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Calculation of Saturation Line of Groundwater under Reservoir Water Table Uniform Falling

It has been proved that the groundwater plays a key role in the stability of slope. It is important to determine the position of saturation line in the calculation of slope stability. Based on the basic differential equation of one dimension unsteady seepage flow, the calculation model is created with the uniform falling of reservoir water table, the counting equation by Laplace’s transform is deduced. It is easy to use the equation which is fitted by polynomial expression to get simplified formula. Simplifying the formula can satisfy the engineering precision requirement.