前言在处理有自由面的土坝和土堤的稳定渗流时,土木工程师一直是依赖流网图解法(卡萨格兰德(Casagrande,194),P.295),塞德格伦(Cedergren,1967)]。在分析向无压含水层中的井的流动时,地下水力学者们常常以杜布衣假定作为他们的理论依据。已发展了处理上述问题的精确解析法,但往往难以应用。最近,这些 Foreword When dealing with the stable seepage of free-faced earth dams and earth embankments, civil engineers have always relied on drift-net diagrams (Casagrande (194), p. 295), Cedergren, 1967)]. In analyzing the flow of wells into an unpressurized aquifer, groundwater mechanics often use the Dubuy hypothesis as their theoretical basis. Accurate analytical methods that deal with the above problems have been developed but are often difficult to apply. Recently, these