ISO 4360:2008 specifies methods for the measurement of the flow of water in open channels under steady flow conditions using triangular profile weirs. The flow conditions considered are steady flows which are uniquely dependent on the upstream head and drowned flows which depend on downstream as well as upstream levels.
BS ISO 4360:2008 history
2020BS ISO 4360:2020 Hydrometry. Open channel flow measurement using triangular profile weirs
2008BS ISO 4360:2008 Hydrometry - Open channel flow measurement using triangular profile weirs
1986BS 3680-4B:1986 Methods of measurement of liquid flow in open channels - Weirs and flumes - Triangular profile weirs
BS ISO 4360:2008 Hydrometry - Open channel flow measurement using triangular profile weirs has been changed from BS 3680-4B:1986 Methods of measurement of liquid flow in open channels - Weirs and flumes - Triangular profile weirs.