Gravel-bed Rivers V
M Paul Mosley (Editor).
Gravel-bed rivers are both fascinating and of great practical significance to water resources managers. This book reports the proceedings of the fifth Gravel-Bed Rivers Workshop, held in New Zealand in August-September 2000. The Workshop brought together over 100 international scientists and river managers, to present their current research and to debate many aspects of gravel-bed river behaviour and management. The 24 chapters are contributed by over forty specialists, with additional analysis provided by many more. Their topics covered almost every conceivable aspect of the science, ranging from the processes of sediment entrainment by turbulence through to the response of fish to variations in river flows.
Gravel-Bed Rivers V presents state-of-the-art technology and up-to-the-minute knowledge. The technological applications range from detailed measurements of eddy structures and turbulence at centimetre-scale, through to time-lapse video photography of the changing pattern of channels in a kilometre-wide braided river. Exciting developments in data capture, image analysis and computer modeling are enabling huge strides to be made in describing, understanding and predicting the form and behaviour of gravel-bed rivers. They have revealed, for example, the existence of dendritic networks of braid channels in large braided rivers, which places the processes of channel evolution in a quite different perspective.
The fifth Workshop made a particular effort to address management goals in gravel-bed rivers, such as maintaining healthy aquatic ecosystems or controlling aggradation. Ecological and fisheries scientists introduced recent research into the behaviour of aquatic ecosystems in gravel-bed rivers. They showed for example the crucial importance of disturbance by floods in determining the diversity and biomass of aquatic vegetation, invertebrates and fish, in association with entrainment and movement of bed material. A number of papers considered the philosophy and practice of river management in three continents. A field exercise in the Waiho River provided an opportunity for Workshop participants to consider how to manage channel instability and aggradation in one of New Zealand's major tourist venues.
The book provides an important source of information and ideas for scientists, engineers, and resource managers seeking to understand gravel-bed rivers better. It will be useful also for senior undergraduate and graduate students who are developing their own research directions, and seeking inspiration from the leaders in their field.[Back to the index]
The content is a balance between new research findings and developments of already published work.
There are several good overview chapters: for example, Paola on modelling stream braiding over a range of scales, Lane on measurements of gravel-bed river morpholopgy, and Willgoose on erosion processes, catchment elevations and landform evolution modelling.
These are complemented by more specific studies such as those on discrete particle modelling and active tracers (McEwan et al.) and the consequences of unsteady sediment transport (Hoey et al.).
There are several case studies including a strong New Zealand element.
Probably the real strength of the book, as with previous GBR volumes, lies in the discussion and reply sections which follow the main papers. Virtually all the papers contain some element of discussion. These often contain very new research and ideas for further work.
Much of the discussion tends to bring in examples of New Zealand rivers and thus makes good use of the conference location. The discussions also give a good feel for the vitality of the conference and the main issues discussed.
The editor is to be commended for ensuring that the volume emerged in the year following the conference. The previous volume (GBR IV) took four years to emerge. As research on gravel-bed rivers tends to advance rapidly, prompt communication of results is essential. Based on the evidence presented in the proceedings I would certainly like to have been at the conference, and I would have bought the book had I not received a review copy. Unlike earlier volumes in the series, it is reasonably priced.
Abridged from a review by Jeff Warburton, Department of Geography, University of Durham, in Earth Science Processes and Landforms Volume 28 (10): 1159, 2003. The full review for subscribers to ESPL can be found by clicking this link
Paola, C. Modelling stream braiding over a range of scales
Paola, C.; Foufoula-Georgiou, E. Statistical geometry and dynamics of braided rivers.
McArdell, B.B.; Faeh, R. A computational investigation of river braiding.
Ashmore, P. Braiding phenomena: Statics and kinetics.
Hoey, T. et al. The consequences of unsteady sediment transport in braided rivers.
Pittaluga, M.B. et al. The morphometrics of braiding rivers: Experimental and theoretical results on unit processes.
Wilcock, P.R. The flow, the bed, and the transport: Interaction in flume and field.
Nelson, J.M. et al. Turbulence and particle entrainment.
Laronne, J.B. et al. Mobility of patch sediment in gravel bed rivers: Patch character and its implications for bedload.
Lane, S.N. The measurement of gravel-bed river morphology.
McEwan, I.K. et al. Discrete particle modelling and active tracers: New techniques for studying sediment transport as a Lagrangian phenomenon.
Gray, J.R.; Schmidt, L.J. Sediment-data quality, availability, and emerging technologies: A discussion.
Roy, G.R.; Buffin-Belanger. Advances in the study of turbulent flow structures in gravel-bed rivers.
Power, M.E. Controls on food webs in gravel-bedded rivers: The importance of the gravel-bed habitat to trophic dynamics.
Biggs, B.F. et al. The importance of bed sediment stability to benthic ecosystems of streams.
Jowett, I.J. Effects of floods and droughts on fish in a New Zealand gravel-bed river.
Richards, K. Floods, channel dynamics, and riparian ecosystems.
Mosley, M.P.; Schumm, S. Gravel bed rivers - the view from the hills.
Willgoose, G. Erosion processes, catchment elevations and landform evolution modelling.
