0

ISO 9123:2017

Hydrometry — Stage-fall-discharge relationships ISO 9123:2017

Publication date:   Oct 30, 2017

General information

90.93 Standard confirmed   Mar 7, 2023

ISO

ISO/TC 113/SC 1 Velocity area methods

International Standard

17.120.20   Flow in open channels

Buying

Published

Language in which you want to receive the document.

Scope

ISO 9123:2017 specifies methods for determining stage-fall-discharge relationships for a stream reach where variable backwater occurs either intermittently or continuously. Two gauging stations, a base reference gauge and an auxiliary gauge are required for gauge height measurements. A number of discharge measurements are required in order to calibrate the rating to the accuracy required by this document.
The preparation of rating curves is not described in detail in this document.
NOTE For a more detailed description of preparing rating curves, see the methods described in ISO 1100‑2.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 9123:2001

NOW

PUBLISHED
ISO 9123:2017
90.93 Standard confirmed
Mar 7, 2023