Author: Samuel C. ColbeckPublisher:
ISBN:
Category : Snow
Languages : en
Pages : 32
Book Description
The Compression of Wet Snow
Author: Samuel C. ColbeckPublisher:
ISBN:
Category : Snow
Languages : en
Pages : 32
Book Description
The Compression of Wet Snow
Author: Samuel C. ColbeckPublisher:
ISBN:
Category : Compacting
Languages : en
Pages : 17
Book Description
The compressibility of wet snow is described in terms of pressure melting and nonlinear viscous deformation at grain contacts. The results of experiments with different salinities and liquid water contents are compared with computed densities. The decreasing compressibility of wet snow with increasing salinity and decreasing liquid content is quantified and explained. Simultaneous particle growth and the doubly charged layer at phase boundaries are included in the model. The results show that the density of wet snow increases approximately as a power of time but is highly dependent on the stress, initial particle size, liquid water content, and ionic impurity content of the snow. (Author).
Thermodynamic Deformation of Wet Snow
Author: Samuel C. ColbeckPublisher:
ISBN:
Category : Rheology
Languages : en
Pages : 20
Book Description
Measurements of the Dielectric Properties of Wet Snow Using a Microwave Technique
Author: Bruce D. SweenyPublisher:
ISBN:
Category : Dielectric measurements
Languages : en
Pages : 44
Book Description
An accurate method of measuring liquid water in snow covers is required to determine the properties of wet snow. The dielectric properties of wet snow must be utilized to adequately measure its liquid water content. In this study the effect of liquid water on the complex dielectric constant of natural snow is determined in the microwave frequency range. Deloor's method for calculating the dielectric constant for mixtures and the results of waveguide experiments on samples of wet snow and glass beads are used to construct a calibration curve relating the measured dielectric loss factor directly to the water content of wet snow. The results are independent of porosity, past history and chemical impurities. A relation between the effective dielectric constant and the porosity and water content is proposed and tested experimentally. The general nature of this relation is described and suggestions are made for the development of a more precise relation. It is concluded that the dielectric constant is a function of porosity and water content only.
Theory of Metamorphism of Wet Snow
Author: Samuel C. ColbeckPublisher:
ISBN:
Category : Avalanches
Languages : en
Pages : 24
Book Description
Grain growth, bond growth and densification of wet snow are described in terms of the distribution of equilibrium temperature in the snow matrix. At high water saturations the equilibrium temperature increases with grain size; hence, small particles melt away as large particles grow. Melting also occurs at the integrain bonds, causing a low strength and rapid densification. At low saturations the equilibrium temperature is determined by the capillary pressure and the particle sizes have only a second order effect. Therefore, grain growth proceeds slowly and, even at large over-burden pressures, no intergrain melting occurs. At low saturations the water 'tension' acts through a finite area, thus large attractive forces exist between the grains, and the strength of the snow matrix is large. (Author).
Technical Report
Author: Cold Regions Research and Engineering Laboratory (U.S.)Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 610
Book Description
The Physics and Mechanics of Snow as a Material
Author: Henri BaderDynamics of Snow and Ice Masses
Author: Samuel C. ColbeckPublisher: Elsevier
ISBN: 0323148891
Category : Science
Languages : en
Pages : 479
Book Description
Dynamics of Snow and Ice Masses gives an outline of snow and ice studies with an emphasis on essential properties and processes. The monograph also treats the dynamical aspects of snow and ice masses. The text covers topics such as the flow and temperature of ice sheets and shelves, the numerical modeling of ice-sheet changes; the structure of glaciers, the experimental creep behavior of ice, flow law of glacier ice, and advance and retreat of glaciers. Also covered are topics such as sea ice - the physics of its growth, drift, and decay; iceberg deterioration, sources, drift, and drift patterns; and freshwater ice growth, motion, and decay. The book is recommended as a textbook for graduate-level students of snow and ice studies and as reference for climatologists.
Principles of Snow Hydrology
Author: David R. DeWallePublisher: Cambridge University Press
ISBN: 1139471600
Category : Science
Languages : en
Pages : 482
Book Description
Principles of Snow Hydrology describes the factors that control the accumulation, melting and runoff of water from seasonal snowpacks over the surface of the earth. The book addresses not only the basic principles governing snow in the hydrologic cycle, but also the latest applications of remote sensing, and techniques for modeling streamflow from snowmelt across large mixed land-use river basins. Individual chapters are devoted to climatology and distribution of snow, snowpack energy exchange, snow chemistry, ground-based measurements and remote sensing of snowpack characteristics, snowpack management, and modeling snowmelt runoff. Many chapters have review questions and problems with solutions available online. This book is a reference book for practicing water resources managers and a text for advanced hydrology and water resources courses which span fields such as engineering, earth sciences, meteorology, biogeochemistry, forestry and range management, and water resources planning.
CRREL Report
Author: Cold Regions Research and Engineering Laboratory (U.S.)Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 608
Book Description