| 王旭升.可变给水度的潜水面运动方程[J].水利学报,2009,40(3): |
| 可变给水度的潜水面运动方程 |
| Equations of phreatic surface movement with variable specific yield |
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| DOI： |
| 中文关键词: 潜水面 Boussinesq方程 给水度 包气带 地下水模型 |
| 英文关键词: phreatic surface Boussinesq equation specific yield vadose zone groundwater modeling |
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| 摘要点击次数: 3489 |
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| 中文摘要: |
| 对Boussinesq方程进行修正，在地下水模型中考虑给水度的可变性，建立了可变给水度的潜水面运动方程。考虑包气带的水分存贮作用，提出了一个可变给水度潜水面运动方程的通式，使给水度的变化间接通过包气带吸力的变化特征来表现。通过引入简化的或经验的给水度变化模式，建立了基于完全给水度和基于Boulton滞后理论的潜水面运动方程。使用Hydrus2D程序模拟砂料的渗流槽试验以检验经改进的方程，结果表明基于完全给水度的方程显著改善计算结果，而基于Boulton滞后理论的结果与难以确定的滞后因子有关，且不一定能够反映实际滞后排水特性。 |
| 英文摘要: |
| The Boussinesq equation is modified to consider the variability of specific yield groundwater modeling. New equations are established for describing the phreatic surface movement.A general equation with the effect of water storage in vadose zone taken into account is developed.This equation expresses the relationship between the variability of specific yield and variation of matrix suction in vadose zone.Two types of equation，including the equation based on complete specific yield(depth dependent) and equation based on Boultons theory for delayed drainage，are developed，by introducing simplified or empirical consideration of variable specific yield.The validity of the modified equations is verified by the simulation of hypothesized sand tank test using Hydrus2D.The results indicate that the equation based on depth dependent specific yield can significantly enhance the calculation，but the equation based on Boutons theory is dependent on the uncertain delay factor and can not always represent the accurate delay patterns. |
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