Title: River Channel Typology: Feasibility for Use in River Management
Author: M Clark
Author: D Sear
Author: C Hill
Author: J Branson
Author: M Newson
Author: R Pawson
Author: S Juggins
Author: Environment Agency
Document Type: Monograph
Annotation: Environment Agency Project ID:EAPRJOUT_232, Representation ID: 33, Object ID: 1579
Abstract:
Substantial progress has been made towards a geomorphological classification of semi-natural rivers from the dimension variables. The classification is useful in its own right as a statistically-justified delineation of rivers on the basis of substrate type and it has the potential further to classify channels as sub-groups of substrate types on the basis of geomorphological features. A classification based on substrate type makes it relatively easy to conceptualise for the casual user. It also demonstrates that the TWINSPAN technique has applications for deriving classes from this type of mixed data - subject always to constraints imposed by the quality and appropriateness of the datasets themselves. Overall, progress in the refinement of an operational river channel typology appears likely to be best achieved by focusing on: - Enhanced data, particularly the prospect of using RI-IS 1995 data collected on the improved geomorphological specification. - Enhanced information handling, perhaps by exploiting,the advantages of replication by maintaining the TWINSPAN analysis of 1995 data (and possibly combined 1994/1995 data), but supplementing this with other visualisation or analytical techniques. In addition, a core, refinement would be a focus on the introduction of simple (probably rule-based) indicators of channel stability.
Publisher: Environment Agency
Subject Keywords: Rivers; Channels (geography); Fluvial landforms; Classification systems; Geomorphology; Freshwater ecology
Extent: 128
Permalink: http://www.environmentdata.org/archive/ealit:4395
Total file downloads: 296
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