A perturbation solution of the nonlinear Boussinesq equation: The case of constant injection into a radial aquifer

Babu, 1976, Infiltration analysis and perturbation methods, 1. Absorption with exponential diffusivity, Water Resour. Res., 12, 89, 10.1029/WR012i001p00089 Babu, 1976, Infiltration analysis and perturbation methods, 2. Horizontal absorption, Water Resour. Res., 12, 1013, 10.1029/WR012i005p01013 Babu, 1976, Infiltration analysis and perturbation methods, 3. Vertical infiltration, Water Resour. Res., 12, 1019, 10.1029/WR012i005p01019 Babu, 1979, A similarity solution to a nonlinear diffusion equation of the singular type: a uniformly valid solution by perturbations, Q. Appl. Math., 37, 11, 10.1090/qam/530666 Babu, 1979, An initial value problem for the horizontal infiltration of water, Water Resour. Res., 15, 867, 10.1029/WR015i004p00867 Bear, 1972, Dynamics of Fluids in Porous Media, 764 Bear, 1968 Dass, 1974, Subsurface drainage solutions by Galerkin's method, 100, 1 Gureghian, 1978, Solutions of the Boussinesq equation for seepage flow, Water Resour. Res., 14, 231, 10.1029/WR014i002p00231 Maasland, 1963 Moody, 1966, Nonlinear differential equations of drain spacing, 92, 1 Skaggs, 1975, Drawdown solutions for simultaneous drainage and ET, 101, 279 Van Genuchten, 1978, Numerical solutions of the one-dimensional saturated-unsaturated flow equation, Civ. Eng., Princeton Univ., Princeton, N.J., Res. Rep. 78-WR-9 Van Schilfgaarde, 1963, Design of tile drainage for falling water tables, 89, 1 Van Schilfgaarde, 1964, Closure to “Design of tile drainage for falling water tables”, 90, 71 Zucker, 1973, Hydraulic studies using the Boussinesq equation with a recharge term, Water Resour. Res., 9, 586, 10.1029/WR009i003p00586