Hydraulics of Ice Covered Rivers and Ice Jam Analysis PDF Download
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Author:
Publisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Ice on rivers, lakes, etc
Languages : en
Pages : 118
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Book Description
This report presents experimental results on the conditions of initiation of an ice jam by a simple surface obstruction, on the equilibrium thickness of an ice jam formed by accumulation and submergence of ice floes, and on the compression strength of floating, fragmented ice cover. In the study on ice jam initiation, it was found that the minimum concentration of floes in the opening of the obstruction at which a jam occurs is nearly independent of the ratio of width of constricted passage to channel width, and is proportional to a negative power of the ratio of floe length to width of constricted passage. From energy analysis of floe submergence, a relationship relating the thickness of a jam formed by accumulation and submergence of floes to the approach flow characteristics was derived and found to fit satisfactorily the experimental data. In experiments on compression strength of floating, fragmented ice cover it was found that the compressive strength is inversely proportional to compression velocity and independent of cover length.
Author: D. D. Andres
Publisher:
ISBN:
Category : Congresses and conventions
Languages : en
Pages : 352
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Book Description
Author: Mehmet Secil Uzuner
Publisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages : 158
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Book Description
An analytical model is developed for evolution of embacles in rivers. The differential equations underlying the analysis are the static force equilibrium relation for the fragmented ice cover; the unsteady, nonuniform momentum relation for the liquid flow beneath the ice; and the unsteady continuity equations for the solid and liquid phases. The analysis is limited to the case of uniform, rectangular channels. It yields predictions for the streamwise distribution of the thickness of the ice cover and the depth of flow beneath it; the flow depth and cover thickness over the uniform downstream reach where the jam thickness and flow depth are constant; the flow depth at the upstream end of the jam; and the velocity of propagation of the jam front. Estimates are also obtained for the rate of growth of a jam during early stages of its evolution, just following initiation.
Author: S. Beltaos
Publisher: Water Resources Publication
ISBN: 9780918334879
Category : Nature
Languages : en
Pages : 402
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Book Description
Author: Andrew M. Tuthill
Publisher:
ISBN:
Category : Ice on rivers, lakes, etc
Languages : en
Pages : 36
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Book Description
This report describes flow-control methods for reducing ice problems in rivers. Objectives include reducing ice interference with winter hydroelectric production and navigation, ice jam flood mitigation, as well as ensuring minimum winter flows for fish and water supply. The winter season is divided into three periods. During early winter, the main objective of flow control is to promote the rapid formation of a smooth, stable ice cover. For the midwinter period, the aim of the river regulation is to maintain an intact ice cover and avoid premature ice breakup. During the final winter period, the goal is to minimize adverse effects of ice breakup. Examples illustrate the methods and objectives, emphasizing innovative approaches. Available flow regulation planning tools are described and valuable research directions identified.
Author: Qizhong Guo
Publisher:
ISBN:
Category : Floods
Languages : en
Pages : 350
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Book Description
Author: G. Tsang
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 326
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Book Description
Workshop held in Burlington, Ontario, September 23-24, 1980. Sponsored by National Water Research Institute of Environment Canada and the National Research Council's Working Group on Hydraulics of ice covered rivers. Additonal resistance to flow caused by the presence of ice in a stream formed the theme of this workshop. Sessions included complete and partial ice cover, ice jams, frazil ice and hanging dams, and modelling.
Author: A. M. Wasantha Lal
Publisher:
ISBN:
Category : Hydraulic models
Languages : en
Pages : 92
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Book Description
Author: Karl-Erich Lindenschmidt
Publisher: Springer Nature
ISBN: 3030286797
Category : Technology & Engineering
Languages : en
Pages : 267
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Book Description
This book exposes practitioners and students to the theory and application of river and lake ice processes to gain a better understanding of these processes for modelling and forecasting. It focuses on the following processes of the surface water ice: freeze-up, ice cover thickening, ice cover breakup and ice jamming. The reader will receive a fundamental understanding of the physical processes of each component and how they are applied in monitoring and modelling ice covers during the winter season and forecasting ice floods. Exercises accompany each component to reinforce the theoretical principles learned. These exercises will also expose the reader to different tools to process data, such a space-borne remote sensing imagery for ice cover classification. A thread supporting numerical modelling of river ice and lake ice processes runs through the book.
