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  • On large-scale flow structures in a gravel-bed river
  • Canadian geomorphology 2000
  • Canada ; Carrying capacity ; Experimentation ; Gravel ; Quebec ; River bed ; Runoff ; Stream ; Stream flow ; Turbulence
  • This paper confirms the presence of large-scale flow structures in gravel bed rivers, pictures their sequence and patterns and characterises their mean and individual properties. The analysis relies on a new technique for displaying velocity
  • 2000
  • Annual bed-elevation regime in the alluvial channel of Squamish River, southwestern British Columbia, Canada
  • British Columbia ; Canada ; Carrying capacity ; Discharge ; Regression analysis ; River bed ; River regime ; Seasonal variation ; Stream
  • The aim of this study is to examine the annual regime of channel scour and fill by monitoring bed-elevation changes in a reach of Squamish River in southwestern British Columbia. The survey results show that bedload movement occurs as waves
  • or pulses forming bedwaves that appear to maintain an overall coherence with movement downstream. Although a weak seasonal effect is evident in this study, the bed-elevation regime is dominated by sediment supply-driven fluctuations in bedload transport
  • 2000
  • Wood storage within the active zone of a large European gravel-bed river
  • Wood storage within the active zone of the dynamic, gravel-bed, Fiume Tagliamento, Italy, was investigated at 8 sites along the river's main stem. The objective was to study variations in the distribution and abundance of wood at a sample of sites
  • , in order to identify downstream trends and to understand how the controls on wood storage change along the length of the river.
  • 2000
  • Continuous monitoring of bedload flux in a mountain gravel-bed river
  • An automatic bedload monitoring station has been established on the perennial Tordera River, a Mediterranean mountain gravel-bed stream located in NE Spain. The AA. present data on channel-average bedload flux for this river and on the response
  • 2000
  • The development of an automated correction procedure for digital photogrammetry for the study of wide, shallow, gravel-bed rivers
  • This paper develops an automated correction procedure for dealing with point errors associated with through-water photogrammetry, for application in the study of clear-water, shallow gravel-bed rivers. The procedure involves combining digital
  • photogrammetry and image analysis techniques to : correct for the effects of refraction at an air-water interface; and eliminate and reinterpolate points where the bed has not been seen. The correction procedure was applied to raw digital elevation models (DEMs
  • ) generated using digital photogrammetry from 1:3000 scale aerial photography of a small reach of the North Ashburton River, New Zealand.
  • 2000
  • Modelling bedload yield in braided gravel bed rivers
  • This paper outlines an approach for estimating the annual bedload yield of a braided channel. This procedure is based on the extension of the theory of flow and sediment transport in braided rivers recently presented by Paola (1996). The potential
  • for using such an approach to quantify the relationship between bedload yield and stream morphology is investigated herein with reference to the Waimakariri River, New Zealand.
  • 2000
  • Late Holocene channel and floodplain development in a wandering gravel-bed river : the River South Tyne at Lambley, northern England
  • Geomorphological analyses of the morphology, lithostratigraphy and chronology of Holocene alluvial fills in a 2.75 km long piedmont reach of the wandering gravel-bed River South Tyne, in Northumberland, have identified spatial and temporal patterns
  • 2000
  • Bed-material transport estimated from channel morphodynamics : Chilliwack River, British Columbia
  • This study investigates the relation between channel changes, as mapped from aerial photography, and bed-material transport along Chilliwack River. Detailed mapping of channel features was completed for 5 dates between 1952 and 1991 using
  • volumes of bed material. In the absence of large floods, transport rates decline and vegetation begins to establish new floodplain.
