AS 3778.3.7-2007

Table of Contents

1 -  AS 3778.3.7-2007 Measurement of water flow in open channels Part 3.7: Velocity-area methods - Measurement by ultrasonic (acoust
4 -  PREFACE
5 -  CONTENTS
7 -  1 Scope
7 -  2 Normative references
7 -  3 Terms and definitions
7 -  4 Applications
7 -  4.1 Open channels
8 -  4.2 Multiple channels
8 -  4.3 Closed conduits
9 -  5 Method of measurement
9 -  5.1 Discharge
9 -  5.2 Calculation of discharge from the transit-time measurement
9 -  6 Flow velocity determination by the ultrasonic (transit time) method
9 -  6.1 Principle
12 -  6.2 Sound propagation in water
16 -  7 Gauge configuration
16 -  7.1 General
17 -  7.2 Single-path systems
18 -  7.3 Multi-path systems
18 -  7.4 Crossed-path systems
20 -  7.5 Reflected-path systems
21 -  7.6 Systems using transponders
22 -  7.7 Systems using divided cross-sections
23 -  7.8 Sloping paths
23 -  8 Calculation of discharge
23 -  8.1 Single-path systems
23 -  8.2 Multi-path systems
27 -  8.3 Systems with transducers in the channel
27 -  9 System calibration
27 -  9.1 General
28 -  9.2 Single-path systems
30 -  10 Site selection
30 -  10.1 Practical constraints
31 -  10.2 Physical constraints of the measurement site
31 -  10.3 Physical constraints which are distant from the measurement site
32 -  11 Site survey - Before design and construction
32 -  11.1 General
32 -  11.2 Visual survey
33 -  11.3 Survey of the cross-section
33 -  11.4 Survey of velocity distribution
34 -  11.5 Survey of signal propagation
34 -  11.6 Other survey activities
34 -  12 Operational measurement requirements
34 -  12.1 General
35 -  12.2 Basic components of flow determination
35 -  12.3 Water velocity determination
35 -  12.4 Determination of water stage or depth
36 -  12.5 Channel width
36 -  13 Gauging station equipment
36 -  13.1 General
37 -  13.2 Design and construction of equipment
38 -  13.3 Reflectors
41 -  13.4 Civil engineering works
41 -  13.5 Signal timing and processing
43 -  13.6 System self-checking
44 -  13.7 Site-specific data (or site parameters)
44 -  13.8 Clock and calendar
44 -  13.9 System performance criteria
46 -  13.10 System output
46 -  13.11 Installation
47 -  13.12 Commissioning
47 -  13.13 Operating manual
47 -  13.14 Maintenance
49 -  14 Measurement uncertainties
49 -  14.1 General
49 -  14.2 Definition of uncertainty
50 -  14.3 Uncertainty in discharge
56 -  Bibliography

Abstract

This Standard is identical to and reproduced from ISO 6416:2004, Hydrometry-Measurement of discharge by ultrasonic (acoustic) method.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
Pages
ISBN
Committee	CE-024
Supersedes	AS 3778.3.7-2001 DR 07108 CP