Horizontal aquifer movement in a Theis-Thiem confined system
Horizontal aquifer movement in a Theis-Thiem confined system
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DOI：
10.1029/94wr00030
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发表时间：
1994-04
影响因子：
5.4
通讯作者：
D. C. Helm
中科院分区：
文献类型：
--
作者：
D. C. Helm
已知含水层的骨架基质向排水井横向移动。它相对于井移动的机制在过去仅被部分研究。对于假定的多孔弹性固体，检查压降与体积应变的关系是一种常用的方法。通过对比，本研究探讨了固体（含水层基质）的速度与水力驱动力的关系。本方法可以被认为是Darcian的，并允许直接计算含水层矩阵的位移场。一个新的制定达西Gersevanov定律的水流动相对于移动固体适用于Theis-Thiem承压含水层。含水层被发现开始时，最大的速度时，泵被打开，然后减速随着时间的推移。计算了骨架水平运动的无位移型曲线。根据（1）交替使用标准孔隙弹性应力-应变方法的结果和（2）瞬态地下水流的基本储存方程检查含水层变形的所得方程。
The skeletal matrix of an aquifer is known to move laterally toward a discharging well. The mechanisms by which it moves relative to the well have been only partially studied in the past. Examining the relation of drawdown to volume strain for an assumed poroelastic solid has been a common approach. By way of contrast, the present study examines the relation of the velocity of solids (aquifer matrix) to their hydraulic driving forces. The present approach can be considered Darcian and allows the displacement field of the aquifer matrix to be calculated directly. A new formulation of the Darcy-Gersevanov law of water flowing relative to moving solids is applied to a Theis-Thiem confined aquifer. The aquifer is found to start with a maximum velocity when the pump is turned on and then to decelerate as time progresses. Dimensionless type curves of horizontal movement of the skeletal matrix are calculated. The resulting equation of aquifer deformation is checked against (1) results from alternatively using the standard poroelastic stress-strain approach and (2) the fundamental storage equation for transient groundwater flow.