SIST-TP CWA 17916:2022

SLOVENSKI STANDARD
SIST-TP CWA 17916:2022
01-november-2022
Ukoreninjenje motečih (tujerodnih) vodnih rastlin - Nadzor z metodo grabljenja s
čolnom
Rooting nuisance (alien) aquatic plants - Control by means of rake method with a boat
Krautung von störenden (artfremden) Wasserpflanzen - Verfahren mittels Rechen und
Mähboot
Ta slovenski standard je istoveten z: CWA 17916:2022
ICS:
07.060 Geologija. Meteorologija. Geology. Meteorology.
Hidrologija Hydrology
13.060.10 Voda iz naravnih virov Water of natural resources
SIST-TP CWA 17916:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CWA 17916:2022

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SIST-TP CWA 17916:2022


CEN
CWA 17916

WORKSHOP
September 2022

AGREEMENT


ICS 03.220.40; 47.060
English version


Rooting nuisance (alien) aquatic plants - Control by means
of rake method with a boat
This CEN Workshop Agreement has been drafted and approved by a Workshop of representatives of interested parties, the
constitution of which is indicated in the foreword of this Workshop Agreement.

The formal process followed by the Workshop in the development of this Workshop Agreement has been endorsed by the
National Members of CEN but neither the National Members of CEN nor the CEN-CENELEC Management Centre can be held
accountable for the technical content of this CEN Workshop Agreement or possible conflicts with standards or legislation.

This CEN Workshop Agreement can in no way be held as being an official standard developed by CEN and its Members.

This CEN Workshop Agreement is publicly available as a reference document from the CEN Members National Standard Bodies.

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, Türkiye 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 worldwide for CEN national Members.


Ref. No.:CWA 17916:2022 E

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CWA 17916:2022 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements imposed on parties and equipment . 7
4.1 Client . 7
4.2 Contractor . 7
4.3 External ecological expert . 8
4.4 Equipment . 8
5 Protocol . 9
5.1 Step 1 Survey of future work area and awarding the order . 9
5.2 Step 2 Survey the vegetation . 9
5.3 Step 3 Prepare a work plan . 9
5.4 Step 4 Choice of rake . 10
5.5 Step 5 Determining the direction of the work . 10
5.6 Step 6 Complete documentation before and during the work . 11
5.7 Step 7 Check the craft for the absence of plant fragments . 11
5.8 Step 8 LMRA and checklist prior to starting raking . 11
5.9 Step 9 Launching the craft . 11
5.9.1 With a slow-traffic trailer . 11
5.9.2 With a mobile crane . 11
5.10 Step 10 Start of the work . 12
5.10.1 Raking. 12
5.10.2 Clean up . 13
5.10.3 Refuelling/maintenance . 13
5.11 Step 11 Cleaning the craft. 14
5.12 Step 12 Sign the documents and complete the order . 14
Annex A (normative) Preparatory actions to determine the content of the work plan with
an ecological work protocol . 15
Annex B (informative) Rake specification . 16
B.1 Choice of rake tines . 16
B.2 Specification of the tines. 16
B.2.1 Coarse tines, 30 cm long . 16
B.2.2 Small tines, 15 cm long . 16
Annex C (normative) Checklist before starting raking . 17
C.1 Documents . 17
C.2 Maintenance . 17
Bibliography . 18

