| Project/Area Number |
26350485
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Natural disaster / Disaster prevention science
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Research Collaborator |
ISHIMARU Taminoe
YAMAZAKI Masaki
MARUYAMA Toshisuke
NAKAI Sento
ISHIZAKA Masaaki
MOTOYOSHI Hiroki
YAMASHITA Katsuya
HIRASAWA Naohiko
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | snowfall observation / snowfall amount / hydrometeor measuement / discrimination / hydrometeor measurement |
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| Outline of Final Research Achievements |
Optical reflectivity-based precipitation gauges were made, which had benefits of less maintenance and convenience. These benefits would lead to be able to place at a lot of ground stations to observe heavy snowfall which frequently occurred in small areas. Our newly developed gauges were based on the reflectivity of near infrared source of light to solve problems of measuring situation using statistics and back-end procedures though other optical gauges for sale were based on measuring the transmitted light to result in more frequent maintenance and large size. We carried out the field observation in Nagaoka and could discriminate between the snowflakes and graupels. Simultaneously we could estimate the precipitation rate in the condition having a correlation coefficient of about 0.6.
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