The generalized large well method is not applicable when the influence radius doesn't exit and the complicated hydrogeological condition is not fit to the condition of Dupuit well-flow formula.
但是当水文地质条件复杂，不能引用影响半径时，就不符合裘布依井流公式的适用条件，也就不能再用大井法计算排水量；
Spherical curvature radius was optimized through controlling the exit rays and using the automatic optimization function of optical design software.
通过对出射光线的控制，利用光学设计软件的自动优化功能，优化出满足条件的球面曲率半径。
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