EN ISO 772:2022
(Main)Hydrometry - Vocabulary and symbols (ISO 772:2022)
Hydrometry - Vocabulary and symbols (ISO 772:2022)
This document defines terms and symbols used in standards in the field of hydrometry.
Hydrometrie - Begriffe und Symbole (ISO 772:2022)
Hydrométrie - Vocabulaire et symboles (ISO 772:2022)
Le présent document définit les termes et symboles utilisés dans les normes couvrant le domaine de l'hydrométrie.
Hidrometrija - Slovar in simboli (ISO 772:2022)
Ta dokument opredeljuje izraze in simbole, ki se uporabljajo v standardih na področju hidrometrije.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN ISO 772:2011
Hidrometrija - Slovar in simboli (ISO 772:2022)
Hydrometry - Vocabulary and symbols (ISO 772:2022)
Hydrometrie - Begriffe und Symbole (ISO 772:2022)
Hydrométrie - Vocabulaire et symboles (ISO 772:2022)
Ta slovenski standard je istoveten z: EN ISO 772:2022
ICS:
01.040.17 Meroslovje in merjenje. Metrology and measurement.
Fizikalni pojavi (Slovarji) Physical phenomena
(Vocabularies)
17.120.20 Pretok v odprtih kanalih Flow in open channels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 772
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 01.040.17; 17.120.20 Supersedes EN ISO 772:2011
English Version
Hydrometry - Vocabulary and symbols (ISO 772:2022)
Hydrom?rie - Vocabulaire et symboles (ISO 772:2022) Hydrometrie - Begriffe und Symbole (ISO 772:2022)
This European Standard was approved by CEN on 5 February 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 772:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 772:2022) has been prepared by Technical Committee ISO/TC 113
"Hydrometry" in collaboration with Technical Committee CEN/TC 318 “Hydrometry” the secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 772:2011.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 772:2022 has been approved by CEN as EN ISO 772:2022 without any modification.
INTERNATIONAL ISO
STANDARD 772
Sixth edition
2022-02
Hydrometry — Vocabulary and
symbols
Hydrométrie — Vocabulaire et symboles
Reference number
ISO 772:2022(E)
ISO 772:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 772:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Terms related to velocity-area methods .13
5 Terms related to flow measurement structures .17
6 Terms related to dilution method .30
7 Terms related to instruments and equipment .32
8 Terms related to sediment transport .38
9 Terms related to precipitation . 44
10 Terms related to snow .45
11 Terms related to groundwater .51
12 Terms related to uncertainties in hydrometric determinations .61
Annex A (informative) Symbols used in hydrometry .70
Bibliography .73
Index .74
iii
ISO 772:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 113, Hydrometry, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 318, Hydrometry, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This sixth edition cancels and replaces the fifth edition (ISO 772:2011) which has been technically
revised. The main changes compared with the previous edition are as follows:
— terms related to precipitation have been added in a new Clause 9;
— additional terms have been added in Clause 10;
— Figures 1, 3, 4, 5, 6, 9, 11 and 12 have been modified and updated.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO 772:2022(E)
Introduction
In the preparation of this document, the following principles were adopted wherever possible:
a) to standardize suitable terms and symbols without perpetuating unsuitable ones;
b) to discard any term or symbol with differing meanings in different countries, or for different
people, or for the same person at different times, and to replace that term or symbol by one which
has an unequivocal meaning;
c) to exclude terms which are self-evident.
Terms in existing International Standards have been included as much as possible; however, these
terms can be subject to future amendments.
NOTE Similar or identical terms can have separate definitions under the different categories.
It is recognized that it is not possible to produce a complete set of definitions which will be universally
acceptable, but it is hoped that the definitions provided and the symbols used will find widespread
acceptance and that their use will lead to a better understanding of hydrometric practices.
The terminology entries are presented in systematic order, grouped into sections according to
particular methods of determination or in relation to particular subjects. Annex A lists the symbols
used in this document.
The structure of each entry is in accordance with the ISO 10241 series. Country codes are in accordance
with ISO 3166-1.
v
INTERNATIONAL STANDARD ISO 772:2022(E)
Hydrometry — Vocabulary and symbols
1 Scope
This document defines terms and symbols used in standards in the field of hydrometry.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
hydrometry
science and practice of measuring the components of the hydrological cycle (3.92), including rainfall
(9.10), water level (3.64), flow and sediment transport (8.2) of surface waters, and groundwater (11.1)
characteristics
3.2
hydrology
science that deals with the waters above and below the land surfaces of the Earth, their occurrence,
circulation and distribution, their properties and their reaction with the environment
3.3
flow
water flowing on or below the land surface under gravitational influence
3.4
runoff
volume of water flowing through a given channel cross-section related to a given drainage basin (3.103)
in a defined period of time
3.5
discharge
Q
volume of water flowing through a given channel cross-section in unit time
3.6
current
directed movement of water
3.7
steady flow
flow (3.3) in which
...
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