| 不同入渗水头条件下的Green-Ampt模型 |
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| 引用本文： | 郭向红,孙西欢,马娟娟,毕远杰.不同入渗水头条件下的Green-Ampt模型[J].农业工程学报,2010,26(3):64-68. |
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| 作者姓名： | 郭向红 孙西欢 马娟娟 毕远杰 |
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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： | 国家自然科学基金资助项目（50979065）；山西省科技攻关资助项目（2007031069）；山西省研究生创新项目（20081041）；山西省高等学校优秀青年学术带头人支持计划资助 |
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| 摘 要： | 在蓄水坑灌灌水时，蓄水坑内入渗水头的增加会改变入渗界面土壤结构性状，从而导致土壤水分入渗特性发生变化。为了能够模拟不同入渗水头作用下的入渗过程，该文在分析入渗水头对水分入渗影响的机制基础上，将入渗水头对入渗的影响归结为对概化饱和区导水率的影响，建立了能够模拟不同入渗水头对入渗影响的改进Green-Ampt模型。在室内进行了不同入渗水头入渗试验对改进后的Green-Ampt模型进行验证，结果表明不同入渗水头条件下不同时刻对应入渗率的Green-Ampt模型计算值和试验实测值吻合较好，改进的Green-Ampt模型可以有效地模拟不同入渗水头条件下的入渗过程。
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| 关 键 词： | 入渗，导水率，灌溉，Green-Ampt模型，蓄水坑灌 |
| 收稿时间： | 2008/5/17 0:00:00 |
| 修稿时间： | 2008/10/30 0:00:00 |
Green-Ampt model of different infiltration heads |
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| Guo Xianghong,Sun Xihuan,Ma Juanjuan,Bi Yuanjie.Green-Ampt model of different infiltration heads[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(3):64-68. |
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| Authors: | Guo Xianghong Sun Xihuan Ma Juanjuan Bi Yuanjie |
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| Institution: | College of Water Resources Science and Engineering/a>;Taiyuan University of Technology/a>;Taiyuan 030024/a>;China |
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| Abstract: | During irrigation process, the soil structure of infiltration interface is changed with infiltration head increasing in water storage pit, which results in changing of soil water infiltration characteristics. In order to simulate the infiltration process of different infiltration heads, the improved Green-Ampt model of different infiltration heads was established based on mechanism of soil infiltration in different infiltration heads.?Effect of infiltration head on infiltration was reflected by the generalized saturated hydraulic conductivity. A series of experiments were conducted to verify the improved Green-Ampt model of different infiltration heads. The computational infiltration rate derived from the improved Green-Ampt model was in accordance with the experimental results under different infiltration heads. They indicate that the improved Green-Ampt model can effectively simulates infiltration process of different infiltration heads |
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| Keywords: | infiltration hydraulic conductivity irrigation Green-Ampt model irrigation with water stored in pit |
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