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1、a Date: 30 July 2008 Origin: European Latest date for receipt of comments: 31 October 2008 Project no.: 2008/01568 Responsible committee: EH/3/5 Biological Methods Interested committees: Title: Draft BS EN 15843 Water quality - Guidance standard on determining the degree of modification of river hyd
2、romorphology Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS
3、IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 October 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf f
4、or information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to disseminati
5、on by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating org
6、anizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI
7、 web site http:/. Direct tel: 020 8996 7186 Responsible Committee Secretary: Dr R A Wellings (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30182311 DC Licensed CopyChinese Uni
8、versity of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on European discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no commen
9、ts are received to the contrary, then the UK will approve this draft and implement it as a British Standard. Comment is particularly welcome on national, legislative or similar deviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary suppo
10、rt in Europe, the UK will be obliged to publish the official English Language text unchanged as a British Standard and to withdraw any conflicting standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guid
11、ance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the ad
12、dress given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments su
13、bmitted should be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/ Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xx
14、xxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous
15、and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are
16、 registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM DRAFT prEN 15843 July 2008 ICS 13.060.45 English Version Water quality - Guidance
17、standard on determining the degree of modification of river hydromorphology Wasserbeschaffenheit - Anleitung zur Beurteilung des Zustands von Fliegewssern auf der Grundlage hydromorphologischer Eigenschaften This draft European Standard is submitted to CEN members for enquiry. It has been drawn up b
18、y the Technical Committee CEN/TC 230. If this draft becomes a European Standard, 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. This draft European St
19、andard was established by CEN 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 Management Centre has the same status as the official versions. CEN members a
20、re the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switz
21、erland and United Kingdom. Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation. Warning : This document is not a European Standard. It is distributed for review and comments. I
22、t is subject to change without notice and shall not be referred to as a European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by
23、 any means reserved worldwide for CEN national Members. Ref. No. prEN 15843:2008: E Licensed CopyChinese University of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI prEN 15843:2008 (E) 2 Contents Page Foreword3 Introduction.3 1 Scope 3 2 Normative references4 3 Terms and definitions .4 4 P
24、rinciple7 5 Determining the hydromorphological modifications of rivers8 6 Interpreting and reporting hydromorphological modifications9 Annex A (normative) Characterization of river modification based on hydromorphological features.12 Annex B (informative) Some key points in the development of this E
25、uropean Standard .23 Introduction.23 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI prEN 15843:2008 (E) 3 Foreword This document (prEN 15843:2008) has been prepared by Technical Committee CEN/TC 230 “Water analysis”, the secretariat of which is held by DIN
26、. This document is currently submitted to the CEN Enquiry. WARNING Safety issues are paramount when surveying rivers. Surveyors should conform to EU and national Health and Safety legislation, and any additional guidelines appropriate for working in or near rivers. Introduction This European Standar
27、d will enable broad comparisons to be made of river hydromorphological modifications throughout Europe (e.g for reporting by the European Environment Agency). The assessment of river quality in Europe has evolved over the past 20 years. From its original focus on organic pollution it now relies on m
28、ethods for analysing a range of chemical and biological attributes. More recently, several European countries have developed systems for evaluating the hydromorphological features of rivers. The EC Water Framework Directive (WFD) has reinforced the need for this broader view of river quality through
29、 its requirement for determining ecological status based on macrophytes, phytobenthos, invertebrates and fish. The Directive also requires that hydromorphological and physico-chemical conditions should be suitable for supporting biological communities, although hydromorphology is only classified at
30、high status. The Guidance standard for assessing the hydromorphological features of rivers (EN 14614) describes a protocol for field survey and feature recording, whereas this standard gives guidance on assessing the modification of river hydromorphological features. It focuses especially on human p
