近岸地下水位波动数值研究

近岸海水与潜水含水层之间存在着密切的水力联系.近岸含水层水位随潮水的波动而波动,同时还与海水之间发生着水量交换.因此海水与地下水之间是一个相互联系的整体.本文建立平面二维潜水含水层与海水耦合数值模型,并通过结果分析近岸潜水水位波动特点.结果表明,随着岸上离海岸距离的增加,地下水位波动存在着相位差和振幅衰减,并且水位上升速度较快.

Research on Fluctuation Numerical of Groundwater Level Near The Coast

There is a closely hydraulic relationship between the seawater and the unconfined aquifer near the coast. The water table of the unconfined aquifer near the coast fluctuates following the tide movement, the aquifer also exchanges water with the sea. Therefore, the seawater and the underground water can be considered as an interactional one. The article establishes a two-dimensional horizontal simulation model that combines the unconfined aquifer and the seawater coupling value and analyzes fluctuation features of the ground water level near the coast. The result shows that the fluctuation of groundwater level exist the phase difference and the amplitude attenuation characters by the landward distance from the coast increasing. And the water table also increases faster while the distance increases.