BS 3680-4D:1989
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Methods of measurement of liquid flow in open channels. Weirs and flumes Compound gauging structures
Hardcopy , PDF
15-08-2000
English
31-12-1989
Foreword
Committees responsible
Methods
1. Scope
2. Definitions and symbols
3. Characteristics of compound gauging structures
4. Installation
5. Maintenance
6. Measurement of head
7. Computation of discharge
8. Errors in flow measurement
Appendices
A. Velocity distribution
B. Drowned (non-modular) flow
C. Examples of calculations
Tables
1. Values of Cv in terms of f (h1 / h1 + P)
2. Modular dicharge (in m(cubed)/s) are a compound
weir per metre of crest in terms of upstream head
Figures
1. Examples of velocity profiles in the approach channel
2. Example of compound weir design
3. Details of crest tappings for triangular profile
weirs
4. Drowned flow characteristics expressed in terms of
hp/H1 and H2/H1 versus f
5. Drowned flow reduction factor f in terms of
hp/h1 and (h1 / h1 + P b/B)
Important note : All end users must be registered with an Account prior to user licenses being assigned.Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.