International Organization for Standardization (ISO)
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ISO 9826:1992
Scope
Specifies methods of liquid flow measurement in open channels (particularly in irrigation canals) under steady or slowly varying flow conditions. The flumes used are designed to operate under both free-flow and submergence conditions.
ISO 9826:1992 history
1992ISO 9826:1992 Measurement of liquid flow in open channels; Parshall and SANIIRI flumes