Davies, T.R.; McSaveney, M.J. Anthropogenic fanhead aggradation, Waiho River, Westland, New Zealand.
Day, T.J.; Hudson, H.R. River management: The recent New Zealand experience.
Newson, M. et al. The management of gravel-bed rivers in England and Wales: from geomorphological research to strategy and operations.
Church, M. River science and Fraser River: Who controls the river?
Rouse, H.L. et al. The Transit New Zealand Waiho Workshop.
Best, J. et al. Visualisation of coherent flow structures associated with particle clusters: temporal and spatial characterisation revealed using ultrasonic Doppler velocity profiling. Horton, J. et al. Morphological and textural characteristics of bedforms generated in a bimodal sand-gravel mixture. Kleinhans, M.G. The Relation between Bedform Type, Vertical Sorting in Bedforms and Bedload Transport During Subsequent Discharge Waves in Large Sand Gravel Bed Rivers with Fixed Banks. Madej, M.A. Changes In Channel Roughness Values Following Large Sediment Inputs. Martin, V. et al. Hydraulic Roughness and Stability of Self-formed Stable Gravel Beds: The Role of Grain Protrusion. Seydell, I. Effects of morphology and sediment transport on riverbed permeability. Smart, G. et al. Roughness and Flow Resistance. Wittenberg, L. Bed clusters in humid perennial and Mediterranean ephemeral gravel-bed streams. Blom, A. et al. Bed Stratification and Sediment transport in flume experiments with a trimodal sediment mixture. Bunte, K.I. Portable Bedload Traps With High Sampling Intensity for Representative Sampling of Gravel Transport in Wadable Mountain Streams. Cohen, H.; Laronne, J.B. Bedload transport in the ephemeral and braided gravel-bed Nahal Rahaf, Southern Judean Desert, Israel. Crowe, J.; Wilcock, P.R. The Effect of Sand Supply on Transport Rates in a Gravel Bed Channel. Gray, J.R. et al. The U.S. Geological Survey National Sediment Laboratory Quality-Assurance Program. Lisle, T.E. Relations Between Sediment Storage and Transport Capacity for Alluvial Reservoirs. Rennie, C.D.; Millar, R.G. Measurements of Gravel Bedload Transport Velocity using an Acoustic Doppler Profiler. McEwan, I.; Heald, J. Discrete Particle Model Animations. MikoŻ, M.; Spazzapan Escorza, M. Development of the Spy-Cobble - An Instrumented Satellite for Measuring Dynamics of Sediment Transport in Turbulent Flows. Milan, D. et al. Magnetic tracing of sand through a riffle-pool sequence. Milan, d. et al. Influence of flow magnitude and duration upon tracer movement through pool-riffle-bar topography. Nelson, J.M. et al. Turbulence and particle entrainment. Shvidchenko, A.B. Critical shear stress for incipient motion of streambeds. Toro Escobar, C.M.; Parker, G. Equal Mobility: The Remains of the Day. Ashmore, P. Animation of a sequence of DEMs of a braided river physical model. Braudrick, C.A. et al. The Interaction Between Large Woody Debris, Debris Flows, and Channel Morphology: A Flume Experiment. Buffington, J.M. Hydraulic Roughness and Shear-Stress Partitioning in Forest Pool-Riffle Channels. Hicks, D.M. et al The braided Waimakariri River: new views of form and process from high-density topographic surveys and time-lapse imagery. Rinaldi, M. et al. Monitoring and modelling of unsaturated flow and mechanisms of riverbank failure in gravel bed rivers. Schsberl, F. Bed formation in curved steep channels. Surian, N. Downstream Variation in Bed Material Size along a Braided River, Piave River, Italy. Thorne, C. et al. Fluvial Audit for Rapid Geomorphological Assessment of Alluvial Rivers: Case Study of the Manuherikia River, Central Otago. Westaway, R.M. et al. Large-scale remote survey of a braided, gravel riverbed using digital photogrammetry and image analysis. Gilvear, D. The role of flow regime and stream bed stability in predicting variation in vegetation species richness and standing crop within UK rivers. Kenworthy, S.T.; Wilcock, P.R. Sediment Entrainment and the Displacement of Aquatic Insect Larvae: Results from a Laboratory Study. Richards, K. River dynamics and the ecology of the riparian zone. Rice, S.P et al. The Impact of Punctuated Downstream Fining on Macroinvertebrate Communities in Gravel-Bed Rivers. Avery, E. et al. Gravel Bed River Riffle Restoration in New South Wales, Australia. Connell, R.J. North Ashburton River - Blands Reach - Aggradation. Downs, P.W.; Caruso, B.S. Three Streamscapes Project: fluvial geomorphology context for rehabilitation opportunities in the Water of Leith, Dunedin, New Zealand. Grant, G.E.; Hayes, S.K. Geomorphic response to peak flow increases due to forest harvest activities, Western Cascades, Oregon. Hudson, H.R. Ashburton River Floodplain Management: Resource Consent Investigations. Hudson, H.R. Morphological Impacts of River Gravel Extraction: New Zealand Examples. Janssen, A. Maaswerken - Grensmaas: The remake of a river. PiZgay, H.; Saulnier, D. Streamway concept applied to the management of the south east French gravel-bed rivers.[Back to the index]