| 沟灌二维入渗影响因素实验研究 |
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| 引用本文： | 张新燕,蔡焕杰,王健.沟灌二维入渗影响因素实验研究[J].农业工程学报,2005,21(9):38-41. |
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| 作者姓名： | 张新燕 蔡焕杰 王健 |
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| 作者单位： | 西北农林科技大学水利与建筑工程学院,杨凌,712100 |
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| 基金项目： | 国家高技术研究发展计划(863计划)(2002AA2Z4031) |
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| 摘 要： | 为进一步探明沟灌灌水沟的水分入渗规律，该文研究了沟灌中的灌水沟中水深、沟底宽、沟底导水率及土壤初始含水率等因素对沟灌二维入渗的影响，研究结果表明：减小灌水沟中水深和沟底导水率及增大土壤初始含水率都有利于灌水沟的水平侧向入渗，同时可相应减小垂向入渗；而灌水沟底宽不影响沟的侧向入渗，只影响垂向入渗，底宽减小时，垂向入渗减小。沟底导水率影响最大，计划灌水定额为45 mm，沟底导水率为0时垂向入渗深度较沟底裸露透水时减小41％，明显改善了沟灌入渗体的形状。研究结果可为改进沟灌灌水技术提供参考。
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| 关 键 词： | 沟灌 二维入渗 灌水技术 影响因素 |
| 文章编号： | 1002-6819(2005)09-0038-04 |
| 收稿时间： | 2004-10-30 |
| 修稿时间： | 2005-03-10 |
Experimental study on influence factors of two-dimensional infiltration in furrow irrigation |
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| Zhang Xinyan,Cai Huanjie and Wang Jian.Experimental study on influence factors of two-dimensional infiltration in furrow irrigation[J].Transactions of the Chinese Society of Agricultural Engineering,2005,21(9):38-41. |
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| Authors: | Zhang Xinyan Cai Huanjie and Wang Jian |
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| Abstract: | In order to understand the patterns of water infiltration in furrow irrigation, the experiment was conducted to study the effects of water depth, bottom width, bottom hydraulic conductivity of furrow irrigation and initial soil moisture content on two-dimensional infiltration in furrow irrigation. The results revealed that reducing the water depth and bottom hydraulic conductibility of furrow irrigation, and increasing initial soil moisture content were beneficial to increasing horizontally lateral infiltration and concurrently reducing vertical infiltration but their bottom width only affected lateral infiltration other than vertical infiltration; when the width decreased, the vertical infiltration decreased. Of these influence factors, the bottom hydraulic conductivity showed the strongest influence on infiltration. When the irrigation quota was 45 mm, the depth of the vertical water infiltration decreased by 41% at the conductivity of zero compared with that in bare ground irrigation thereby remarkably changing the shape of infiltration body in furrow irrigation. |
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| Keywords: | furrow irrigation two-dimensional infiltration irrigation technique influence factors |
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