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| 涌泉根灌在黄土坡地的水分运移规律试验 | |
| 引用本文： | 汪有科,黎朋红,马理辉,赵颖娜,黎朋军.涌泉根灌在黄土坡地的水分运移规律试验[J].排灌机械,2010,28(5):449-454. |
| 作者姓名： | 汪有科 黎朋红 马理辉 赵颖娜 黎朋军 |
| 作者单位： | 1. 西北农林科技大学,水利与建筑工程学院,陕西,杨凌,712100;中国科学院、水利部,水土保持研究所,陕西,杨凌,712100 2. 西北农林科技大学,水利与建筑工程学院,陕西,杨凌,712100;重庆地质矿产研究院,重庆,400042 3. 西北农林科技大学,水利与建筑工程学院,陕西,杨凌,712100 4. 中国石油集团海洋工程有限公司,天津分公司,天津,300451 |
| 基金项目： | "十一五"国家科技支撑计划重大项目 |
| 摘 要： | 为了了解涌泉根灌这项微灌技术灌水后的水分运移情况,在野外黄土坡地利用剖面法对涌泉根灌在不同孔径、孔深条件下土壤水分运移规律进行了研究.结果表明,在不同孔径、孔深处理下,湿润体水平扩散半径、向上入渗距离和向下入渗深度有不同的影响,且均与时间有显著的幂函数关系;涌泉根灌停止后24 h内的土壤湿润体水平及竖直方向扩散相对变化超过了47%,湿润体平均含水量相对降低了30%;24 h后的扩散较小,平均含水量下降较小.涌泉根灌停止后24 h时的湿润体特征值可作为涌泉根灌系统设计的依据;推荐涌泉根灌适宜的孔洞深度为30~40 cm,孔径为φ6 cm.研究结果可为涌泉根灌技术的实际应用提供理论参考. |
| 关 键 词： | 涌泉根灌 湿润锋 水分运移 黄土坡地 |
Experiment on water migration of surge root irrigation in loess sloping fields |
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| Wang Youke,Li Penghong,Ma Lihui,Zhao Yingna,Li Pengjun.Experiment on water migration of surge root irrigation in loess sloping fields[J].Drainage and Irrigation Machinery,2010,28(5):449-454. | |
| Authors: | Wang Youke Li Penghong Ma Lihui Zhao Yingna Li Pengjun |
| Institution: | 1.College of Water Resources and Architectural Engineering,Northwest Agriculture and Forestry University,Yangling,Shaanxi 712100,China;2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,China;3.Chongqing Institute of Geology and Mineral Resources,Chongqing 400042,China;4.China National Petroleum Offshore Engineering Co.Ltd.,Tianjin 300451,China) |
| Abstract: | In order to know the water migration of a new micro-irrigation technique of surge root irrigation,different water migrations of surge root irrigation were studied by cross-sectional method under different hold diameters and depths in the wild loess sloping fields.The results show that under different hole diameters and depths,there are different influences on the horizontal diffusion radius,the upward infiltration distance and the downward infiltration depth of wetting front,and all of them have remarkable power rules with time;During 24 h after stopping surge root irrigation,the wetting front increased more than 47% relatively on horizontal and vertical diffusion,and the average moisture content of wetted volume decreased 30% relatively;After 24 h the wetting front diffused less and the moisture content decreased less.Therefore the design of surge root irrigation system can be established on the characteristic value of wetted volume on 24 h after stopping surge root irrigation,it will be proper when the hole depth is 30～40 cm and the hole diameter is of 6 cm.This research results can provide theory reference on application of the surge root irrigation technology. |
| Keywords: | surge root irrigation wetting front water migration loess sloping fields |
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