| 陈娟,庄水英,李凌.潮汐对地下水波动影响的数值模拟[J].水利学报,2006,37(5):630-633 |
| 潮汐对地下水波动影响的数值模拟 |
| Numerical modeling of tide-induced groundwater table fluctuations |
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| DOI： |
| 中文关键词: 地下水水位 潮汐 数值模型 超高 浸润面 |
| 英文关键词: groundwater table tide numerical simulation overheight seepage face |
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| 中文摘要: |
| 本文从经典的Boussinesq方程出发，在考虑浸润面影响的基础上，建立了基于有限差分法的滨海地区一维地下水运动数值模型。通过将潮汐运动概化为正弦波，模拟了滨海地区地下水水位随潮汐波动的变化。结果显示，地下水水位的波动相对于潮汐波动来说具有不对称性、振幅衰减以及相位滞后等特征。通过比较受潮汐影响的地下水平均水位与不考虑潮汐影响的地下水水位发现，实际的地下水平均水位要高于未考虑潮汐影响的地下水水位。最后数值模拟了浸润面的形成和消失的过程。 |
| 英文摘要: |
| The groundwater table in seashore area fluctuates under the action of tide. Based on the Boussinesq equation a 1_D numerical model, which can be solved by finite difference scheme is proposed for calculating the fluctuation of groundwater. The dynamic flow condition of seepage face at the seaward boundary is investigated. The groundwater table fluctuation following the sinusoidal varying tide level is numerically simulated. The result shows that, comparing with the variation of tide level, the fluctuation of groundwater table possesses the characteristics of amplitude attenuated, asymmetric and phase lagged. Due to the effects of beach slope and complicated dynamic flow condition of seepage face the period_averaged water table is higher than the steady_state water table, namely the overheight. The formation process of the seepage face after a tidal period is numerically simulated. |
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