BS 3680-4G:1999
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 Flat-V weirs
Hardcopy , PDF
11-05-2002
English
03-15-1999
Committees responsible
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Characteristics of flat-V weirs
6 Installation
7 Maintenance
8 Measurement of head(s)
9 Discharge relationships
10 Computation of discharge
11 Uncertainties in flow measurement
12 Examples
Annex A (normative) Velocity distribution
Figure 1 Triangular profile flat-V weir
Figure 2 Examples of velocity profiles in the approach
channel
Figure 3 Arrangements for crest tappings
Tables
1 Ranges of discharge
2 Arrangements for crest tappings
3 Corrections to discharge coefficients
4 Summary of recommended coefficients, limitations and
tolerances
5 Evaluation of Zh, Zh in terms of Hle/h', Hle/H'
6 CvZh in terms of h'P1 and hle/h'
7 Cdr in terms of hpe/hle
8 CvCdr in terms of hpe/hle and hleh/'p1 = 0.0 up to and
including 0.5
9 CvCdr in terms of hpe/hle and hle/h, h'/P1 = greater
than 0.5 and up to and including 1.5
10 CvCdr in terms of hpe/hle and hle/h', h'/P1 = greater than
1.0 and up to and including 1.5
11 CvCdr in terms of hpe/hle and hle/h', h/P1 = greater than
1.5 and up to and including 2.0
12 CvCdr in terms of hpe/hle and hle/h', h'P1 = greater than
2.0 and up to and including 2.5
13 Cdr in terms of H2e/Hle
14 Example of modular discharge calculation
15 Example of modular discharge coefficients
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.