[A-CG04_1PM2] Hydroclimate in Asian monsoon region

[ACG04-10] モンスーンアジアにおける衛星雨量プロダクトGSMaPの性能調査

*上米良 秀行¹、鍋坂 誠志¹、Fadli Syamsudin²、Thanh Ngo-Duc³、Le Viet Xe⁴、Hernando Hilton T.⁵、松本 淳⁶、牛尾 知雄⁷、岩見 洋一¹ (1.土木研究所 水災害・リスクマネジメント国際センター、2.インドネシア技術評価応用庁、3.ベトナム国家大学ハノイ校、4.ベトナム水文気象局、5.フィリピン大気地球物理天文局、6.首都大学東京・海洋研究開発機構、7.大阪大学)

キーワード：アジアモンスーン, 降水, 衛星

Satellite rainfall products provide the spatial and temporal distribution of rainfall estimates over the ungauged regions where no ground-based measurements with rain gauges and/or meteorological radars are available. For the regions, the satellite products have special importance in, for example, hydrological and agricultural applications such as flood forecasting/warning and water resources management. The Global Satellite Mapping of Precipitation (GSMaP) products have high resolution in space and time (0.1 deg. and 1 h); besides the near-real-time version of GSMaP opens to the public within four hours after measurements. They are thus highly expected to be in operational use in many countries and regions. There are the problems in accuracy and precision of the products due to the limitations on measuring principles, time intervals of sampling and others. However, the above-mentioned strengths of the products are considerable. Therefore, the performance of the GSMaP products needs to be investigated in various areas for the appropriate and effective use; moreover, through the investigation, it can be expected that the knowledge useful for improving the performance will be obtained. The present study investigates the performance of two GSMaP products, GSMaP_MVK and GSMaP_Gauge (a gauge-adjusted GSMaP_MVK), in the four river basins located from the tropics to mid-latitudes in the Asian monsoon region, including: the Solo Basin (16,100 km²) in Jawa, Indonesia; the Thu Bon–Vu Gia Basin (10,350 km²) in central Vietnam; the Pampanga Basin (9,759 km²) in Luzon, the Philippines; and the Tone Basin (16,840 km²), Japan. The study is ongoing and intermediate results mainly for the Solo and Thu Bon–Vu Gia river basins are discussed at this session.