2008
DOI: 10.1016/j.geomorph.2007.10.022
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A predictive typology for characterising hydromorphology

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Cited by 82 publications
(59 citation statements)
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References 41 publications
(43 reference statements)
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“…The use of RHS data is constrained by survey design, which was based on the need for a time-limited and cost-effective method to describe the physical character of rivers in the UK. Consequently, the major advantage of being able to analyse a large inventory dataset with the statistical confidence needed for surveillance purposes is countered by a limited ability to discriminate features needed for specialist ecological purposes or to provide all the diagnostic clues needed for detailed fluvial morphological interpretation (Orr et al, 2008;Sear et al, 2008). The interpretation of RHS results depends on a good understanding of the fluvial morphological processes operating at various scales (Newson et al, 1998) and also the ecological consequences of river management activities (Raven et al, 1998c).…”
Section: River Habitat Surveymentioning
confidence: 99%
“…The use of RHS data is constrained by survey design, which was based on the need for a time-limited and cost-effective method to describe the physical character of rivers in the UK. Consequently, the major advantage of being able to analyse a large inventory dataset with the statistical confidence needed for surveillance purposes is countered by a limited ability to discriminate features needed for specialist ecological purposes or to provide all the diagnostic clues needed for detailed fluvial morphological interpretation (Orr et al, 2008;Sear et al, 2008). The interpretation of RHS results depends on a good understanding of the fluvial morphological processes operating at various scales (Newson et al, 1998) and also the ecological consequences of river management activities (Raven et al, 1998c).…”
Section: River Habitat Surveymentioning
confidence: 99%
“…The considerable literature, dating back more than five decades, dealing with the influence of scale (Harvey, 1967;Penning-Rowsell and Townshend, 1978;Carlisle et al, 1989;Levin, 1992), and stream channel characteristics (Leopold and Wolman, 1957;Strahler, 1964;Hynes, 1975;Frissell et al, 1986;Hawkins et al, 1993) is evidence of the importance of the physical habitat as a driver of ecological responses. During the last decade the increasing use of remotely-sensed datasets and Geographic Information Systems means that studies involving multiple spatial scales linked with land cover patterns have become widespread (see Orr et al, 2008;Buffagni et al, 2009;Kail et al, 2009;Sandin, 2009;Vaughan et al, 2009). The increasing knowledge of the interaction between various components of a river system is becoming crucial in the context of the European Union's (EU) Water Framework Directive (WFD: EC/2000/60) which requires, on the one hand, the identification of the "reference condition "of a river's status and on the other hand, the implementation of river quality assessment tools, both for abiotic and biotic components.…”
Section: Introductionmentioning
confidence: 99%
“…This and the need for an appropriate, operational match between the instruments, mechanisms and measures used to deliver protection of the catchment ecosystem are the themes of this paper. A similar 'operational match' would be an imperative in seeking an evidence base from the relevant sciences: hydrology, geomorphology and ecology but, however, insufficient convergence has occurred to create the appropriate tools (see also Orr et al, 2008;Vaughan et al, 2009).…”
mentioning
confidence: 99%
“…Until the links between hydrological, geomorphological and ecological processes are better understood we will continue to rely on untested assumptions about causal change between physical habitat diversity and biodiversity. A recent attempt by Orr et al (2008) to derive an empirical hydromorphology typology based on surrogates for processes controlling erosion and deposition illustrates this conundrum. A small number of channel types dominate the habitat for juvenile salmonids; in turn, salmonid fish stocks are the indicator of biodiversity or, rather, ecological 'health' (Norris and Thoms, 1999).…”
mentioning
confidence: 99%