| 张振华,蔡焕杰,王健,李庆志.间歇供水条件下点源入渗规律研究[J].干旱地区农业研究,2005,(1):50~53 |
| 间歇供水条件下点源入渗规律研究 |
| The effect of intermittent water administration by point source on infiltration patterns |
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| DOI：10.7606/j.issn.1000-7601.2005.01.09 |
| 中文关键词: 间歇供水 点源入渗 入渗规律 |
| 英文关键词:intermittent water administration point-source irrigation infiltration patterns |
| 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 |
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| 中文摘要: |
| 对间歇供水和连续供水方式下的杨凌粘壤土点源入渗进行了室内对比研究。结果表明:间歇供水地表点源入渗水平和竖直方向的最大入渗距离与入渗时间存在显著的幂函数关系;在灌水定额相同的条件下,大滴头流量(4L/h)间歇滴灌与小滴头流量(2L/h)连续滴灌相比较,间歇供水能有效增加水平湿润距离,同时垂向入渗距离降低15%;对应于同一灌水量,采用30min、60min和120min等3种间歇周期对点源入渗的水平和垂向入渗距离无明显影响。 |
| 英文摘要: |
| Previous studies on water infiltration into soil under a point-source dealt mainly with a continuous irrigation. Experiments about water infiltration into soil from intermittent-administration by surface point source were studied in the laboratory. The results showed that the relationship of horizontal and vertical wetting front with infiltration time was remarkable power function. Compared with continuous water adminstration, intermittent water adminstration showed a obvious advantage in reducing water infiltration in horizon(15%) while still not significantly affecting horizontal distribution. When the same total amount of water was used, it was found that the three intermittent cycles (30 min, 60 min, 120 min) did not affect horizontal and vertical wetting fronts. |
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