1994 Fiscal Year Final Research Report Summary
OCCURENCE MECHANISUM OF SLUSHFLOW AND ITS HAZARD CHARACTERISTICS
| Project/Area Number |
05452374
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Natural disaster science
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| Research Institution | NIIGATA UNIV. |
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Principal Investigator |
KOBAYASHI Shunichi NIIGATA UNIV., RES.INST.FOR HAZARDS., PROFESSOR, 積雪地域災害研究センター, 教授 (70001659)
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| Co-Investigator(Kenkyū-buntansha) |
MARUI Hideaki NIIGATA UNIV., RES.INST.FOR HAZARDS., ASOCIATE PROFESSOR, 積雪地域災害研究センター, 助教授 (10219545)
OKI Yasue NIIGATA UNIV., RES.INST.FOR HAZARDS., PROFESSOR, 積雪地域災害研究センター, 教授 (30223754)
AOKI Shigeru NIIGATA UNIV., RES.INST.FOR HAZARDS., PROFESSOR, 積雪地域災害研究センター, 教授 (80018621)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Slushflow / Slush avalanche / Snow dam / Snow-melt flood / Viscosity / Impact force / Coagulational structure / Non-Newtonian |
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| Research Abstract |
Slushflow and slush avalanche are rapid mass movements of water-saturated snow and occur every year no the eastern slope of Mt.Fuji in Japan, which causes deforostation near the timberline and natural disasters. In spite of recent warmer and less snow winter years, some slushflow disasters occurred not only at Mt.Fuji but also in some small rivers at Tohoku and Hokuriku districts. The most big slushflow disaster occurred in Japan was Ohzikari, Aomori Prefecture on March 22,1945. At that time eighty-eight people were killed and twenty houses crushed by the slushflow.
To study a characteristic of slushflow, the mesurements of mechanical properties, impact forces and viscosity of the slush were carried out. Out experiments have shown that slush behaves as "pseudo-plastic" of non-Newtonian fluid with coagulational structures.
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