Download or read book Towards Understanding Sediment Transport and Deposition in a Heavily Sediment impacted Reservoir and on Its Upstream Alluvial Surface written by Jacob Aaron Krall and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The issues surrounding the management of sediments accumulating in reservoirs remain an ongoing challenge to scientists and practitioners. All reservoirs trap inflowing sediment to some degree, leading to a suite of problems including loss of water storage capacity, impairment of navigability, loss of downstream flood-control benefits, increased flooding upstream because of streambed aggradation in the deltaic region, and sediment entrainment in hydropower equipment. The loss of storage capacity, in addition to reducing performance for water supply, hydropower and recreation, increases the pressure to develop replacement storage, especially in the face of population growth and climate change. One aspect of reservoir sedimentation that has received relatively little attention in the literature is the effect of progressive reservoir filling over time on the processes influencing sediment deposition. For example, as reservoirs become more and more filled with sediment, an increasing amount of deposition can occur above the normal-pool elevation, as a consequence of shallow overbank flows during high flow periods spreading across the alluvial surface of the sediment deposit. Much of the literature on reservoir sedimentation focuses on deposition in a reservoir with substantial remaining capacity. The evolution of the processes as the reservoir fills is of interest as well, but little attention is paid to this in the existing literature, despite possible implications for ecological succession, reservoir management, and dam removal. This dissertation employs a combination of analysis of previously collected field measurements, new field measurements using synthetic turf sediment traps, and numerical modeling to study the magnitude and spatial distribution of sediment deposition in and around Searsville Lake. I show that the alluvial surface upstream of Searsville Lake is spatially complex, and while two simple analytical models (a one-dimensional advection model and a turbulent diffusion model) have significant predictive value in determining the amount of sediment deposition, small-scale effects also play a substantial role. Additionally, simulations based on the Searsville area show results qualitatively similar to the field data in terms of the spatial complexity of erosion and deposition, as well as the relationship between hydrograph volume and magnitude of alluvial surface deposition. Sensitivity analysis shows that changes in alluvial surface roughness discretization and channel bathymetry influence erosional and depositional patterns on the alluvial surface, with varying impacts on the overall magnitude. The ordering of hydrograph events has a significant effect on the locations on the alluvial surface which experience the largest bed level change, and a moderate effect on the overall amount of sediment deposited on the alluvial surface. Finally, simulations predict deposition will preferentially occur at topographic lows, suggesting that over long times, if preferential flowpaths sample the full alluvial surface area, a relatively flat sediment surface is likely to develop. This speculation is consistent with the observed behavior at Searsville. A full modeling study of the sediment processes around Searsville--or any similar environment--featuring a full calibration and verification of the model, would further add to the understanding of the behavior of this complex environment. Long-term simulations accounting for the full range of channel processes, including migration, would be of particular interest, allowing for testing of the theory that the long term behavior of the system will be to move towards a more uniform sediment surface.
Download or read book Reservoir Sedimentation written by G.W. Annandale and published by Elsevier. This book was released on 1987-01-01 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on reservoir sedimentation in recent years has been aimed mainly at water resources projects in developing countries. These countries, especially in Africa, often have to cope with long droughts, flash floods and severe erosion problems. Large reservoir capacities are required to capture water provided by flash floods so as to ensure the supply of water in periods of drought. The problem arising however is that these floods, due to their tremendous stream power, carry enormous volumes of sediment which, due to the size of reservoirs, are virtually deposited in toto in the reservoir basin, leading to fast deterioration of a costly investment. Accurate forecasting of reservoir behaviour is therefore of the utmost importance.This book fills a gap in current literature by providing in one volume comprehensive coverage of techniques required to practically investigate the effects sediment deposition in reservoirs has on the viability of water resources projects. Current techniques for practically estimating sediment yield from catchments, estimating the volume of sediment expected to deposit in reservoirs, predicting sediment distribution and calculating scour downstream of reservoirs are evaluated and presented. The liberal use of diagrams and graphs to explain the various techniques enhances understanding and makes practical application simple. A major feature of the book is the application of stream power theory to explain the process of reservoir sedimentation and to develop four new methods for predicting sediment distribution in reservoirs.The book is primarily directed at practising engineers involved in the planning and design of water resources projects and at post-graduate students interested in this field of study.
Download or read book Sediment and Contaminant Transport in Surface Waters written by Wilbert Lick and published by CRC Press. This book was released on 2008-09-18 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contaminated bottom sediments and their negative impacts on water quality are a major problem in surface waters throughout the United States as well as in many other parts of the world. Even after elimination of the primary contaminant sources, these bottom sediments will be a main source of contaminants for many years to come. In order to determin
Download or read book Sediment Transport in Aquatic Environments written by Andrew Manning and published by BoD – Books on Demand. This book was released on 2011-10-03 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment Transport in Aquatic Environments is a book which covers a wide range of topics. The effective management of many aquatic environments, requires a detailed understanding of sediment dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Numerical models are often the tool used for predicting the transport and fate of sediment movement in these situations, as they can estimate the various spatial and temporal fluxes. However, the physical sedimentary processes can vary quite considerably depending upon whether the local sediments are fully cohesive, non-cohesive, or a mixture of both types. For this reason for more than half a century, scientists, engineers, hydrologists and mathematicians have all been continuing to conduct research into the many aspects which influence sediment transport. These issues range from processes such as erosion and deposition to how sediment process observations can be applied in sediment transport modeling frameworks. This book reports the findings from recent research in applied sediment transport which has been conducted in a wide range of aquatic environments. The research was carried out by researchers who specialize in the transport of sediments and related issues. I highly recommend this textbook to both scientists and engineers who deal with sediment transport issues.
