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AS 3778.2.2:2022
[Current]Measurement of water flow in open channels, Part 2.2: General — Selection, establishment and operation of a gauging station (ISO 18365:2013, IDT)
AS 3778.2.2:2022 identically adopts ISO 18365:2013, which gives requirements for the establishment and operation of a gauging station for the measurement of stage, or stage and discharge, of a lake, reservoir, river or canal or other artificial open channel. It also describes how a gauging station utilising one of the measurement methods listed should be operated and maintained.
Published: 10/06/2022
Pages: 5
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 General requirements and considerations
4.1 Requirements
4.2 Other constraints
5 Water level (Stage) only gauging stations
5.1 Preliminary survey and selection criteria
5.1.1 General
5.1.2 Preliminary survey
5.1.3 Selection criteria
5.2 Stage measurement and recording
5.2.1 General
5.2.2 Vertical staff gauge
5.2.3 Ramp or inclined gauge
5.2.4 Wire or tape weight gauge
5.2.5 Other methods
5.2.6 Stage recording
6 Stage-discharge gauging stations
6.1 General
6.2 Main elements of a stage-discharge gauging station
6.2.1 General
6.2.2 Control section or control reach
6.2.3 Section suitable for discharge measurements
6.2.4 Discharge measurements
6.2.5 Tracer dilution methods for measuring discharge
7 Stage- discharge gauging stations using hydraulic structures
7.1 General
7.2 Site selection
7.3 Types of hydraulic structures
8 Velocity-discharge gauging stations
8.1 Applications and types of instrument
8.2 Site selection
8.3 Calibration
8.4 Transit time (acoustic) method
8.5 Doppler
8.6 Acoustic (echo) correlation velocity meters
8.7 Electromagnetic method (Full channel width coil)
9 Measurement under difficult conditions
9.1 Ice and frost conditions
9.1.1 General
9.1.2 Stilling well
9.1.3 Diaphragm pressure sensor
9.2 Weed growth
9.3 Extreme sedimentation conditions
10 Operation and maintenance
10.1 General
10.2 Water level (Stage) only gauging stations
10.3 Stage-discharge gauging stations
10.4 Stage-discharge gauging stations using hydraulic structures
10.5 Velocity-discharge gauging stations
Annex A
Bibliography
Cited references in this standard
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