| 磁化微咸水一维水平吸渗特征与水分运动参数分析 |
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| 引用本文： | 单鱼洋,李晓菊,王全九,马晨光,张继红,韦开.磁化微咸水一维水平吸渗特征与水分运动参数分析[J].农业机械学报,2021,52(2):266-274. |
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| 作者姓名： | 单鱼洋 李晓菊 王全九 马晨光 张继红 韦开 |
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| 作者单位： | 西安理工大学;西安理工大学；中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室 |
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| 基金项目： | 国家自然科学基金重点项目（41830754）、国家自然科学基金-山东联合基金项目（U1706211）、国家自然科学基金面上项目（51679190）、国家重点研发计划项目（2016YFC0501405-04）和新疆维吾尔自治区重大科技专项（2016A03008） |
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| 摘 要： | 为探明磁化微咸水的水分运动规律,通过室内一维水平土柱吸渗试验,研究了不同矿化度(0.14、2、3、4、6 g/L)磁化微咸水的水平吸渗特征及其对土壤水分运动参数的影响。结果表明:不同矿化度的磁化微咸水最终累积入渗量与湿润锋深度均显著降低,湿润体平均含水率比未磁化微咸水增加了2.03%~6.11%,磁化微咸水入渗能够增强土壤持水能力,有利于改善土壤水分分布。相对于未磁化微咸水,磁化微咸水PHILIP入渗模型吸渗率S降低了7.71%~12.11%;磁化与未磁化微咸水的饱和导水率K s、相对饱和导水率ΔK s均与入渗水矿化度呈现较好的二次多项式关系。微咸水经过磁化处理后,BROOKS COREY模型形状系数n相对减小,而进气吸力h d相对增大;土壤非饱和导水率及其增长速率均降低,而相同土壤水吸力能够吸持的土壤含水率增加;土壤水分饱和扩散率D s与起始扩散的土壤含水率均有所增加。研究表明,磁化微咸水入渗过程中的土壤水分运动参数发生了改变,其作用效果与微咸水矿化度密切相关。
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| 关 键 词： | 磁化微咸水 矿化度 水平吸渗 水分运动参数 |
| 收稿时间： | 2020/5/25 0:00:00 |
Analysis of One-dimensional Horizontal Absorption Characteristics and Water Movement Parameters of Magnetized Brackish Water |
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| SHAN Yuyang,LI Xiaoju,WANG Quanjiu,MA Chenguang,ZHANG Jihong,WEI Kai.Analysis of One-dimensional Horizontal Absorption Characteristics and Water Movement Parameters of Magnetized Brackish Water[J].Transactions of the Chinese Society of Agricultural Machinery,2021,52(2):266-274. |
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| Authors: | SHAN Yuyang LI Xiaoju WANG Quanjiu MA Chenguang ZHANG Jihong WEI Kai |
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| Institution: | (State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,China) |
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| Abstract: | It is the basis for revealing the mechanism of the effect of magnetized brackish water on soil water movement parameters to predict the water movement of magnetized brackish water in field.A one-dimensional horizontal soil column experiment was carried out to study the horizontal absorption characteristics of magnetized brackish water with different salinities(0.14 g/L,2 g/L,3 g/L,4 g/L and 6 g/L)and its influence on soil water movement parameters.The results showed that the final cumulative infiltration and the depth of wetting front of magnetized brackish water were decreased significantly,while the average moisture content of the final wetted body was increased by 2.03%~6.11%.Magnetized brackish water infiltration could increase the soil water holding capacity,which was beneficial to improve the distribution of soil moisture.The absorption rate S in PHILIP infiltration model of magnetized brackish water was 7.71%~12.11%lower than that of unmagnetized brackish water,and the relationship between saturation conductivity K s and relative saturation conductivityΔK s of magnetized and unmagnetized brackish water and salinity of infiltration water was quadratic polynomial.After magnetization of brackish water,the shape coefficient n of BROOKS COREY model was decreased relatively,while the suction h d was increased relatively.The soil water content that can be absorbed by the same soil water suction was increased,while the unsaturated conductivity and its growth rate were decreased.The saturated diffusivity D s and the initial diffusivity soil water content were also increased.The results showed that the soil water movement parameters were changed in the process of magnetized brackish water infiltration,and its effect was closely related to the salinity of brackish water,which provided theoretical support and guidance for the rational use of magnetized brackish water irrigation. |
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| Keywords: | magnetized brackish water salinity horizontal absorption water movement parameters |
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