When the system is confined well, the change of observation water level has a linear relation with water head change.
在系统封闭很好的情况下，观测水位的变化基本与水头的变化呈线性关系。
The nonlinear equation group expressed by infinite series was made up in the condition of different water level and recharge quantity on two lateral linear recharge boundary.
对于两侧直线补给边界水位和补给流量不同的情况，建立了无穷级数表达的非线性方程组；
A case study shows that nonlinear seepage exists in all the seepage area of the waste dump and the water level is higher than that of linear seepage.
计算结果表明，排土场渗流区普遍存在非线性渗流状态，计算出的非线性渗流水位较线性渗流水位高。
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