AS 3778.2.5:2022 identically adopts ISO 8368:2019, which gives guidelines for selecting a particular type of flow measuring structure for measuring liquid flow in an open channel. It describes how the individual structures function in simple non-technical terms, and sets out the factors and parameters to take into account in order to make an informed decision on which type of structure to use.
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Types of structure
5.1 General
5.2 Thin-plate weirs
5.3 Broad-crested weirs
5.4 Triangular-profile weirs
5.4.1 General
5.4.2 Streamlined triangular-profile weirs
5.4.3 Flat-V weirs
5.5 Trapezoidal-profile weirs
5.6 Flumes
5.7 End-depth method
5.8 Vertical underflow gates and radial gates
5.9 Compound gauging structures
5.10 Fish passes
6 Factors affecting choice
6.1 General
6.2 Intended purpose of the structure
6.3 Range of flow to be measured
6.4 Accuracy to which the flow is to be measured
6.5 Consideration of afflux and potential for submergence
