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Excess pore water pressure due to ground surface erosion

机译:地面侵蚀导致孔隙水压力过大

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摘要

The Laplace transform is applied to solve the groundwater flow equation with a boundary that is initially fixed but that starts to move at a constant rate after some fixed time. This problem arises in the study of pore water pressures due to erosional unloading where the aquifer lies underneath an unsaturated zone. We derive an analytic solution and examine the predicted pressure profiles and boundary fluxes. We calculate the negative pore water pressure in the aquifer induced by the initial erosion of the unsaturated zone and subsequent erosion of the aquifer.
机译:应用拉普拉斯变换来求解地下水流动方程,该边界最初是固定的,但在一定的固定时间后开始以恒定的速率运动。在研究孔隙水压力时,由于含水层位于非饱和区下面的冲蚀卸载而产生了这个问题。我们得出一个解析解并检查预测的压力曲线和边界通量。我们计算了不饱和区的初始侵蚀和含水层的后续侵蚀引起的含水层中的负孔隙水压力。

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