| 杨艳,王全九,樊军,赵军.利用同一土柱测定土壤水分和保守性溶质运移参数[J].水利学报,2007,38(1):120-126 |
| 利用同一土柱测定土壤水分和保守性溶质运移参数 |
| Method for determining soil water and solute transport parameters using one soil column |
| 投稿时间：2006-02-13 |
| DOI： |
| 中文关键词: 非饱和土壤 水分扩散率 溶质锋 边界层理论 土壤溶质运移参数 |
| 英文关键词: unsaturated soil water diffusivity solute front boundary layer theory soil solute transport parameters |
| 基金项目:中科院"百人计划"项目(2004109);国家自然科学基金(40371057);教育部博士点基金 |
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| 中文摘要: |
| 利用数学模型预测土壤水分和溶质运移过程的准确性取决于所涉及的水力参数和土壤溶质运移参数的可靠性和精度。目前由于实验系统和研究方法的限制，在测定水力参数和溶质运移参数时所采用的土壤样本不一致，产生了样本误差。本文建立了利用同一土壤样本测定水力参数和溶质运移参数方法，即首先进行水平一维入渗实验，待土壤饱和后改换为供溶液试验，测定土壤边界层随时间的变化过程从而计算出溶质运移参数。与传统的利用土壤溶质穿透曲线获得参数的方法比较表明，本文提出的方法是可行的。 |
| 英文摘要: |
| The accuracy of predicted soil water and solute transport process by mathematical model depends on the validity and accuracy of relevant hydraulic parameters and solute transport parameters obtained from calibrating tests. The measurement error may occur due the soil sample for determining the hydraulic parameters is always not the same sample for determining the solute transport parameters. In this paper a method for determining the soil water and solute transport parameters using one soil column is proposed. Firstly, the soil sample is used to carry out the 1 D in filtration test for obtaining the hydraulic parameters. When the soil is saturated, the sample is utilized to implement the solute transport test. The variation process of the boundary layer is recorded and the transport parameters can be calculated. The comparison with the result from traditional method shows that the proposed method is feasible. |
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