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CWA 17916:2022(E)
European foreword
This CEN Workshop Agreement (CWA 17916:2022) was developed in accordance with CEN-CENELEC
Guide 29 “CEN/CENELEC Workshop Agreements – A rapid prototyping to standardization” and with the
relevant provisions of CEN/CENELEC Internal Regulations - Part 2. It was approved by a Workshop of
representatives of interested parties on 2022-06-22, the constitution of which was supported by CEN
following a public call for participation made on 2022-04-04. However, this CEN Workshop Agreement
does not necessarily include all relevant stakeholders.
The final text of CWA 17916:2022 was submitted to CEN for publication on 2022-07-15.
The following organizations and individuals developed and approved this CEN Workshop Agreement:
— Environment Agency: Jonathan Newman, Trevor Renals
— French IAS Resource Center: Alain Dutartre
— Harkboot.nl B.V.: Leon Sterk, Veronique Jeunhomme
— IUCN: Kevin Smith
— Netherlands Food and Consumer Product Safety Authority: Johan van Valkenburg
— Université Lorraine: Elisabeth Gross
— Roelf Pot Research and Consultancy: Roelf Pot
— Sportvisseij Nederland: Willie van Emmerik
— Sportvisserij Groningen Drente: Henk Mensinga
— Harkboot.nl B.V.: Leon Sterk, Veronique Jeunhomme
Attention is drawn to the possibility that some elements of this document may be subject to patent rights.
CEN-CENELEC policy on patent rights is described in CEN-CENELEC Guide 8 “Guidelines for
Implementation of the Common IPR Policy on Patent”. CEN shall not be held responsible for identifying
any or all such patent rights.
Although the Workshop parties have made every effort to ensure the reliability and accuracy of technical
and non-technical descriptions, the Workshop is not able to guarantee, explicitly or implicitly, the
correctness of this document. Anyone who applies this CEN Workshop Agreement shall be aware that
neither the Workshop, nor CEN, can be held liable for damages or losses of any kind whatsoever. The use
of this CEN Workshop Agreement does not relieve users of their responsibility for their own actions, and
they apply this document at their own risk. The CEN Workshop Agreement should not be construed as
legal advice authoritatively endorsed by CEN/CENELEC.
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Introduction
This CWA describes how a rake method with a boat should be used to remove nuisance rooting aquatic
plants. The rake method is an effective but drastic method to reduce the number of aquatic plants in
waterways, and therefore it should be applied correctly. The rake method can produce a long-lasting
solution for an excess of native rooted aquatic plants and alien rooted aquatic plants [invasive alien
species]. The rake method takes account of the wellbeing of aquatic fauna, including fishhealth, and
preventing unnecessary fish mortality.
For water-management clients, this document is intended as a guideline for having maintenance work
and the full or partial removal of aquatic plants including roots carried out in a sustainable and
ecologically responsible manner.
Contractors that comply with this standard may state this and use it to obtain an award advantage during
tenders.
SDGs
This document makes a contribution to the following Sustainable Development Goals (SDGs) that were
agreed by the United Nations:
— SDG 6 'Clean water and sanitation';
— SDG 13 'Climate action';
— SDG 14 'Life below water';
— SDG 15 'Life on land'.
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1 Scope
This document describes a rake method with a boat for removing nuisance rooting aquatic plants and for
managing their growth. It also describes the requirements for this method, and sets out how work should
be carried out in the field.
The rake method can be used for inland waterways with a depth of 0.6 m or more.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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, Water quality – Guidance standard for assessing the hydromorphological features of rivers
EN 15460, Water quality – Guidance standard for the surveying of macrophytes in lakes
EN 15940, Automotive fuels – Paraffinic diesel fuel from synthesis or hydrotreatment – Requirements and
test methods
ISO 15380, Lubricants, industrial oils and related products (class L) – Family H (Hydraulic systems) –
Specifications for hydraulic fluids in categories HETG, HEPG, HEES and HEPR
ASTM D8029-18, Standard Specification for Biodegradable, Low Aquatic Toxicity Hydraulic Fluids
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
operations consultant
adequately trained person in the area of aquatic ecology and vegetation who provides advice on removing
aquatic plants
NOTE 1 to entry: national legislation may exist. If the operations consultant complies with the requirements of
Article 3.4 of the Code of Conduct Nature Conservancy for Water Boards, this person may also act as an ecological
expert.
3.2
Basic Safety SCC
B-SCC
certification in the area of health and safety at work, focused on employees who work in a hazardous
environment without a leadership role
3.3
CE marking
marking for a product that complies with the applicable rules within the European Economic Area
3.4
sustainability
being financially and ecologically responsible in the long term
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3.5
ecological expert
person who is formally trained in the field and/or is recognized by an authoritative organisation as such
NOTE 1 to entry: in some countries legislation exists, e.g. in the Netherlands requirements are imposed by Article
3.4 of the Code of Conduct Nature Conservancy for Water Boards
3.6
ecological work protocol
protocol that describes how damage to protected or unprotected flora and fauna is prevented or limited
(mitigated) to an acceptable level during the work
3.7
Most economically advantageous tender
MEAT
tender where not only the price, but qualitative and/or social factors form part of the award criteria
3.8
external monitoring
systematic tracking of developments in the ecological and general quality of the raked area by a third
party
3.9
rake method
method of using a rake to remove rooting aquatic plant, roots and all
3.10
