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Water Science and Engineering 2009, 2(2) 11-18  DOI:   10.3882/j.issn.1674-2370.2009.02.002   ISSN: 1674-2370 CN: 32-1785/TV

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water evaporationzz')" href="#">water evaporation
hydrogen and oxygen isotopes
fractionation mechanism
experimental study
Hai-ying HU
Wei-min BAO
Si-min QU
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Experimental study on stable isotopic fractionation of evaporating water under varying temperature

Hai-ying HU*1,2;Wei-min BAO2;Tao WANG2;Si-min QU2

1. School of Civil Engineering and Transportation, South China University of Technology,
Guangzhou 510641, P. R. China
2. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China


The variation of stable isotope ratios in natural waters provides valuable information that can be used to trace water movement. Evaporation plays a crucial role in determining the variation of stable isotopes. In this paper, several evaporation experiments were conducted in order to study the stable isotopic fractionation mechanism of water and analyze the influence of different temperatures on evaporation fractionation. Three group experiments of water evaporation under different temperatures and initial isotopic values were carried out. The results show that fractionation factors of hydrogen and oxygen may increase with temperature, and the average enrichment degree of hydrogen isotope D is 3.432 times that of oxygen isotope . The results also show that the isotopic composition of the initial water has little influence on water evaporation fractionation, which is mainly affected by the state variables in the evaporation process, such as temperature. This research provides experimental data for further understanding the evaporation fractionation mechanism.

Keywordswater evaporationzz')" href="#"> water evaporation   hydrogen and oxygen isotopes   fractionation mechanism   temperature   experimental study  
Received 2009-02-15 Revised 2009-05-13 Online:  
DOI: 10.3882/j.issn.1674-2370.2009.02.002
Corresponding Authors: Hai-ying HU
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