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dc.contributor.authorMilner, Victoria S-
dc.contributor.authorGilvear, David-
dc.contributor.authorWillby, Nigel-
dc.description.abstractRiver classification is a useful tool for researchers and managers wishing to organise, to simplify and to understand the forms and processes within freshwater systems. Many classifications require surveyors to classify reaches into specific channel types in a field environment. Channel types should be identifiable on the basis of a field surveyor's judgement of channel characteristics and landscape settings; these include channel planform, valley confinement, dominant bed material and/or instream geomorphic features (e.g. gravel bars). An accurate classification of reaches into the correct channel type is important to ensure consistency in management strategies and to assess the impact of engineering activities on the physical and ecological status of rivers. In this article, we examine the variation in professional judgement of geomorphologically based channel types by scientists with different disciplinary backgrounds and varying levels of involvement in classification systems using a photo-questionnaire. Results indicate that there can be a large level of discrepancy in typing rivers; the choice of the modal channel type for each reach varied between 25.9% and 75.1% of the respondent selections. There were also differences in the level of agreement between earth scientists (with hydrogeomorphological or geological training), ecological scientists (with freshwater biology training) and practitioners involved in river conservation and management. A high level of experience in classification systems translates to a lower number of channel types being chosen per reach. In response to these results, the use of a photographic approach to typing needs to be fully tested and users fully trained before operational use. Furthermore, we advocate that designers of geomorphic typologies should aim to have a representative and workable number of classes within a typology with an emphasis for rationalisation of classes rather than expansion of numbers.en_UK
dc.relationMilner VS, Gilvear D & Willby N (2013) An assessment of variants in the professional judgement of geomorphologically based channel types, River Research and Applications, 29 (2), pp. 236-249.-
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.-
dc.subjectchannel typeen_UK
dc.subjectprofessional judgementen_UK
dc.subjectriver classificationsen_UK
dc.subjectriver typologiesen_UK
dc.subjectchannel morphologyen_UK
dc.titleAn assessment of variants in the professional judgement of geomorphologically based channel typesen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreasonThe publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.-
dc.citation.jtitleRiver Research and Applications-
dc.type.statusPublisher version (final published refereed version)-
dc.contributor.affiliationUniversity of Worcester-
dc.contributor.affiliationBiological and Environmental Sciences-
dc.contributor.affiliationBiological and Environmental Sciences-
Appears in Collections:Biological and Environmental Sciences Journal Articles

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