| 引用本文: | 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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| 摘要: |
| 【目的】探究引黄春灌对区域浅层地下水动态及地下水理化性质的影响。【方法】通过监测试验区盐碱地春灌前后地下水水位、八大离子、EC、pH、土壤电导率等指标，运用数理统计和水文地球化学分析的方法，分析春灌前后地下水动态及春灌后地下水水环境变化。【结果】结果表明：春灌后，试验区地下水整体上TDS、Ca2+、K++Na+、SO42-、Cl-的质量浓度有所增大，其中，K++Na+、Cl-的平均质量浓度最高，是阴阳离子中的优势离子，且Cl-、K++Na+的变异系数也是最大，其具有较高的空间变异性，是随环境因素变化的敏感因子，也是决定地下水盐化的主要变量；影响地下水组分的主要因素除了岩石风化作用和蒸发结晶作用外，还有阳离子交换作用；地下水主要化学类型主要由Na-Mg-Cl-SO4-HCO3型和Na-Cl-SO4-HCO3型向Na-Cl-SO4型转变；由于灌溉水量不同，且地下水存在滞后性及渗透性，试验区内地下水从春灌开始到埋深上升至最浅埋深用时为10-20天，灌溉前地下水埋深与最浅埋深差值范围在1.197m-2.142m之间，地下水上升日均幅度为0.079 8~0.169 0 m/d；【结论】春灌后地下水TDS含量平均增加了15.6%，说明春灌对试验区的土壤盐分淋洗作用较为显著，但春灌使得地下水埋深在6—8月居高不下，因此试验区宜适当减小春灌水量、加大排水力度，以防止发生土壤次生盐碱化和盐分胁迫作用，并提高试验区排水排盐效果。 |
| 关键词: 盐碱土;引黄春灌;地下水盐分;地下水埋深 |
| DOI： |
| 分类号:S271 |
| 基金项目:(51769022,51869019) |
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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 |
