| 非饱和土壤渗透的快速数值计算 |
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| 引用本文： | 郭仁东 朴芬淑. 非饱和土壤渗透的快速数值计算[J]. 水科学进展, 1998, 9(3): 231-236 |
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| 作者姓名： | 郭仁东 朴芬淑 |
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| 作者单位： | 沈阳大学建筑工程系 沈阳110044 |
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| 基金项目： | 意大利卡拉布里亚大学合作项目 |
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| 摘 要： | 给出非饱和土壤渗透计算求解理查兹方程的有限差分法。该计算值与实测值吻合较好。这个方法使用了水土势双曲正弦变换的隐式差分格式。砂土、壤土及粘土范围内的渗透过程在微机上几十秒钟内即可被模拟出来,其误差很小。非饱和土壤的渗透特性可以划分为地表积水前、地表积水后及退水过程三种类型。
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| 关 键 词： | 非饱和土壤 理查兹方程 渗透 隐式迭代格式 双曲正弦变换 |
| 收稿时间： | 1997-02-24 |
Efficient Numerical Method for Infiltration in Unsaturated Soil |
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| Guo Rendong,Piao Fenshu. Efficient Numerical Method for Infiltration in Unsaturated Soil[J]. Advances in Water Science, 1998, 9(3): 231-236 |
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| Authors: | Guo Rendong Piao Fenshu |
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| Affiliation: | Dept. of Civil Engineering, Shenyang University, Shenyang 110044 |
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| Abstract: | A finite difference method for solving Richards' Equation in one dimension is presented, and the calculated results agree well with the observed data. The method is an implicit iterative scheme with a hyperbolic sine transform for the matrio potential.The infiltration in a range of soils for sand, silt loam and clay can be simulated in a few seconds on a personal computer with errors of only a few percent in the amount of soilwater. The beaviour of infiltration in unsaturated soil is divided into three phases: before ponding time, after ponding time and recession. |
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| Keywords: | unsaturated soil Richards’Equation infiltration implicit iterative scheme hyperbolic sine transform |
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