Volume 3 Issue 4
Dec.  2010
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Article Navigation >  Water Science and Engineering  > 2010  >  3(4): 394-404
Tao WANG, Wei-min BAO, Hai-li XU, Zhen ZHU, Si-min QU, Peng SHI, Hai-ying HU, Rui-qi FAN, Qian LI. 2010: Experimental study on the relationship between average isotopic fractionation factor and evaporation rate. Water Science and Engineering, 3(4): 394-404. doi: 10.3882/j.issn.1674-2370.2010.04.003
Citation: Tao WANG, Wei-min BAO, Hai-li XU, Zhen ZHU, Si-min QU, Peng SHI, Hai-ying HU, Rui-qi FAN, Qian LI. 2010: Experimental study on the relationship between average isotopic fractionation factor and evaporation rate. Water Science and Engineering, 3(4): 394-404. doi: 10.3882/j.issn.1674-2370.2010.04.003
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Experimental study on the relationship between average isotopic fractionation factor and evaporation rate

doi: 10.3882/j.issn.1674-2370.2010.04.003
  • 1.

    HydroChina Chengdu Engineering Corporation, Chengdu 610072, P. R. China

  • 2.

    State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China

  • 3.

    School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, P. R. China

Funds:  Major Science and Technology Program for Water Pollution Control and Treatment in China
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  • Corresponding author: Tao WANG
  • Received Date: 2010-09-20
  • Rev Recd Date: 2010-10-29
    Abstract
  • Isotopic fractionation is the foundation of tracing water cycle using hydrogen and oxygen isotopes. Isotopic fractionation factors in evaporation from free water body are mainly affected by temperature and relative humidity, and greatly vary with these atmospheric factors in a day. Evaporation rate can properly reveal the effects of atmospheric factors. Therefore, there should be a certain function relationship existing in isotopic fractionation factors and evaporation rate. An average isotopic fractionation factor was defined to describe isotopic differences between vapor and liquid phases in evaporation with time interval of hours or days. The relationship of average isotopic fractionation factor and evaporation based on isotopic mass balance was investigated through an evaporation pan experiment with no inflow. The experimental results showed that the isotopic compositions of residual water became more enrichment with time; the average isotopic fractionation factor was affected by air temperature, relative humidity and other atmospheric factors, and had a good functional relation with evaporation rate. The values of average isotopic fractionation factor could be easily calculated with the known of evaporation rate, the initial volume of water in pan and isotopic compositions of residual water.

     

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    • References(15)
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