  • 2000
  • Incorporation of bed texture into a channel evolution model
  • Channel geometry ; Fluvial dynamics ; Grain size distribution ; Meander ; Mississippi ; Model ; River bed ; Sedimentology ; United States of America
  • Channel evolution models (CEM) have been developed to qualitatively describe the morphological adjustments of channels undergoing incision. Herein, bed material grain size is incorporated into an existing CEM to describe the sequence of grain size
  • changes. The analysis is based on the data from bed material that were available from a 1986 sampling program in northwestern Mississippi. Samples were taken along 3 sand-and-gravel-bed channels at 300-m intervals. To provide a comparable data set
  • 2000
  • Morphology of riffle-pool sequence in the River Severn, England
  • Channel geometry ; England ; Fluvial hydrology ; Gravel ; Longitudinal section ; Methodology ; River bed ; Shropshire ; Statistics ; Stream ; Turbulence ; United Kingdom
  • Despite the occurence of riffle-pool sequences in many rivers there are few data concerning riffle-pool unit morphology. In this paper, field data from the River Severn in England are analysed using 3 robust objective methods : the zero-crossing
  • 2000
  • Holocene development of the River Lippe valley, Germany : a case study of anthropogenic influence
  • Channel geometry ; Fluvial terrace ; Germany ; Holocene ; Human impact ; Hydraulic works ; Meander ; Model ; North Rhine Westfalia ; Palaeohydrology ; River bed ; Stream
  • This article describes the Inselterrasse and Aue in detail and explains the Holocene development of the Lippe valley floor morphology, which is atypical for a central European river. It is shown that morphological evolution of the Lippe valley floor
  • 2000
  • Large wood retention in river channels : the case of the Fiume Tagliamento, Italy
  • Braided channel ; Channel geometry ; Friuli-Venezia Giulia ; Gravel ; Italy ; Riparian vegetation ; River bed ; Stream ; Wood
  • After more than 300 years of wide spread and intensive river management, few examples of complex, unmanaged river systems remain within Europe. An exception is the Fiume Tagliamento, Italy, which retains a riparian woodland margin and unconfined
  • river channel system. Field observations of large wood storage illustrate that wood retention at 8 sites along the river reflects the presence and abundance of the features incorporated in the classification of geomorphological style, including
  • 2000
  • A river runs through it : morphological and landowner sensitivities along the Upper Missouri River, Montana, USA
  • Bank erosion ; Dam ; Flood ; Hydraulic works ; Impact ; Missouri ; Montana ; Perception ; River regime ; Stream ; Suspended load ; Sustainable development ; United States of America
  • Landowners along the Missouri River in Montana believe that the operation of Fort Peck Dam has initiated bank erosion, thus threatening agricultural development within the region. Geomorphological evaluation indicates that bed degradation and bank
  • erosion have declined since construction of the dam, and the channel is now approaching dynamic equilibrium; public sensitivity to the proposed change is greater than the morphological sensitivity of the river. Sustainable management of the Missouri is now
  • 2000
  • Profile form and channel gradient variation within an upland drainage basin - River Noe, Derbyshire
  • The analysis focuses on profile form and channel slope along the River Noe and its 6 largest tributaries. The basin is underlain by 3 main lithologies, sandstone, shale and limestone. Channel bed slope is steep in upstream reaches and the streams
  • respond rapidly to rainfall events of even moderate magnitude. Consequently bed material transport occurs relatively frequently. Sediment transport is thus an active process, especially but not exclusively in the upper reaches. However, given
  • 2000
  • Monitoring and modelling morphological change in a braided gravel-bed river using high resolution GPS-based survey
  • This paper presents an alternative approach to the study of three-dimensional morphological dynamics of a divided reach of the gravelly River Feshie, Scotland, in which topographic survey of both exposed and submerged areas of the reach
  • 2000
  • Channel geometry ; Idaho ; Longitudinal section ; Mountain ; River bed ; Slope gradient ; Statistics ; Stream ; Topography ; United States of America
  • channel architecture (pool-riffle, plane bed, step-pool and cascades) and to develop relationships which could be used in predicting step-pool geometry and in understanding formative mechanisms.
  • 2000
  • Character of channel planform change and meander development : Luangwa River, Zambia
  • Air photo interpretation and field survey were used to examine rates and patterns of planform change over the last 40 years on an 80 km reach of the Luangwa River, Zambia. The river is a medium sinuosity sand-bed river and cutoffs on meandering
  • 2000
  • On river cross-sectional change in the Niger Delta
  • Changes in river cross-sections in the Niger Delta are instigated mainly by bank failures, fluctuations in discharge, and bed degradation by fluvial processes. The relative importance of factors causing river cross-sectional change was ranked, based
  • on a deterministic sensitivity technique involving partial differentiation of soil properties, flow characteristics, and geometrical parameters of the river channels. Sensitivity coefficients were used further to generate susceptibility indices, indicating
  • 2000
  • Last century valley floor modifications of the Trigno river (Southern Italy) : a preliminary report
  • for the last decades significant modifications of the channel pattern and a marked reduction of the floodplain width, accompained by a progressive valley floor terracing due to channel bed lowering. Analyses of possible controls on river behaviour, both natural
  • The recent evolution and present dynamics of the Trigno river was investigated by analysing morphological features and changes with time of the main channel system and the associated floodplain. The study allowed to point out in particular
  • and human-induced, allowed to advance some hypotheses about the relationship between the modifications of external conditions and river processes in the study area. - (NF)
  • 2000
  • Persistence of historic flood impact on a small sand-bed stream - Wellums Creek, New South Wales, Australia
  • This study demonstrates that historic flood-induced channel changes have not only occurred on major trunk rivers but in small tributary catchments as well. Another major focus is to address the relevance of not only external controls
  • appreciate the geomorphic change experienced in sand-bed streams of coastal New South Wales.
  • 2000