| 间歇供水对点源入渗土壤湿润体及水分分布的影响 |
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| 引用本文： | 张振华,蔡焕杰,杨润亚,王健. 间歇供水对点源入渗土壤湿润体及水分分布的影响[J]. 灌溉排水学报, 2004, 23(4): 29-32 |
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| 作者姓名： | 张振华 蔡焕杰 杨润亚 王健 |
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| 作者单位： | 烟台师范学院,地理与资源管理学院,山东,烟台,264025;西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 国家高技术研究发展计划项目(2002AA2Z4031)，烟台师范学院中青年自然科学基金项目(000444) |
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| 摘 要： | 对间歇供水和连续供水方式下的地表点源入渗进行了室内对比研究,得到以下初步的结果:2种供水方式下水平和垂向湿润锋与入渗时间均存在显著的幂函数关系;在灌水定额相同的条件下,采用大滴头流量(2L/h)间歇滴灌同采用小滴头流量(1L/h)连续滴灌相比较,间歇供水能有效增加水平与垂向湿润距离的比值;在连续供水条件下,土壤湿润体内平均含水率保持为一常量,而间歇供水处理的湿润体内平均含水率有一周期性的动态变化,供水期持续增大,在停水期降低接近于连续供水处理。
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| 关 键 词： | 间歇供水 点源入渗 入渗规律 |
| 文章编号： | 1000-646X(2004)04-0029-03 |
| 修稿时间： | 2004-05-14 |
The Influence of Intermittent Water Application by Point Source on Wetted Soil Volume and Soil Water Distribution |
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| ZHANG Zhen-hua,CAI Huan-jie,YANG Run-ya,WANG Jian. The Influence of Intermittent Water Application by Point Source on Wetted Soil Volume and Soil Water Distribution[J]. Journal of Irrigation and Drainage, 2004, 23(4): 29-32 |
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| Authors: | ZHANG Zhen-hua CAI Huan-jie YANG Run-ya WANG Jian |
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| Affiliation: | ZHANG Zhen-hua~1,CAI Huan-jie~2,YANG Run-ya~1,WANG Jian~2 |
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| Abstract: | Experiments about water infiltration into soils from an intermittent-application by surface point source were studied in the laboratory. The results showed that the relationship between horizontal and vertical wetting front and infiltration time was remarkable power function. Comparing with continuous water application, intermittent water application showed a clear advantage in reducing water infiltration in horizontal while still not significantly affecting the horizontal distribution. For continuum water application in the process of point source infiltration, the increased soil water content was a constant value for clay loam soil. For intermittent water, the increased soil water content keep a dynamic value. |
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| Keywords: | intermittent water application point-source irrigation infiltration patterns |
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