考虑外覆淤泥层弹性储水率的滨海承压含水层系统中海潮引起的水头波动

考虑了在海底有一定延伸的单层承压含水层系统,其海底延伸终端被一层与含水层性质不同的淤泥层所覆盖.前人给出了该系统忽略淤泥层的弹性储水情况下的解析解.本文给出了考虑淤泥层的弹性储水时的解析解.研究发现,如果淤泥层在水平方向的厚度很厚的时候,淤泥层的弹性储水对含水层内水位的变化的影响是显著的.在分析和预测含水层水头波动和水力性质之间关系的问题上,忽略淤泥层的弹性储水会带来较大的误差.

Tide-induced Head Fluctuations in a Coastal Aquifer: Effects of Elastic Storage and Leakage of Submarine Outlet-capping

This paper considers the tidal head fluctuations in a single coastal confined aquifer which extends under the sea for a certain distance.Its submarine outlet at the seafloor is covered by a silt-layer with properties dissimilar to the aquifer.Recently,previous researchers gave an analytical solution for such a system which neglected the effect of the elastic storage of the outlet-capping.This paper presents an analytical solution which generalizes their work by incorporating the elastic storage of the outlet-capping.It is found that if the outlet-capping is thick enough in horizontal direction,its elastic storage has significant enhancing effect on the tidal head fluctuation.Ignoring the elastic storage of the outlet-capping will lead to significant errors in predicting the relationship of the tidal head fluctuation and the aquifer hydrogeological properties.