Journal of the Japanese Society of Snow and Ice
Online ISSN : 1883-6267
Print ISSN : 0373-1006
Search
Advanced search
OR
Browse
Search
Volume 60, Issue 6
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Comparison of a powder snow avalanche model with thermal experiments on inclined boundaries
    Yusuke FUKUSHIMA, Tatsuji HAGIHARA, Mitsuo SAKAMOTO
    1998 Volume 60 Issue 6 Pages 453-462
    Published: November 15, 1998
    Released on J-STAGE: August 07, 2009
    DOIhttps://doi.org/10.5331/seppyo.60.453
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this paper, the adequacy of numerical model of powder snow avalanches is examined by experiments of inclined thermals with deopisiting solid particles. The numerical model consists of mass conservation equations for the air and snow particles and the momentum equation which is called the three-equation model. In the numerical model, the entrainment coefficient is expressed by a linear function of the slope angle of the bottom. This model is examined by the experimental data of thermals on inlcined boundaries using the mixture of water and solid particles. The model and the experiments gave good results such as the longitudinal variations of the height, the speed, and the volume of solid particles in the thermal.
    View full abstract
    Download PDF (3250K)
  • Japanese automatic weather observation in Antarctica (1992-1997)
    Shuhei TAKAHASH, Hiroyuki ENOMOTO, Takao KAMEDA, Hideaki MOTOYAMA, Ter ...
    1998 Volume 60 Issue 6 Pages 463-472
    Published: November 15, 1998
    Released on J-STAGE: August 07, 2009
    DOIhttps://doi.org/10.5331/seppyo.60.463
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The automatic weather station (AWS) units were installed at six sites on the ice sheet from Soya Coast to Dome Fuji (3810m a.s.l.) in the Antarctic. Data-logging AWS using CMOS (Complementary metal oxide semiconductor) memory and ARGOS-AWS were used in this program. Low temperature tests of the data logger and other instruments were carried out. It was confirmed that the data logger with the CMOS memory worked well down to about-80°C. Wind generators and solar batteries were tested on the traverse route in the Antarctic; wind generator worked well above-55°C, and the solar battery worked without any troubles. The data obtained by this system are useful for meteorological and glaciological investigations between the coastal region and Dome Fuji.
    View full abstract
    Download PDF (4034K)
  • Snow pressures on the leg structures of power transmission towers
    Eijiro HONGO
    1998 Volume 60 Issue 6 Pages 473-490
    Published: November 15, 1998
    Released on J-STAGE: August 07, 2009
    DOIhttps://doi.org/10.5331/seppyo.60.473
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The leg structures of power transmission towers in snowy districts are subjectd to snow pressures such as the pressure of sloping snow cover and the pressure of snow subsidence. These snow pressures were measured to assist the design of rational leg structures. Measured data were analysed statistically together with the calculation of the pressure of sloping snow cover after the Haefeli's formula and the snow subsidence pressure after the Nakamata's formula. The results were applied to the design of 1000 kV power transmission towers which completed in 1993, reducing about 40 % in the pressure of sloping snow cover on the leg structures.
    View full abstract
    Download PDF (12895K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top