Analytical Solution for Tidal Propagation in a Leaky Aquifer Extending Finite Distance under the Sea
Analytical Solution for Tidal Propagation in a Leaky Aquifer Extending Finite Distance under the Sea
复制标题
DOI：
10.1061/(asce)0733-9429(2008)134:4(447
复制
发表时间：
2008-04
影响因子：
2.4
通讯作者：
M. Chuang;H. Yeh
中科院分区：
文献类型：
--
作者：
M. Chuang;H. Yeh
本文研究了沿海含水层系统中潮汐波动对地下水动力学的响应。导出了在海底延伸有限距离的渗漏含水层中地下水位波动的解析解。在此解的基础上，可以较全面地分析地下水位波动的动力效应、内陆和近海渗漏等各参数对有漏承压含水层内陆部分地下水位波动行为的共同影响。随着顶板长度的增加，地下水位波动对无承压含水层无因次地下水振幅、侵入距离和固定相移的动态影响更为重要，当顶板长度大于某一阈值时，地下水位波动趋于恒定值。而在相同的无因次渗漏量和顶板长度下，考虑动力效应的地下水无因次振幅、侵入距离和固定相移总是大于忽略动力效应的结果。
This paper focuses on groundwater dynamics in response to the tidal fluctuation in a coastal aquifer system. An analytical solution is derived to describe groundwater level fluctuation in a leaky aquifer extending finite distance under the sea. Based on this solution, the joint effects of various parameters, such as the dynamic effect of water table fluctuation and the leakages of the inland and offshore, on the behavior of the groundwater level fluctuations in the inland part of the leaky confined aquifer can be thoroughly analyzed. When the roof length is increased, the dynamic effect of the water table fluctuation on the dimensionless groundwater amplitude, intrusion distance, and fixed phase shift in the unconfined aquifer become more important and the water table fluctuation approaches constant values when the roof length is greater than a threshold value. However, given the same values of dimensionless leakage and roof length, the dimensionless groundwater amplitude, intrusion distance, and fixed phase shift in the leaky aquifer with considering the dynamic effects are always larger than those of neglecting such effects.