31、ressures that affect rivers; thus, it may be helpful for implementing the WFD by indicating the extent to which these pressures might have caused a departure from hydromorphological reference conditions. Although the procedure described in this standard enables the hydromorphological characterizatio
32、n of rivers, it does not attempt either to describe methods for defining high status for hydromorphology under the WFD or to link broadscale hydromorphological classification to assessments of ecological status. In addition to its relevance to the WFD this standard has applications also for land-use
33、 planning, nature conservation, environmental impact assessment, river basin management, flood risk assessment (e.g. the EC Floods Directive) and setting targets for river restoration work. 1 Scope This European Standard provides guidance on characterizing the modifications of river hydromorphologic
34、al features described in EN 14614. The standard enables consistent, broad-based characterization across a wide spectrum of hydromorphological modification of river channels, banks, riparian zones and floodplains. Its primary aim is to assess departure from naturalness as a result of human pressures
35、on river hydromorphology, and suggests suitable sources of information which may contribute to characterizing the modification of hydromorphological features. In doing so, it does not replace methods that have been developed for local assessment and reporting. Decisions on river management for indiv
36、idual reaches or catchments require expert local knowledge and vary according to river type. Licensed CopyChinese University of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI prEN 15843:2008 (E) 4 2 Normative references The following referenced documents are indispensable for the applicatio
37、n of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14614:2004, Water quality Guidance standard for assessing the hydromorphological features of rivers EN 14996:2006, Wa
38、ter quality Guidance on assuring the quality of biological and ecological assessments in the aquatic environment CEN/TC 230/WG 2/TG 6 N59, Water quality Guidance standard on the design and analysis of interlaboratory comparison studies for ecological assessment 3 Terms and definitions For the purpos
39、es of this document, the following terms and definitions apply. 3.1 aquatic macrophytes larger plants of fresh water which are easily seen with the naked eye, including all aquatic vascular plants, bryophytes, stoneworts (Characeae) and macro-algal growths NOTE This definition includes plants associ
40、ated with open water or wetlands with shallow water. EN 14614:2004, 2.1 3.2 attribute a specific recorded element of a hydromorphological feature (e.g. boulders and silt are substrate attributes; sheet piling and gabions are attributes of engineered banks) EN 14614:2004, 2.2 3.3 bank permanent side
41、of a river or island, which is above the normal water level and only submerged during periods of high river flow NOTE In the context of this European Standard, the top is marked by the first major break in slope, above which cultivation or development is possible EN 14614:2004, 2.4 3.4 berm natural
42、or artificial shelf within a river that is exposed above water level during low flows, but is submerged during high flows EN 14614:2004, 2.6 3.5 bog a wetland, fed by atmospheric precipitation, in which the vegetation communities (frequently dominated by Sphagnum mosses) form peat over long periods
43、of time EN 14614:2004, 2.7 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI prEN 15843:2008 (E) 5 3.6 braiding course of a river naturally divided by deposited sediment accumulations, characterised by at least two channels which often change their course reg
44、ularly EN 14614:2004, 2.8 3.7 compaction consolidation of the river bed through physical, chemical or biological processes EN 14614:2004, 2.10 3.8 culvert arched, enclosed or piped structures constructed to carry water under roads, railways and buildings 3.9 ecological status an expression of the qu
45、ality of the structure and functioning of aquatic ecosystems, expressed by comparing the prevailing conditions with reference conditions NOTE As classified in accordance with Annex V of the EC Water Framework Directive EN 14614:2004, 2.12 3.10 floodplain the valley floor adjacent to a river that is
46、(or was historically) inundated periodically by flood waters EN 14614:2004, 2.14 3.11 gabion wire basket containing stones, used for river-bed or bank protection EN 14614:2004, 2.16 3.12 hard materials/engineering bank protection using artificial materials such as concrete, sheet piling or bricks (c
47、f soft materials) 3.13 hydromorphology the physical and hydrological characteristics of rivers EN 14614:2004, 2.18 3.14 hydro-peaking rapid and frequent fluctuations in flow resulting from hydropower generation to meet peak demands in electricity 3.15 lateral connectivity the freedom for water to mo
48、ve between the channel and the floodplain EN 14614:2004, 2.19 Licensed CopyChinese University of Hong Kong, 21/10/2008 08:12, Uncontrolled Copy, (c) BSI prEN 15843:2008 (E) 6 3.16 lateral movement the freedom for a river channel to move across a floodplain EN 14614:2004, 2.20 3.17 planform view of r
49、iver pattern from above (e.g. sinuous, straight) EN 14614:2004, 2.22 3.18 reach a major sub-division of a river, defined by physical, hydrological, and chemical character that distinguishes it from other parts of the river system upstream and downstream EN 14614:2004, 2.25 3.19 reference conditions conditions representing a totally undisturbed state, lacking human impact, or near-natural with only minor evidence