| 垄作沟灌水分入渗模拟与灌水沟断面优化 |
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| 引用本文： | 张新民,张吉孝,单鱼洋.垄作沟灌水分入渗模拟与灌水沟断面优化[J].水土保持研究,2014,21(1):137-141. |
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| 作者姓名： | 张新民 张吉孝 单鱼洋 |
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| 作者单位： | 1. 甘肃省水土保持科学研究所, 兰州 730020;2. 甘肃农业大学 工学院, 兰州 730070 |
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| 摘 要： | 以石羊河流域民勤地区为例，采用典型土壤实测土壤水分运动参数，应用Hydrus软件模拟不同沟型、不同垄宽条件下沟灌土壤水分运动，并研究了湿润锋推进过程，建立了沟灌土壤水分二维入渗模型，分析了灌水均匀度。结果表明:沟形相同条件下，竖向湿润锋的推进距离与沟底宽及水深呈正相关关系；水平湿润锋的推进距离由沟中水位决定；沟灌累计入渗量由灌水沟湿周的大小决定，入渗初期符合幂函数形式，入渗后期符合线性形式；同种土壤在沟深与水深相同时，V型沟横向灌水均匀度高于梯形沟，且水位越高均匀度越高。
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| 关 键 词： | 沟灌 入渗模拟 断面优化 均匀度 |
Numerical Simulation of Infiltration and Cross-section Optimization under Furrow Irrigation |
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| ZHANG Xin-min,ZHANG Ji-xiao,SHAN Yu-yang.Numerical Simulation of Infiltration and Cross-section Optimization under Furrow Irrigation[J].Research of Soil and Water Conservation,2014,21(1):137-141. |
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| Authors: | ZHANG Xin-min ZHANG Ji-xiao SHAN Yu-yang |
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| Institution: | 1. Gansu Research Institute for Soil and Water Conservation, Lanzhou 730020, China;2. College of Engineering, Gansu Agricultural University, Lanzhou 730070, China |
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| Abstract: | The hydraulic parameters of the typical soil collected from Minqin in the Shiyang River valley were tested. Water movement was simulated by Hydrus software under different types of furrow and ridge width, respectively. Both wetting front and irrigation uniformity was studied, and the two-dimensional infiltration model was established. The results showed that the relationship between vertical wetting front and furrow bottom width follows a positive correlation under the same furrow type, as well as a positive relationship was found between the water depth and vertical wetting front; cumulative infiltration was determined by wetted perimeter in the furrow irrigation and was found to follow a power function and linear function at the beginning infiltration and later, respectively; both furrow depth and water depth were same, uniformity in V type was higher than in trapezoid type, the deeper water level was and the higher uniformity was for the identical soil. |
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| Keywords: | furrow irrigation simulation of infiltration cross-section optimization uniformity |
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