment techniques
- 7.1.1 General
- 7.1.2 Manned boat mounted
- 7.1.3 Tethered boat
- 7.1.4 Deployment on a remote-control craft
- 7.1.5 Data retrieval modes
- 7.2 Operation of boat
- 7.2.1 Boat path
- 7.2.2 Boat speed
- 7.3 Field procedures
- 7.3.1 Pre-field procedures
- 7.3.2 Field setup
- 7.3.3 Reviewing ADCP data during measurement
- 7.3.4 Post measurement requirements
- 7.4 Ancillary equipment
- 7.5 Other consideration
- 7.5.1 Edge distances
- 7.5.2 Depth measurements at sites with high sediment concentrations
- 7.5.3 GNSS compass
- 7.6 Maintenance and ADCP checks
- 7.6.1 General
- 7.6.2 Built-in diagnostic check
- 7.6.3 Periodic major service in the manufacturer
- 7.6.4 Periodic ADCP performance check
- 7.6.5 Physical maintenance
- 7.6.6 Beam-alignment test
- 7.7 Training
- 8 Uncertainty
- 8.1 General
- 8.2 Definition of uncertainty
- 8.3 Uncertainties in ADCP measurements — General considerations
- 8.4 Sources of uncertainty
- 8.5 Minimizing uncertainties
- Annex A (informative) Velocity distribution theory and the extrapolation of velocity profiles
- Annex B (informative) Determination of edge discharges
- Annex C (informative) Example of an equipment check list
- Annex D (informative) Example of ADCP gauging field sheets
- Annex E (informative) Beam alignment test
- Annex F (informative) Uncertainty evaluation methods
- Bibliography [Go to Page]