hydrotreated vegetable oil 100 %
HVO 100
unmixed biodiesel made of waste vegetable oil and waste oil that was treated with hydrogen in
accordance with EN 15940
3.11
Last Minute Risk Analysis
LMRA
final check before starting the work to make sure the situation is safe
NOTE 1 to entry: This is a requirement imposed by the SCC certificate.
3.12
Dredge type developed by Satake 1987
aquatic plant sampling tool that is a type of rake where the tines are on a ring and point in the direction
of the line
3.13
shipping inspectorate quality label
NSI quality label
safety quality label for professionally used vessels and seagoing pleasure craft that are smaller than 24 m
3.14
Health, Safety and Environment Checklist for Contractors
SCC certificate
certificate based on a management system to guarantee safety during work, which describes all the risks,
control measures and the action plan for permanent workplaces
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3.15
(provisional) community inland navigation certificate
(p)CINC
compulsory provisional certificate for floating equipment to sail on European waters
3.16
SCC for operational managers
SOS-SCC
certificate for health and safety at work, focused on managerial employees and self-employed persons
3.17
double-headed garden rake
aquatic plant sampling tool that is a type of rake that consists of two rake heads bound or welded together
back to back, and attached to a line of at least 10 m
3.18
alien species
any live specimen of a species, subspecies or lower taxon of animals, plants, fungi or micro- organisms
introduced outside its natural range; it includes any part, gametes, seeds, eggs or propagules of such
species, as well as any hybrids, varieties or breeds that might survive and subsequently reproduce;
[SOURCE: Regulation (EU) No 1143/2014 of the European Parliament and of the Council of 22 October
2014 on the prevention and management of the introduction and spread of invasive alien species]
3.19
invasive alien species
alien species whose introduction or spread has been found to threaten or adversely impact upon
biodiversity and related ecosystem services;
[SOURCE: Regulation (EU) No 1143/2014 of the European Parliament and of the Council of 22 October
2014 on the prevention and management of the introduction and spread of invasive alien species]
4 Requirements imposed on parties and equipment
4.1 Client
The client shall comply with the MEAT criterion for tendered services for CO reductions based on e.g.
2
ISO 14001 or other ISO standards related to the prevention, reduction and/or mitigation of CO
2
emissions
4.2 Contractor
The contractor shall:
a) Have implemented a certified CO management system;
2
b) Work on the basis of a work plan with an ecological work protocol that is prepared by an ecological
expert in accordance with any national legislation that may exist, e.g. in the Netherlands that would
be Article 3.4 of the Code of Conduct Nature Conservancy for Water Boards; see Annex A for the
points of attention;
c) Have at least a SCC certificate.
Operational staff shall at least:
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a) Have B-SCC or SOS-SCC in function of their job;
b) Have proven knowledge of the effect of their work on the ecology, where aquatic plant recognition
and identifying anoxia are key to safeguarding and improving biodiversity and preventing fish
mortality;
c) Work in accordance that with any legislation that may apply, e.g. in the Netherlands with the Code of
Conduct Nature Conservancy for Water Boards.
Chief Engineers of the craft shall:
a) Comply with the requirements for operational staff;
b) If required for the area and the specific craft: have a boatmaster's certificate 1 and/or 2;
c) Be able to recognise and distinguish alien plants;
d) Scored a pass for the practical assessment of knowledge and skills required to operate a rake boat
(e.g. on the basis of a course organised by the company of the contractor);
e) Work safely with the rake method and sail safely, in accordance with the requirements in section 5
of this document.
4.3 External ecological expert
An external ecological expert may be consulted to determine the types of aquatic plants that are present
and to what extent. If the present species are expected to include alien species that could be easily
confused with other natural species, an external ecological expert has to be engaged to identify the
species.
Monitoring the species of aquatic plants takes place if required by the client.
The external ecological expert uses the following procedure for identification and monitoring:
1) Take random samples of the aquatic plants in the stretch that needs to be cleaned up and identify
them. Use a garden rake on a long handle, a double-headed garden rake, or a dredge type developed
by Satake 1987 as a sampling tool. Sample from the bank or from a craft, depending on the
dimensions of the water.
2) Take at least twenty samples in the work area. If there are areas with distinctive morphological or
ecological features, take at least three samples per distinctive area.
3) On the basis of the sample, prepare an estimate of the total cover of the submerged aquatic plants
and of the individual species. For a linear water, estimate the cover of the waterway. In the case of
clear zoning, estimate the cover and the fill per zone.
4) Use the working method described in EN 14614, EN 15460, and other relevant national standards.
5) Send the results of the surveys to the client and the contractor.
4.4 Equipment
The contractor’s equipment (craft and rake) should comply with one of the following requirements:
— The equipment is certified on the basis of the community inland navigation certificate.
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— There is an application statement for the certification of existing floating equipment available for the
equipment.
— The equipment is certified in accordance with the requirements of the (provisional) community
inland navigation certificate ((p)CINC).
The equipment also complies with the following:
— The equipment is proven to comply with statutory requirements, such as CE marking and the NSI
quality label.
— The manufacturer’s technical construction file is complete and is avai
...