Show simple item record

dc.contributor.authorMarteau, Baptiste
dc.contributor.authorGibbins, Chris N.
dc.contributor.authorVericat Querol, Damià
dc.contributor.authorBatalla, Ramon J.
dc.description.abstractThis paper is the first of a pair that report the findings of a river rehabilitation project centred on the reconnection of a formerly diverted headwater tributary (Ben Gill) to its main‐stem river (the River Ehen). The present paper describes the geomorphic evolution of the tributary in the 2 years following its reconnection, with a particular focus on assessing the volumes of sediment now being supplied to the main‐stem Ehen. Structure‐from‐Motion photogrammetry was used to produce Digital Elevation Models (DEMs) of the newly connected tributary, with successive DEMs compared to assess topographic changes in the channel and quantify volumes of material exported. 3D errors in the DEMs were small relative to the scour and fill observed in the channel (error 0.016–0.056 m compared to up to 1.7 m vertical change between consecutive surveys). Erosion was the dominant process in the tributary channel, though this varied spatially and temporally. Over the 2‐year period, an estimated minimum of 384 m3 of coarse sediment was exported from Ben Gill and delivered to the confluence zone, where a new bar feature developed as a result. This estimate is twice as high as earlier ones. Analysis of the growth of this bar suggested that much of the material supplied by Ben Gill remains here temporarily, with onward conveyance constrained by the competence of the regulated main‐stem. The work shows that, thanks to the reconnection, this small (0.55 km2) ephemeral tributary (flowing for only around 20% of the time) has become a key source of sediment for the main‐stem Ehen. The second in the pair of papers focuses on the geomorphic responses of the main‐stem to this renewed supply of sediment.ca_ES
dc.description.sponsorshipThis study was funded as part of a PhD grant by the Environment Agency UK and United Utilities. DV was funded by a Ramon y Cajal fellowship (RYC‐2010‐06264) at the time the project was developed, and is now employed as a Serra Húnter Fellow at the University of Lleida. Authors acknowledge the support from the Economy and Knowledge department of the Catalan Government through the Consolidated Research Group “Fluvial Dynamics Research Group”‐RIUS (2017‐SGR‐459), and the additional support provided by the CERCA Programme, also from the Catalan Government.ca_ES
dc.publisherJohn Wiley & Sons Ltdca_ES
dc.relation.isformatofReproducció del document publicat a:
dc.relation.ispartofRiver Research and Applications, 2020, vol. 36, núm. 8, p. 1488-1503ca_ES
dc.rightscc-by-nc-nd, (c) Marteau, Baptiste et al., 2020ca_ES
dc.subjectCatchment scaleca_ES
dc.subjectRiver Ehenca_ES
dc.subjectRiver rehabilitationca_ES
dc.subjectSediment transportca_ES
dc.subjectSfM photogrammetryca_ES
dc.titleGeomorphological response to system‐scale river rehabilitation I: Sediment supply from a reconnected tributaryca_ES

Files in this item


This item appears in the following Collection(s)

Show simple item record

cc-by-nc-nd, (c) Marteau, Baptiste et al., 2020
Except where otherwise noted, this item's license is described as cc-by-nc-nd, (c) Marteau, Baptiste et al., 2020