EN ISO 25377:2022 PDF

Name: EN ISO 25377:2022 — Hydrometric uncertainty guidance (HUG) (ISO 25377:2020)
SKU: EN ISO 25377:2022
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Hydrometric uncertainty guidance (HUG) (ISO 25377:2020)

Название (английский):

EN ISO 25377:2022

Hydrometric uncertainty guidance (HUG) (ISO 25377:2020)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 80
Дата публикации:: 21 декабря 2022 г.
Издание:: CEN EN 25377 edition 2 version 1
ICS:: 17.120.20

Тип поставки:

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Язык документа:

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Срок поставки:14 раб. дн. (перевод)

Цена:1 200 €

Описание (английский):

This document provides an understanding of the nature of measurement uncertainty and its significance in estimating the "quality" of a measurement or a determination in hydrometry. This document is applicable to flow measurements in natural and man-made channels. Rainfall measurements are not covered.

Abstract

Overview

Key topics

Foundations and GUM linkage: aligns with ISO/IEC Guide 98-3 (the GUM) for basic definitions, probability distributions and rules for uncertainty evaluation.
Uncertainty modelling: treatment of random and systematic effects, combining uncertainties, and expressing results (including propagation of uncertainty).
Open-channel flow methods: detailed guidance for velocity–area methods (mean velocity, velocity measurement, integration and perimeter flow uncertainties) and critical-depth methods (head, geometry and iterative calculations).
Dilution and tracer methods: continuous feed and transient mass approaches for discharge estimation.
Instrumentation and performance: performance specifications, evaluation of manufacturer claims, and a performance guide for hydrometric equipment.
Practical tools and annexes: worked examples, Monte Carlo Simulation (MCS), Interpolated Variance Estimation (IVE), stage–discharge uncertainty analysis and velocity measurement guidance.
Standards drafting: guidance for writing uncertainty clauses in hydrometric technical standards.

Applications

EN ISO 25377 is designed for professionals who need rigorous, transparent uncertainty estimates for flow and discharge measurements:

Hydrologists and water-resource managers assessing monitoring network data quality.
Gauging-station operators calculating uncertainty for routine discharge measurements.
Environmental and regulatory bodies requiring documented uncertainty for compliance and reporting.
Consultants and engineering firms performing flow measurements for design, licensing or flood-risk studies.
Instrument manufacturers and testing laboratories validating performance claims.
Standards developers and researchers implementing uncertainty methods (including Monte Carlo approaches).

Practical uses include calibrating rating curves (stage–discharge relations), verifying measurement systems, informing flood forecasting models, water allocation decisions, and compiling defensible monitoring reports.

Related standards

ISO/IEC Guide 98-3 (GUM) - Evaluation of measurement uncertainty
ISO 25377:2020 (original international text) - adopted as EN ISO 25377:2022 by CEN

Keywords: hydrometric uncertainty, HUG, ISO 25377, EN ISO 25377:2022, flow measurement, open channel flow, velocity–area method, Monte Carlo simulation, stage–discharge uncertainty.

Технические детали

Технический комитет: CEN/TC 318 - Hydrometry
SKU: EN ISO 25377:2022

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ISO 25377:2020

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EN ISO 25377:2022 PDF

Abstract

Overview

Похожие стандарты

Key topics

Applications

Related standards

Технические детали

ISO 25377:2020

Hydrometric uncertainty guidance (HUG)

BS EN ISO 25377:2022

Hydrometric uncertainty guidance (HUG).

EN ISO 6599-1:2026

Packaging - Conditioning for testing - Part 1: Paper sacks (ISO 6599-1:2026)

EN ISO 4885:2026

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EN ISO/IEC 29151:2026

Information security, cybersecurity and privacy protection - Controls, requirements, and guidance for persona…

EN ISO 9693:2026

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EN ISO 26082-1:2026

Leather - Physical and mechanical test methods for the determination of soiling - Part 1: Rubbing (Martindale…

EN ISO/IEEE 11073-10101:2020/A1:2026

Health informatics - Device interoperability - Part 10101: Point-of-care medical device communication - Nomen…