Table of Contents

Foreword<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Symbols and abbreviated terms<br>5 Principle<br>6 Installation<br>7 Measurement of head<br>8 Maintenance<br>9 Rectangular thin-plate weir<br>10 Triangular-notch thin-plate weir<br>11 Uncertainties of flow measurement<br>12 Example<br>Annex A (informative) - Flow measurement with<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;small weir tanks<br>Annex B (normative) - Guide to the design and<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;installation of a flow straightener<br>Annex C (informative) - Introduction to measurement<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;uncertainty<br>Annex D (informative) - Sample measurement<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;performance for use in hydrometric worked<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;examples<br>Annex E (informative) - Specimen tables<br>Bibliography

Abstract

Describes the requirements for the use of rectangular and triangular (V-notch) thin-plate weirs for the measurement of flow of clear water in open channels under free flow conditions.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	British Standards Institution
Pages
ISBN
Committee	CPI/113/2
Supersedes	BS 3680-4A(1981) : 1981 16/30301971 DC : 0 05/30140799 DC : DRAFT OCT 2005