BS ISO 26906-2015 Hydrometry Fishpasses at flow measurement structures《液体比重测定法 流量测量结构中的Fishpasses》.pdf
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1、BSI Standards PublicationBS ISO 26906:2015Hydrometry Fishpasses atflow measurement structuresBS ISO 26906:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 26906:2015. Itsupersedes BS ISO 26906:2009 which is withdrawn.The UK participation in its preparation
2、was entrusted to TechnicalCommittee CPI/113/2, Flow measurement structures.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapp
3、lication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 81111 1ICS 17.120.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Commi
4、ttee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 26906:2015 ISO 2015Hydrometry Fishpasses at flow measurement structuresHydromtrie chelles poissons auprs des structures mesurant le dbitINTERNATIONAL STANDARDISO26906Second edition2015-10-15Refe
5、rence numberISO 26906:2015(E)BS ISO 26906:2015ISO 26906:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any mean
6、s, 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 ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214
7、 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 26906:2015ISO 26906:2015(E)Foreword vIntroduction vi1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols 25 Principle 46 Installation . 46.1 Requirements for gauging structure a
8、nd fishpass installations . 46.1.1 Selection of site . 46.1.2 Installation conditions 56.1.3 Upstream channel . 66.1.4 Separate channel 66.1.5 Downstream channel . 76.1.6 Flow measurement and fishpass structures 76.1.7 Maintenance 76.1.8 Measurement of head 86.2 Requirements specific to the fishpass
9、. 86.2.1 General 86.2.2 Guidelines for basic parameters of fishpasses . 96.2.3 Location and attraction flows . 96.2.4 Downstream entry/exit to fishpass . 96.2.5 Upstream exit/entry from fishpass 107 Fishpass performance 107.1 General 107.1.1 Types . 107.1.2 Fishpasses with interconnected pools .107.
10、1.3 Fishpasses with continuous energy dissipation 107.1.4 Calibration and discharge coefficient .117.2 Larinier super-active baffle fishpass with baffle sizes between 75 mm and 150 mm .117.2.1 Description .117.2.2 The following features apply to the range of baffle sizes from 75 mm to 150 mm .127.2.
11、3 Limitations . 137.2.4 Modular flow calibration . 147.2.5 Modular limit .157.3 Pool-type fishpass with V-shaped overfalls. 157.3.1 Description .157.3.2 Determination of discharge under free flow conditions 187.3.3 Modular limit .217.3.4 Determination of discharge under submerged flow conditions 227
12、.3.5 Limitations . 237.3.6 Scaling up to standard design 237.4 Dutch pool and orifice fishpass 237.4.1 Description .237.4.2 Determination of discharge . 257.4.3 Scaling up the standard design . 278 Computation of discharge 278.1 Principles 278.2 Details 289 Uncertainties in flow determination 28 ISO
13、 2015 All rights reserved iiiContents PageBS ISO 26906:2015ISO 26906:2015(E)9.1 General 289.2 Combining uncertainties . 299.3 Uncertainty in the discharge coefficient u*(CDe)68for the fish-pass .309.4 Uncertainty in the effective head . 309.5 Uncertainty budget. 309.5.1 General. 309.5.2 Compound str
14、uctures sources of uncertainty .3110 Example .3110.1 Installation . 3110.2 Flow conditions . 3210.3 Computation of discharge 3210.3.1 Modularity 3210.3.2 Flow over the flat-V weir 3210.3.3 Flow through the fish-pass. 3310.3.4 Total flow . 3310.3.5 Uncertainty in flow through the fish-pass 3310.3.6 U
15、ncertainty in flow over the flat-V weir .3410.3.7 Uncertainty in total flow 3410.3.8 Reduction in overall uncertainty if second head gauge were to be installed upstream of the fish-pass 34Annex A (informative) Introduction to measurement uncertainty .35Annex B (informative) Performance guide for hyd
16、rometric equipment for use in technical standards.44Bibliography .48iv ISO 2015 All rights reservedBS ISO 26906:2015ISO 26906:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Inte
17、rnational 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 wi
18、th 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
19、, 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
20、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
21、 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 on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO
22、s adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 113, Hydrometry, Subcommittee SC 2, Flow measurement structures.This second edition cancels and replaces the fir
23、st edition (ISO 26906:2009), which has been technically revised. ISO 2015 All rights reserved vBS ISO 26906:2015ISO 26906:2015(E)IntroductionFlow gauging structures are commonly used for the determination of open channel flows. To operate satisfactorily, these structures require a head difference to
24、 be generated between the upstream and downstream water levels. At structures designed to operate in the modular flow range, an upstream head measurement is used to interpret flow rates. At structures designed to operate in both the modular and drowned flow ranges, the upstream head measurement is a
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