| 负压灌溉对湿润体特征参数的影响 |
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| 引用本文： | 肖娟,郭秀峰,高晓丽,葛平磊.负压灌溉对湿润体特征参数的影响[J].灌溉排水学报,2013,32(2). |
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| 作者姓名： | 肖娟 郭秀峰 高晓丽 葛平磊 |
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| 作者单位： | 太原理工大学水利科学与工程学院,太原,030024 |
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| 基金项目： | 山西省科技攻关项目，山西省高校科技开发项目 |
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| 摘 要： | 基于室内试验,分析了不同负压(-2、-1.5、-1.0、-0.5、0m)灌溉对湿润体特征参数的影响。结果表明,负压灌溉湿润体为椭球体,湿润体的宽深比随入渗时间和供水水头的增加而增加;湿润体的水平和垂直运移速度随时间的增加和供水水头的减小而减小;单个灌水器所控制的湿润土体体积Vc和湿润体的体积V具有良好的线性关系;在灌溉过程中湿润体的平均含水率无显著变化。
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| 关 键 词： | 负压灌溉 供水水头 累积入渗量 平均含水率 |
Effect of Negative Pressure Irrigation on Characteristic Parameters of Wetted Soil Volume |
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| Abstract: | The effects of 5 pressure heads(-2,-1.5,-1.0,-0.5,0 m)on characteristic parameters of wetted soil mass were studied based on the experiments indoor.The results indicated that the geometry of the wetted soil under negative pressure irrigation was best represented by a truncated ellipsoid,and the maximal horizontal distance occurred below the soil surface;the width-to-depth ratio of wetted soil mass increased with the increase of time and pressure head;The horizontal and vertical migration rates decreased with the increase of time and the decrease of pressure head;There was a good linear relation between the soil volume controlled by an emitter and the wetted volume;Average volumetric water content in the wetted zone hardly changed during the whole irrigation process. |
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| Keywords: | negative pressure irrigation pressure head of the water supply accumulated infiltration average volumetric water content |
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