Volume 5 Issue 2
Jun.  2012
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Article Navigation >  Water Science and Engineering  > 2012  >  5(2): 137-144
Jin-liang REN, Qiong-fang LI, Mei-xiu YU, Hao-yang LI. 2012: Variation trends of meteorological variables and their impacts on potential evaporation in Hailar region. Water Science and Engineering, 5(2): 137-144. doi: 10.3882/j.issn.1674-2370.2012.02.002
Citation: Jin-liang REN, Qiong-fang LI, Mei-xiu YU, Hao-yang LI. 2012: Variation trends of meteorological variables and their impacts on potential evaporation in Hailar region. Water Science and Engineering, 5(2): 137-144. doi: 10.3882/j.issn.1674-2370.2012.02.002
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Variation trends of meteorological variables and their impacts on potential evaporation in Hailar region

doi: 10.3882/j.issn.1674-2370.2012.02.002
  • 1.

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

  • 2.

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

Funds:  the Special Fund for Public Welfare Industry of Ministry of Water Resources of China (Grant No. 200901045), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT0717), and the 111 Project (Grant No. B08048).
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  • Corresponding author: Qiong-fang LI
  • Received Date: 2011-05-02
  • Rev Recd Date: 2011-10-14
    Abstract
  • Evaporation, which is an important factor in the water balance at the basin scale, is a critical variable in the determination of local available water resources. Since the potential evaporation is mainly influenced by meteorological variables, it is necessary to investigate the extent to which different meteorological variables affect the potential evaporation. The aim of this study was to explore the variation trends of different meteorological variables, and their impacts on the potential evaporation. This study selected the Hailar Meteorological Station of the Hailar region, which is situated in a cold, semi-arid, and sub-humid region, as a case study site. Based on observed daily meteorological data from 1951 to 2009, the potential evaporation was calculated with the Penman formula, and the variations of meteorological variables were investigated with the nonparametric Mann-Kendall test. The correlation between the potential evaporation and each meteorological variable at annual and seasonal scales was also analyzed. The results show that the annual and seasonal potential evaporation and air temperature present increasing trends, whereas the wind speed, sunshine duration, and relative humidity present decreasing trends. Among the meteorological variables, the air temperature and relative humidity are the key factors that affect potential evaporation at different time scales, and the impacts of other meteorological variables on the potential evaporation are not significant and vary with time scales.

     

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