Author: William W. Sayre
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 96
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Book Description
Ice covers cause a number of changes in alluvial channel flows by approximately doubling the wetted perimeter and thereby producing a redistribution of the boundary and internal shear stresses. A series of flume experiments was conducted to investigate the effects of simulated ice covers on various characteristics of alluvial channel flows. In comparison to free-surface flows with the same unit discharge and energy slope, flows with simulated ice covers were found to have substantially larger depths and lower average velocities. Due mainly to the lower velocities sediment discharges were found to be sharply reduced. Flow in an ice-covered channel is divided by a plane of zero shear stress into a lower and an upper layer. To the extent that the shear stress and velocity distributions in the lower layer are the same as in a free surface flow with the same mean velocity, and depth equal to the thickness of the lower layer, relationships developed for flows in alluvial channels with a free surface can be used for predicting several features of flows in ice-covered alluvial channels. (Author).
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Frazil ice
Languages : en
Pages : 52
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Book Description
This initial study of the ice-covered Tanana River, near Fairbanks, Alaska, attempted to 1) establish field methods for systematic and repetitive quantitative analyses of an ice-covered river's regime, 2) evaluate the instruments and equipment for sampling, and 3) obtain the initial data of a long-term study of ice cover effects on the morphology, hydraulics and sediment transport of a braided river. A methodology was established, and detailed measurements and samplings, including profiling by geophysical techniques, were conducted along cross sections of the river. A small, portable rotary drill rig equipped with a 356-mm (14-in.) ice auger was used to cut large diameter holes in the ice cover for through-the-ice measurements. Portable heat sources and a heated shelter were required to continuously thaw and dry equipment for the repetitive measurements. Measurements included ice cover thickness, water level, water depth, temperature, flow velocity, suspended load and bed load, frazil ice distribution and bed material composition. Remotely gathered data included apparent resistivity and subsurface radar profiling. The various techniques, sampling gear and problems encountered during use in the subfreezing cold are described in detail in this report.
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 600
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 522
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1048
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Book Description
Author: S. Beltaos
Publisher:
ISBN: 9781887201506
Category : Frazil ice
Languages : en
Pages : 0
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Book Description
The breakup of a river ice cover can be both fascinating and perilous, owing to ever-changing ice conditions and dynamic processes that sometimes lead to extreme flood events caused by ice jams. Though much progress has been made recently in the study of ice jams, less has been achieved on the more general, and more complex, problem of how to predict the entire breakup process, from the first ice movement to the last ice effect on river stage. This type of knowledge is essential to determining when and where ice jam threats may develop and when they may release and generate steep flood waves that can trigger ice runs and jamming further downstream. In turn, such understanding is invaluable to natural hazard reduction, ecosystem conservation and protection, and adaptation to climatic impacts. This book combines the existing information, previously scattered in various journals, conference proceedings, and technical reports. It contains contributions by several authors to achieve a comprehensive and balanced coverage, including qualitative and quantitative descriptions of relevant physical processes, forecasting methods and flood-frequency assessments, as well as ecological impacts and climatic considerations. The book should be of interest to readers of different backgrounds, both beginners and specialists. -- Publisher's website.
Author: D. D. Andres
Publisher:
ISBN:
Category : Congresses and conventions
Languages : en
Pages : 352
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Book Description
Author: Brennan Thomas Smith
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 186
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Book Description
Author: Lawrence K. Wang
Publisher: Springer
ISBN: 3319229249
Category : Technology & Engineering
Languages : en
Pages : 578
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Book Description
This volume provides in-depth coverage of such topics as multi-reservoir system operation theory and practice, management of aquifer systems connected to streams using semi-analytical models, one-dimensional model of water quality and aquatic ecosystem-ecotoxicology in river systems, environmental and health impacts of hydraulic fracturing and shale gas, bioaugmentation for water resources protection, wastewater renovation by flotation for water pollution control, determination of receiving water’s reaeration coefficient in the presence of salinity for water quality management, sensitivity analysis for stream water quality management, river ice process, and computer-aided mathematical modeling of water properties. This critical volume will serve as a valuable reference work for advanced undergraduate and graduate students, designers of water resources systems, and scientists and researchers. The goals of the Handbook of Environmental Engineering series are: (1) to cover entire environmental fields, including air and noise pollution control, solid waste processing and resource recovery, physicochemical treatment processes, biological treatment processes, biotechnology, biosolids management, flotation technology, membrane technology, desalination technology, water resources, natural control processes, radioactive waste disposal, hazardous waste management, and thermal pollution control; and (2) to employ a multimedia approach to environmental conservation and protection since air, water, soil and energy are all interrelated.
Author: Jiaxing Zhang
Publisher: CRC Press
ISBN: 1138026743
Category : Computers
Languages : en
Pages : 2590
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Book Description
This proceedings volume contains selected papers presented at the 2014 International Conference on Informatics, Networking and Intelligent Computing, held in Shenzhen, China. Contributions cover the latest developments and advances in the field of Informatics, Networking and Intelligent Computing.
