李淑芹,王全九.垂直线源入渗土壤水分分布特性模拟[J].农业机械学报,2011,42(3):51-57.
Li Shuqin,Li Shuqin.Simulation of Soil Water Distribution under Vertical Line Source Infiltration[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(3):51-57.
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垂直线源入渗土壤水分分布特性模拟   [下载全文]
Simulation of Soil Water Distribution under Vertical Line Source Infiltration   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  垂直线源入渗  数值模拟  Hydrus-2D
基金项目:国家科技支撑计划资助项目(2007BAD38B03)和新疆自治区重大专项(200731136-5)
作者单位
李淑芹 西安理工大学 
王全九 西安理工大学 
中文摘要:基于非饱和土壤水动力学理论,利用Hydrus-2D软件分析了垂直线源入渗条件下的土壤水分分布特征。通过试验对比验证,反推出试验土壤的水力参数。结果表明,Hydrus-2D软件可用于垂直线源入渗土壤水分分布特征的模拟,且精度较好。对不同灌水技术要素条件下的垂直线源入渗土壤水分分布特征进行模拟研究,结果表明,垂直线源入渗条件下,不同质地土壤的湿润体形状差别不大,大小有明显的差别:砂壤土和粘壤土的水平湿润半径分别是砂土的0.59和0.24,垂直湿润深度分别是砂土的0.42和0.31;在不同线源埋深情况下,土壤湿润体的形状和大小差别不大,湿润体的位置有显著的差别,当埋深增加5cm,砂土、砂壤土、粘壤土的垂直湿润深度分别增加6%、11.5%、16%;线源长度和直径对土壤水分分布影响较大,其中线源长度主要影响垂直湿润深度,线源直径主要影响水平湿润半径;初始含水率高时,相同断面处的含水率增大;在相同入渗时段内,湿润锋水平运移距离和垂直运移距离随土壤初始含水率的增大而增大。
Li Shuqin  Li Shuqin
Xi’an University of Technology;Xi’an University of Technology
Key Words:Vertical line source infiltration, Numerical simulation, Hydrus-2D
Abstract:Based on the theory of unsaturated soil water dynamics, the soil water distribution under vertical line source infiltration was analyzed by the software Hydrus-2D. The model was testified by the experiments and soil hydraulic parameters were estimated. The result showed that this model could be used to simulate soil water infiltration characteristics with certain accuracy. The characteristics of water distribution under line source irrigation were simulated concerning different irrigation technique factors. The results showed that, under the condition of line source irrigation, the shape of wetting patterns under different soil textures was similar, and the scale was different: the ratio between the maximum sand loam and clay loam’s level wetting radius and sand’s were 0.59 and 0.24, the ratios of vertical humid depth were 0.42 and 0.31; on the condition of different line source depth, the shape and scale of wetting patterns were similar, and the positions had great difference, when the depth increased 5cm, the vertical humid depths of sand, sandy loam and clay loam were increasing by 6%, 11.5%, 16% separately; the length and the diameter of the line source had conspicuous influence on soil water distribution, the length had a major impact on the vertical humid depth, the diameter had a primary influence on horizontal wetting radius; when the initial water Symbol`content was high, the water content in the same cross-section increased; in the same period of irrigation time, the wetting front distance of level and vertical increased with the increasing of initial water content. 

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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