GPS可降水量を用いた大雨予測指標の検討

森 牧人, 田中 宏延, 平松 和昭, 原田 昌佳

doi:10.11408/jsidre2007.2007.363

書誌事項

タイトル別名

Examination of an Index for Predicting Heavy Precipitation using GPS-derived Precipitable Water Vapor

説明

Recent studies have estimated the total amount of water vapor in an air column using GPS-derived precipitable water vapor (GPS-PWV). We used GPS and meteorological data obtained at a plain, in northern Kyushu, Japan, to investigate relations between GPS-PWV and precipitation on days with daily precipitation of 50 mm or more. The following characteristics were associated with days of heavy precipitation:(1) the rate of increase in GPSPWV (R_inc= (PWV₀-PWV_*)/PWV₀, where PWV₀ is the value of GPS-PWV at 00 JST, and PWV_* is the value 24 hr before) ranged from -0.25 to 0.75;(2) PWV₀ was larger than PWV_sat, which was derived as a function of T₀ (air temperature at 00 JST); and (3) PWV₀≥PWV_ref and T₀≥T_ref were simultaneously satisfied where PWV_ref and T_ref were climatological threshold values. We constracted a heavy precipitation index, I_HP based on the above characteristics. The acceptable prediction results provided by I_HP suggests its usefulness for analyzing and forecasting heavy precipitation events.

収録刊行物

農業農村工学会論文集

農業農村工学会論文集 2007 (250), 363-371,a1, 2007

公益社団法人農業農村工学会

詳細情報詳細情報について

CRID: 1390001205285453312

NII論文ID: 130004119066

DOI: 10.11408/jsidre2007.2007.363

ISSN: 18847242; 18822789

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JaLC
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