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| 应用三次样条函数计算土壤水分扩散率 | |
| 引用本文： | 张俊,徐绍辉,刘建立,张佳宝. 应用三次样条函数计算土壤水分扩散率[J]. 土壤, 2006, 38(3): 338-341 |
| 作者姓名： | 张俊 徐绍辉 刘建立 张佳宝 |
| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008;中国科学院研究生院,北京,100049 2. 青岛大学环境科学与工程系,山东,青岛,266071 3. 中国科学院南京土壤研究所,南京,210008 |
| 基金项目： | 教育部科学技术研究项目;高比容电子铝箔的研究开发与应用项目 |
| 摘 要： | 采用三次样条函数计算土壤含水量分布,用土壤含水量分布计算土壤水分扩散率,并将其与Bruce 和Klute方法的结果进行比较,结果表明:除了土壤含水量在接近饱和时计算结果偏差较大外,采用三次样条函数得出的土壤水分扩散率与经典的Bruce和Klute方法结果接近。因此,三次样条函数法是计算土壤水分扩散率的一种简便可行的方法。 |
| 关 键 词： | 三次样条函数 水平入渗实验 土壤水分扩散率 |
Application of Cubic Spline Function to Calculation of Soil Water Diffusivity |
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| ZHANG Jun,XU Shao-hui,LIU Jian-li and ZHANG Jia-bao. Application of Cubic Spline Function to Calculation of Soil Water Diffusivity[J]. Soils, 2006, 38(3): 338-341 | |
| Authors: | ZHANG Jun XU Shao-hui LIU Jian-li ZHANG Jia-bao |
| Affiliation: | 1 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; 2 Department of Environmental Science and Engineering, Qingdao University, Qingdao , Shandong 266071, China; 3 Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | Cubic spline function was used to assess soil water distribution, and then further to calculate soil water diffusivity. From the experiments, it was found that the soil water diffusivity estimated with the method mentioned above was close to that obtained with the classic Bruce and Klute method except when soil water content was near saturation. The whole process could be done quickly with the aid of a computer program without the trouble of freehand drawing. Therefore, the method is a simple workable one for calculation of soil water diffusivity. |
| Keywords: | Cubic spline function Horizontal infiltration experiment Soil water diffusivity |
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