降雨及库水升降作用下地下水浸润线简化求解

降雨及库水的升降作用对边坡中地下水位的波动有直接影响,对此目前还没有较好的简便评价方法.为此,根据布西涅斯克潜水非稳定运动的基本微分方程,依据一定假设条件,通过拉普拉斯正变换和逆变换,求得了降雨及库水升降作用下土质岸坡坡体内浸润线预测的简化公式.该公式考虑了渗透系数、升降速度、给水度、含水层厚度、水位变幅及降雨强度的影响.同时,利用3D-Modflow程序进行了验证分析,结果显示该公式是可行的.

The simplified solution of phreatic saturation line under the actions of rainfall and reservoir water level fluctuation

It has been proved that the rainfall and reservoir water level fluctuation have a direct influence on the groundwater change.However,the influence has no unitized evaluation methods at present.Therefore,based on the Boussinesq's differential equation of unsteady phreatic water movement and according to certain assumed conditions and utilizing the Laplace positive and inverse variations,this paper achieves the simplified predictive formula of the saturation line of the soil bank slope influenced by rainfall and reservoir water level fluctuation.The simplified formula takes into account of the factors,such as permeability coefficient,velocity of fluctuation,specific yield,aquifer thickness,water level amplitude variation and rainfall intensity.At the same time,this paper still utilizes the 3D-Modflow procedure to check analysis,and the result shows that the simplified formula is feasible.