| 土壤含水率对季节性冻土入渗特性影响的试验研究 |
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| 引用本文： | 郑秀清,樊贵盛.土壤含水率对季节性冻土入渗特性影响的试验研究[J].农业工程学报,2000,16(6):52-55. |
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| 作者姓名： | 郑秀清 樊贵盛 |
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| 作者单位： | 太原理工大学水利系 |
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| 基金项目： | 国家自然科学基金资助项目(59879014) |
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| 摘 要： | 基于季节性冻融期不同土壤含水率条件下的冬小麦田单点入渗试验，讨论了土壤含水率对冻融土壤水分入渗能力和入渗率的影响以及不同冻融阶段土壤入渗特性的变化。结果表明季节性冻融期土壤含水率对冻融土壤入渗特性的影响显著。土壤入渗能力随土壤含水率的升高而减小；冻融土壤累积入渗量随土壤含水率的变化符合幂函数规律；高土壤含水率导致的水力传导度减小是冻土入渗能力降低的主要原因。研究结果对于季节性冻土分布区农田冬春灌溉、确定合理灌水技术参数及水资源合理利用提供了参考。
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| 关 键 词： | 土壤含水率 季节性冻土 累积入渗量 水力传导度 |
| 收稿时间： | 2/9/1999 12:00:00 AM |
| 修稿时间： | 2000/6/25 0:00:00 |
Influence of Moisture Content on Infiltration Characteristics in Seasonal Frozen and Thawed Soils |
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| Zheng Xiuqing and Fan Guisheng.Influence of Moisture Content on Infiltration Characteristics in Seasonal Frozen and Thawed Soils[J].Transactions of the Chinese Society of Agricultural Engineering,2000,16(6):52-55. |
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| Authors: | Zheng Xiuqing and Fan Guisheng |
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| Abstract: | Based on the water infiltration in wheat field in winter and spring seasons, effects of moisture content on cumulative infiltration, infiltration rates, and the change of infiltration capacity during soil freezing and thawing were discussed in this paper. The results indicated that infiltration capacity of frozen and thawed soils decreased with the moisture content increased. The relationship between cumulative infiltration and soil moisture content conformed to power function law. The lower hydraulic conductivity of soils with higher moisture content was a major reason for lower infiltration capacity. It would be practical reference to determination of irrigation parameters and management of water resources. |
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| Keywords: | soil moisture content seasonal frozen soil cumulative infiltration capacity hydraulic conductivity |
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