土木学会論文集B1(水工学)
Online ISSN : 2185-467X
ISSN-L : 2185-467X
水工学論文集第58巻
INVESTIGATING VEGETATION-ATMOSPHERE WATER EXCHANGE BY USING HIGH FREQUENCY SPECTROSCOPY VAPOR ISOTOPE OBSERVATIONS
Zhongwang WEIAtsushi OKAZAKIHidetoshi MAEDAYusuke SATOHMasashi KIGUCHIKeigo NODAMasahiro KOIKEWonsik KIMZhongfang LIUKei YOSHIMURA
著者情報
ジャーナル フリー

2014 年 70 巻 4 号 p. I_181-I_186

詳細
抄録

In this study, we first time test the feasibility of partitioning evapotranspiration using high frequency in-situ measurements of water vapor isotopes in a paddy field, Mase, Japan. By combining isotope measurements with Keeling plot method and Craig-Gordon model, transpiration is found representing more than 90% of the total evapotranspiration flux at the daily scale. However, the errors in this method could not be neglected. The primary cause of these errors is demonstrated to be the underestimate of water evaporation estimated by Craig-Gordon model. The variation of measured water vapor d-excess is significantly affected by the dominant components of evapotranspiration on diurnal time scale, it is suggested that the vegetation play a significant role in land surface water exchange process.

著者関連情報
© 2014 Japan Society of Civil Engineers
前の記事 次の記事
feedback
Top