| Cite this article: | 陈环宇,刘小京,田宇,等.水面蒸发的盐度效应及其影响因子分析[J].灌溉排水学报,0,():-. |
| Chen Huanyu,Liu Xiaojing,Tian Yu,et al.水面蒸发的盐度效应及其影响因子分析[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Analysis of salinity effect on water evaporation and its main influencing factors |
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Chen Huanyu,Liu Xiaojing,Tian Yu,et al
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1.Jiangsu Coastal Area Institute of Agricultural Sciences;2.CAS Engineering Laboratory for Efficient Utilization of Saline Resources,Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences
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| Abstract: |
| 【Objective】To clarify the salinity effect on water evaporation (E) and its main influencing factors in coastal saline-alkali land, 【Method】water evaporation experiments were set up with salinity gradients of 1, 3, 5, 10, and 20 g·L-1 from May to October 2018. The evaporation of different saline water was obtained through a self-made 20 cm evaporation pan, and the degree of correlation between meteorological factors and the evaporation of different saline water was determined by gray relational analyses. On sunny and cloudy days, the top three meteorological factors and salinity (S) are selected for path analysis of water evaporation. 【Result】The results show that: (1) The increase of the salinity will enhance the water surface tension, and lead to a decrease in the water evaporation. The cumulative evaporation of 1 g·L-1 during the observation period is increased by 97.66 mm compared with 20 g·L-1. (2) Water evaporation present positively correlated with radiation intensity (R), wind speed (Ws), vapor pressure deficit (VPD), and air temperature (Ta), and negatively correlated with relative humidity (RH), atmospheric pressure (Pr) and Salinity (S). (3) Among them, R is the main influencing factor of saline water evaporation in coastal saline-alkali land, and Ws and VPD show indirect effects on saline water evaporation on sunny and cloudy days. 【Conclusion】In summary, the increase in salinity increases the water surface tension, resulting in a decrease in the evaporation of saline water. Compared with the salinity influence on water evaporation, the meteorological factors are more significant, of which radiation intensity is the main influence factor here. |
| Key words: saline water evaporation; salinity effect; meteorological factors; gray relational analyses; path analysis |
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