| Cite this article: | 刘祖汀,王丽萍,屈忠义,等.引黄春灌对盐碱土区地下水动态及理化性质的影响[J].灌溉排水学报,0,():-. |
| Liu Zuting,Wang Liping,Qu Zhongyi,et al.引黄春灌对盐碱土区地下水动态及理化性质的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effect of spring irrigation from Yellow River on groundwater dynamics and physicochemical properties in saline alkali soil |
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Liu Zuting,Wang Liping,Qu Zhongyi,et al
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1.Inner Mongolia Agricultural University;2.Agriculture and animal husbandry extension center of Wuyuan County,Bayannaoer City,Inner Mongolia
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| Abstract: |
| 【Objective】In order to explore the influence of spring irrigation from the Yellow River on the regional shallow groundwater dynamics and physicochemical properties,【Method】 By monitoring the groundwater level, eight ions, EC, pH, soil conductivity and other indicators before and after spring irrigation in saline alkali soil of the experimental area, using the methods of mathematical statistics and hydrogeochemical analysis, the groundwater dynamics before and after spring irrigation and the changes of groundwater environment after spring irrigation were analyzed【Result】The results showed that: 1.after spring irrigation, the mass concentrations of TDS, Ca2+ , K+ + Na+ , SO42- and Cl- in the experimental area were increased, in which the average mass concentrations of K+ + Na+ + and Cl- were the highest, which were the dominant ions in the cation and anion, the coefficient of variation of Cl-, K+ + Na+ is also the largest, which has high spatial variability,is a sensitive factor changing with environmental factors, and is also the main variable determining the salinization of groundwater;2. the main factors affecting the composition of groundwater are not only rock weathering and evaporation crystallization, but also cation exchange; 3.The main chemical types of groundwater change from Na-Mg-Cl-SO4-HCO3 and Na-Cl-SO4-HCO3 to Na-Cl-SO4;4.Because of the difference of irrigation water quantity and the hysteresis and permeability of groundwater, it takes 10-20 days for the groundwater to rise from spring irrigation to the shallowest depth in the experimental area, and the difference between the groundwater depth and the shallowest depth before irrigation is 1.197m-2.142m, and the daily average range of groundwater rise is 0.0798m/d-0.169.【Conclusion】 The average TDS content of groundwater increased by 15.6% after spring irrigation, which indicated that spring irrigation had a significant effect on soil salt leaching in the experimental area, but the groundwater depth remained high from June to August. Therefore, the amount of spring irrigation should be reduced and the drainage should be strengthened in the experimental area, so as to prevent soil secondary salinization and salt stress, and improve the effect of drainage and salt drainage in the experimental area. |
| Key words: saline-alkali soil;Water diversion from the Yellow River for spring irrigation; groundwater salinity; groundwater depth |
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