An Explicit Stabilized Runge–Kutta–Legendre Super Time-Stepping Scheme for the Richards Equation

Figure 2

Convergence of the methods (EXPL, RKL, IMPL, and CN): s = 20 in (a), s = 100 in (b), s = 50 in (c), and s = 35 in (d).

(a)

(b)

(c)

(d)