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Title: 熱帯低密度観測流域での実時間洪水推定に関する研究
Other Titles: A Study on Real-time Flood Estimation in Tropical Poorly-gauged Basins
Authors: 中西, 健一郎  KAKEN_name
田中, 賢治  kyouindb  KAKEN_id
小森, 大輔  KAKEN_name
沖, 大幹  KAKEN_name
小尻, 利治  KAKEN_name
Author's alias: NAKANISHI, Kenichiro
KOMORI, Daisuke
OKI, Taikan
KOJIRI, Toshiharu
Keywords: 低密度観測流域
poorly-gauged basins
flood management
installation guideline of rain gauges
topographic features
Issue Date: 1-Jun-2009
Publisher: 京都大学防災研究所
Journal title: 京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B
Volume: 52
Issue: B
Start page: 795
End page: 806
Abstract: 本稿では気象・水文観測網の密度が十分でない,いわゆる低密度観測流域における洪水対策として,およそ500km2縲・000km2規模の流域を対象とし,レーダーによる降水の詳細な空間分布観測値を用いて,標高と重心からの距離の2変数によって効果的な観測点を特定できる指標を算定し実流域で検証した. 加えて衛星による全球降水マップの有効性について議論した.全球降水マップは過小評価傾向や見逃しがあるが,一定の地上観測があれば洪水対策に対して有効であると判明した.
This study aims to develop a new installation guideline of rain-gauge networks for the flood management in poorly gauged basins, whose area is about 500 ~ 1000 km2. So in this study a guideline was estimated with de-tailed precipitation distribution data from OmKoi radar data, and was validated with gauged data in MaeWang basin. In addition The GSMaP (Global Satellite Mapping of Precipitation) product is expected to detect flood events in un-gauged basins, but generally underestimate the amount of precipitation. So Bias in GSMaP was corrected with in-situ precipitation, and then GSMaP had a potential for flood detection.
Appears in Collections:No.52 B

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