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Under the same soil initial water content, pressure head and buried depth, the soil texture has a significant influence on the wetted soil characteristics. The results showed that: The transport distance of soil wetting front in 3 directions is vertical downward > horizontal direction > vertical upward, the influencing factors (soil texture, initial water content, pressure head and buried depth) have small impact on the shape of wetted pattern, and the contour of soil water content is approximately "concentric circle". In the case of different soil textures (sandy loam soil, loam soil and silty loam soil) and the same soil texture (loam soil) with different initial moisture contents (0.085, 0.106, 0.130 cm3/cm3), pressure water heads (0.6, 1.2, 1.8 m) and buried depths (20, 30, 40 cm), the dynamic change of wetted soil characteristics was simulated by HYDRUS-2D software. The results supported the use of HYDRUS-2D as a tool for investigating and designing moistube irrigation management practices. The HYDRUS-2D predictions of the cumulative infiltration, wetting front distance and water content distribution were found to be in very good agreement with the data. We compared HYDRUS-2D simulations of horizontal moistube irrigation with experimental data. Publisher:Chinese Society of Agricultural EngineeringĪbstract:In order to investigate the influence mechanism of soil texture, initial water content, pressure head and buried depth on soil wetting characteristics of horizontal moistube irrigation, a mathematical model of soil water movement under horizontal moistube irrigation was established based on HYDRUS-2D model, and the relationship between the specific flow rate and pressure head was determined. Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringĪbbreviated source title:Nongye Gongcheng Xuebao
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Title:HYDRUS-2D simulation of soil wetting pattern with horizontal moistube-irrigation and analysis of its influencing factorsĪuthors:Fan, Yanwei (1, 2) Zhao, Tong (1) Bai, Guilin (1) Liu, Wenguang (3)Īuthor affiliation:(1) College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China (2) Key Laboratory of Mechanics on Disaster and Environment in Western China, The Ministry of Education of China, Lanzhou University, Lanzhou 730000, China (3) College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, China