| 阿拉尔绿洲灌区棉田土壤水分扩散率的测定 |
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| 引用本文： | 胡顺军,李修仓,田长彦,宋郁东.阿拉尔绿洲灌区棉田土壤水分扩散率的测定[J].干旱区地理,2009,32(6). |
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| 作者姓名： | 胡顺军 李修仓 田长彦 宋郁东 |
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| 作者单位： | 1. 中国科学院绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐,830011;中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011
2. 中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011 |
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| 基金项目： | 新疆维吾尔自治区科技攻关重大专项(20073117-3); 中国科学院知识创新工程重要方向项目(KZCX2-XB2-03); 国家自然科学基金(编号40471020); 中国科学院“西部之光”人才计划“联合学者” |
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| 摘 要： | 土壤水分扩散率是研究土壤水盐运动的重要参数之一。在室内用非稳定流水平土柱法对塔里木河流域阿拉尔绿洲灌区棉田土壤水分扩散率进行了测定。建立了Boltzmann变换参数、土壤水分扩散率与土壤含水率之间的定量关系。结果表明:土壤水分扩散率与土壤含水率呈单调递增关系。当土壤含水率趋近饱和含水率时,土壤水分扩散率趋近于无穷大。因此,用指数函数或幂函数不能很好地刻画土壤水分扩散系数与土壤的体积含水量之间的定量关系。本文建立的土壤水分扩散率与土壤含水率之间的函数关系较好地反映了土壤水分扩散系数与土壤的体积含水量之间的客观规律。
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| 关 键 词： | 土壤水扩散率 水平土柱法 Boltzmann变换 绿洲 |
Measurement of unsaturated soil water diffusivity in cotton field of Aral Oasis irrigated district |
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| HU Shun-jun,LI Xiu-chang,TIAN Chang-yan,SONG Yu-dong.Measurement of unsaturated soil water diffusivity in cotton field of Aral Oasis irrigated district[J].Arid Land Geography,2009,32(6). |
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| Authors: | HU Shun-jun LI Xiu-chang TIAN Chang-yan SONG Yu-dong |
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| Institution: | HU Shun-jun1,2,LI Xiu-chang2,TIAN Chang-yan1,SONG Yu-dong2(1 Key Laboratory of Oasis Ecology and Desert Environmental,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China,2 Xinjiang Institute of Ecology and Geography,China) |
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| Abstract: | Soil water movement parameters are necessary for the solution of the basic soil water movement equation.The unsaturated soil water diffusivity is one of the important parameters of studying soil water and salt movement.It is difficult to determine the unsaturated soil water diffusivity in the field.This paper describes the basic principle and method of determining soil water diffusivity by means of wet front advancing in a horizontal soil column in laboratory.The water diffusion processes and unsaturated so... |
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| Keywords: | soil water diffusivity horizontal soil column Boltzmann transformation |
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