| 蒸发条件下一维垂向非饱和土壤水分运动的数值模拟——以额济纳荒漠河岸胡杨林为例 |
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| 引用本文： | 苏永红,朱高峰,冯起,司建华,常宗强.蒸发条件下一维垂向非饱和土壤水分运动的数值模拟——以额济纳荒漠河岸胡杨林为例[J].中国沙漠,2009,29(2):236-240. |
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| 作者姓名： | 苏永红 朱高峰 冯起 司建华 常宗强 |
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| 作者单位： | 1.中国科学院寒区旱区环境与工程研究所 寒旱区流域水文及应用生态实验室, 阿拉善荒漠生态-水文试验研究站, 甘肃 兰州 730000; 2.兰州交通大学数理与软件工程学院, 甘肃 兰州 730070 |
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| 基金项目： | 国家自然科学基金，国家社会科学基金，中国科学院西部行动计划 |
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| 摘 要： | 根据额济纳荒漠河岸胡杨林的实际土壤层结构,建立了带有根系吸水项的垂向一维土壤水分非饱和运动基本方程,并采用有限差分法对蒸发条件下土壤水分运动方程进行离散化,编制了用于该模型数值模拟的计算程序。最后通过数值模拟对模型进行验证,结果表明,模拟值与实测值能够较好吻合,模拟精度在92%~98%之间,能较好地反映土壤水分的运动规律,为研究土壤-植被-大气连续体（SPAC）水分运移提供理论基础。
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| 关 键 词： | 额济纳 土壤 水分运动 数值模型 |
| 收稿时间： | 2007-10-25 |
| 修稿时间： | 2007-11-27 |
Numerical Simulation of Vertical Soil Water Movement in Unsaturated Soils during Evaporation: A Case Study of Desert Riparian Populus euphratica Forest in Ejin |
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| SU Yong-hong,ZHU Gao-feng,FENG Qi,SI Jina-hua,CHANG Zong-qiang.Numerical Simulation of Vertical Soil Water Movement in Unsaturated Soils during Evaporation: A Case Study of Desert Riparian Populus euphratica Forest in Ejin[J].Journal of Desert Research,2009,29(2):236-240. |
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| Authors: | SU Yong-hong ZHU Gao-feng FENG Qi SI Jina-hua CHANG Zong-qiang |
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| Institution: | 1.Alashan Desert Eco-hydrology Experimental Research Station and Laboratory of Watershed Hydrology and Ecology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2.The School of Mathematics, Physics and Software Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China |
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| Abstract: | A mathematical model with a volumetric sink term (represent the water uptake by plant roots) is established to simulate the vertical one-dimensional soil water flow process in unsaturated zone based on the Richards' equation of soil water movement and according to the actual layer structure of desert riparian Populus euphratica forest in Ejin, Inner Mongolia. The finite difference method was used to discrete the soil water movement equation with evaporation boundary conditions, and the procedure for the numerical simulation of the model was programmed. The results showed that the simulation values were consistent well with the measurements with a precision ranging between 92% and 98%. This work supplies a theoretical basis for the study of water movement in the soil-plant-atmosphere continuum (SPAC). |
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| Keywords: | Ejin soil water movement numerical model |
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