| Cite this article: | 杨泽龙,苗百岭,乌兰,等.河套灌区土壤盐碱化发生气象条件分析[J].灌溉排水学报,2020,(S1):-. |
| YANG Zelong,MIAO Bailing,WU lan,et al.河套灌区土壤盐碱化发生气象条件分析[J].灌溉排水学报,2020,(S1):-. |
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| Analysis of Meteorological Conditions of Soil Salinizational Process in Hetao irrigational area |
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YANG Zelong1, MIAO Bailing2, WU lan2, GONG Hong3, ZHENG Xiaoyan1, WANG Yunbin1, ZHAO Jianjun1
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1.Dalate Banner Meteorological Bureau in Inner Mongolia,Dalate Banner;2.Inner Mongolia Meteorological Institute;3.Inner Mongolia Meteorological Institute,Hohhot
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| Abstract: |
| In order to explore the meteorological prediction method of soil salinization in Hetao irrigational area, we used daily data (from 2017 to 2018) of 0-50cm soil moisture and data of meteorological observation at National Meteorological Observatory of Dalate Banner in Inner Mongolia, and analyzed meteorological conditions and its effects on vertical migration of water and salt in 0-50cm soil with methods of ANOVA and correlation analysis, and with the principle of “salt shifting with water”. The results show that the positive correlation between ground temperature and soil water content in 0-50cm soil layers is extremely significant, and it is the key driving factor for vertical evapotranspiration of soil water. In the summer and autumn, more than one week of continuous concentrated precipitation of 40mm or more than it is the main factor for infiltration of soil water and salt. The salt in soil layer of 30-40 cm or above it will be transferred to the soil layer of 40-50 cm with a duration of about 20 days. |
| Key words: Soil salinization; Meteorological dynamics; Evapotranspiration; Soil moisture; Hetao irrigational area |
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