人工衛星データを使用した地域蒸発散量の推定

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タイトル別名
  • Estimation of Regional Evapotranspiration by Using Satellite Derived Data.
  • ジンコウ エイセイ データ オ シヨウ シタ チイキジョウハッサンリョウ ノ スイテイ

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抄録

A new method for estimation of regional evapotranspiration using satellite derived data is proposed. This method estimates daily regional evapotranspiration by combining high resolution LANDSAT-TM data, NOAA-AVHRR data of which the estimation accuracy of surface temperature is high, and wide-area representative radiosonde data.<br>As a case study, we caluculated the epavotranspiration for 2 districts in the Hokkaido Ishikari Plain using this method. Results are reasonable.<br>Though there is no direct method for verification, comparison with the Prisetley-Taylor method shows that the results correctly reflect the effects of land use. This result shows that this method is sensitive to land use and that it is a useful method for estimation of the regional evapotranspiration. The representativeness of the radiosonde data is questionable in the comparison between results from 2 regions.<br>Though there are some details to be improved, this could be a valuable method by which the regional evapotranspiration can be estimated using easily obtainable data.

収録刊行物

  • 農業気象

    農業気象 56 (4), 261-273, 2000

    日本農業気象学会

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