Download or read book Sediment Transport Technology written by Daryl B. Simons and published by Water Resources Publication. This book was released on 1992 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Sediment Transportation and Alluvial Stream Problems written by R. J. Garde and published by . This book was released on 1985 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised Second Edition features updated information on sediment transport through pipes and the principles of sediment transportation which form the basis for solving alluvial stream problems. Discusses such theoretical aspects as properties of sediments, incipient motion condition, flow regimes, resistance to flow, bed load transport, suspended load and total load transport. Also covers applied problems including sediment samplers and sampling, stable channels, alluvial streams and sediment control.
Download or read book Deposition and Simulation of Sediment Transport in the Lower Susquehanna River Reservoir System written by and published by . This book was released on 1995 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Transport written by Andrew Manning and published by BoD – Books on Demand. This book was released on 2013-03-13 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment Transport Processes and their Modelling Applications is a book which covers a wide range of topics. The effective management of many aquatic environments, requires a detailed understanding of sediment dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Numerical models are often the tool used for predicting the transport and fate of sediment movement in these situations, as they can estimate the various spatial and temporal fluxes. However, the physical sedimentary processes can vary quite considerably depending upon whether the local sediments are fully cohesive, non-cohesive, or a mixture of both types. For this reason for more than half a century, scientists, engineers, hydrologists and mathematicians have all been continuing to conduct research into the many aspects which influence sediment transport. These issues range from processes such as scour, erosion and deposition, to how sediment process observations can be applied in sediment transport modelling frameworks. This book reports the findings from recent research in applied sediment transport which has been conducted in a wide range of aquatic environments. The research was carried out by researchers who specialise in the transport of sediments and related issues.
Download or read book Sediment Transfer Through the Fluvial System written by Valentin Golosov and published by . This book was released on 2004 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sedimentation written by Arved J. Raudkivi and published by CRC Press. This book was released on 2020-08-26 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph provides the practising engineer with a concise overview of the methods of water diversion and exclusion or removal of sediment from the diverted water. The emphasis is on flow features and the associated conveyance of sediments.
Download or read book Sediment Transport in Gravel Bed Rivers written by C. R. Thorne and published by . This book was released on 1987-09-28 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes and quantifies the movement and storage of sediment in rivers with gravel-bed material, based upon scientific and engineering principles. Papers based on theory and experiment are interspersed with case studies. Until recently, gravel-bed rivers have been under-researched, when compared with sand-bed rivers. There is a heightened interest in these rivers now, due to pressure from water resources, forestry and recreational development in upland areas.
Download or read book Sediment Dynamics and Pollutant Mobility in Rivers written by Bernd Westrich and published by Springer Science & Business Media. This book was released on 2007-10-11 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first interdisciplinary book on the mobilization of nutrients and pollutants in the water phase due to hydrodynamic processes. Coverage includes the formation of aggregates in turbulent water; flocks and biofilms from organic reactions; and the formation of new surfaces for re-adsorption of dissolved pollutants. The book gathers papers resulting from an International Symposium on Sediment Dynamics and Pollutant Mobility in River Basins in Hamburg, Germany, March, 2006.
Download or read book Modeling and Practice of Erosion and Sediment Transport under Change written by Mohamed Meddi and published by MDPI. This book was released on 2019-09-17 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate and anthropogenic changes impact the conditions of erosion and sediment transport in rivers. Rainfall variability and, in many places, the increase of rainfall intensity have a direct impact on rainfall erosivity. Increasing changes in demography have led to the acceleration of land cover changes in natural areas, as well as in cultivated areas, and, sometimes, in degraded areas and desertified landscapes. These anthropogenized landscapes are more sensitive to erosion. On the other hand, the increase in the number of dams in watersheds traps a great portion of sediment fluxes, which do not reach the sea in the same amount, nor at the same quality, with consequences on coastal geomorphodynamics. This book is dedicated to studies on sediment fluxes from continental areas to coastal areas, as well as observation, modeling, and impact analysis at different scales from watershed slopes to the outputs of large river basins. This book is concentrated on a number of keywords: “erosion” and “sediment transport”, “model” and “practice”, and “change”. The keywords are briefly discussed with respect to the relevant literature. The contributions in this book address observations and models based on laboratory and field data, allowing researchers to make use of such resources in practice under changing conditions.
Download or read book Sediment Transport Turbidity Channel Configuration and Possible Effects of Impoundment of the Mad River Humboldt County California written by William M. Brown and published by . This book was released on 1975 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reservoir Sediment Management written by Sahnaz Tigrek and published by CRC Press. This book was released on 2011-09-15 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Siltation in reservoirs has become an important problem when dams are getting older and stop functioning when the sediment has accumulated to a certain extent. With proper sediment management techniques, negative effects of sediment can be avoided and reservoir life and performance can be improved. This volume deals with reservoir sedimentation, deposition and removal. It provides the principles of sediment transport and gives guidelines to predict reservoir life. It presents several removal techniques, accompanied with detailed operation descriptions. With the help of the RESCON open source software, cost analysis tools to determine the optimum method for maintenance and operation of a reservoir can be applied. To illustrate practice and to assist the reader in setting up a sediment management operation, a number of case studies of existing large dams are included. Written by two experts on reservoir operation, this volume is intended for professionals and advanced students working on dam and reservoir design, construction, operation, maintenance and rehabilitation.
Download or read book Sediment and the Environment written by International Association of Hydrological Sciences. Scientific Assembly and published by . This book was released on 1989 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Transport in Alluvial Channels written by Jan Wagner and published by . This book was released on 1983 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
