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SRPS ISO 18320:2021

Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship

Aug 31, 2021
Oct 31, 2023

General information

90.20     Jul 15, 2025

90.60    Dec 2, 2025

ISS

U113

International Standard

17.120.20  

English   Serbian  

Наслов на српском језику је унапређен и гласи "Хидрометрија — Мерење протока воде у отвореним токовима — Одређивање зависности водостај-проток"

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Scope

This document specifies methods of determining the stage?discharge relationship for gauging stations. It specifies an accuracy for defining the stage?discharge relationship based on a sufficient number of discharge measurements, complete with corresponding stage measurements.
This document considers stable and unstable channels and includes brief descriptions of the effects on the stage?discharge relationship of the transition from inbank to overbank flows, shifting controls, variable backwater and hysteresis. Methods of determining discharge for twin-gauge stations, ultrasonic velocity-measurement stations and other complex rating curves are not described in detail.
NOTE These types of rating curves are described separately in other International Standards, Technical Specifications and Technical Reports, which are listed in the Bibliography.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS ISO 1100-2:2017

NOW

PUBLISHED
SRPS ISO 18320:2021
90.20 Standard under periodical review
Jul 15, 2025

Related project

Adopted from ISO 18320:2020

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