| 用薄层土蒸发数据计算获得萎蔫含水量和高基模吸力段持水曲线 |
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| 引用本文： | 薛绪掌,张仁铎,桂胜祥.用薄层土蒸发数据计算获得萎蔫含水量和高基模吸力段持水曲线[J].土壤通报,2002,33(2):100-104. |
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| 作者姓名： | 薛绪掌 张仁铎 桂胜祥 |
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| 作者单位： | 1. 国家农业信息化工程技术研究中心,北京,100089
2. University,of,Wyoming,Laramie,WY,82070,USA |
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| 摘 要： | 本研究对薄层土的含水量和薄层土所含水分的蒸发率的关系进行了理论分析 ,并在实验室测定了砂土、壤土、和粘壤土的薄层样品的水分蒸发过程。蒸发率迅速降低时的转折含水量被与压力锅法测定的萎蔫含水量相联系。薄层土蒸发数据还被用于计算高吸力段的持水曲线。vanGenuchten持水曲线模型经修改后可以很好拟合所计算的持水曲线数据
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| 关 键 词： | 萎蔫含水量 水分特征曲线 土壤水蒸发 |
| 文章编号： | 0564-3945(2002)02-00100-05 |
| 修稿时间： | 2000年9月9日 |
Applications of the Evaporation Process from Thin Soil Samples |
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| XUE Xu zhang ,ZHANG Ren duo ,GUI Sheng xiang.Applications of the Evaporation Process from Thin Soil Samples[J].Chinese Journal of Soil Science,2002,33(2):100-104. |
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| Authors: | XUE Xu zhang ZHANG Ren duo GUI Sheng xiang |
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| Institution: | XUE Xu zhang 1,ZHANG Ren duo 2,GUI Sheng xiang 2 |
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| Abstract: | In this study, the relationship between the evaporation rate and soil water content of sufficiently thin soil samples was analyzed theoretically and measured experimentally. The evaporation processes from thin samples of sand, clay loam, and loam soils were observed in the lab. The critical water content at which evaporation rate decreased was related to the permanent wilting point (-15 bar) measured with a pressure chamber. The evaporation data from the thin soil samples was used to calculate retention function at high matric suctions. The calculated retention functions were best fitted by a revised van Genuchten's retention |
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| Keywords: | Wilting coefficient Soil water characetristic Soil water evaporation |
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