| 喷灌条件下土壤水分入渗的数学模拟 |
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| 引用本文： | 刘海军,龚时宏.喷灌条件下土壤水分入渗的数学模拟[J].灌溉排水学报,2006,25(2):15-19. |
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| 作者姓名： | 刘海军 龚时宏 |
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| 作者单位： | 中国农业大学,水利与土木工程学院,北京,100083;中国水利水电科学研究院,水利研究所,北京,100044 |
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| 基金项目： | 中国科学院资助项目;中国科学院陆地水循环及地表过程重点实验室基金 |
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| 摘 要： | 采用摇臂式喷头喷灌时,地表处于蒸发和入渗的交替变化过程。在室内模拟了单喷头喷洒时土壤水分的运移过程。试验结果显示,当上边界条件同时考虑蒸发和喷灌时,模拟的土壤水分分布与用平均喷灌强度模拟的结果相比更接近于实测的土壤水分,但是2种情况模拟的土壤水分分布区域一致。水量平衡计算显示,随着喷灌时间的增加,2种方法模拟的土壤含水量相差较小,逐渐接近实测值。
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| 关 键 词： | 喷灌 模拟 土壤水分 喷灌强度 |
| 文章编号： | 1000-646X(2006)02-0015-05 |
| 收稿时间： | 2005-11-29 |
| 修稿时间： | 2005年11月29 |
Modeling Soil Water Movement under Sprinkler Irrigation Condition |
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| LIU Hai-jun,GONG Shi-hong.Modeling Soil Water Movement under Sprinkler Irrigation Condition[J].Journal of Irrigation and Drainage,2006,25(2):15-19. |
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| Authors: | LIU Hai-jun GONG Shi-hong |
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| Institution: | 1. College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China; 2. China Institute of Water Resources and Hydropower Research, Department of Irrigation and Drainage, Beijing 100044, China |
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| Abstract: | Soil water evaporates and infiltrates in the same sprinkler rotating cycle when impact sprinkler is used.An experiment was conducted to model soil water movement under a single sprinkler at the experimental hall in Farmland Irrigation Research Institute.Two upper boundary conditions were used in the model,which is average sprinkler rate(A condition) and instantaneous sprinkler rate companied with soil evaporation(B condition).Results show that soil water content estimated using B condition was more close to the measured values in comparison with A condition.The depth of wet soil area estimated under both conditions was same.Soil water budget indicates that the difference in soil water amount between the measured and estimated using both conditions is small and decreases with sprinkler time increasing. |
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| Keywords: | sprinkler irrigation modeling soil water content sprinkler irrigation intensity |
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