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

Table 1

Timing of four methods.

s	EXPL	RKL	IMPL	CN
5	33.14	15.40	101.23	101.25
10	32.66	8.26	28.18	28.34
20	32.69	4.79	8.41	8.29
25	33.04	4.31	5.92	6.05
30	32.80	3.69	4.44	4.55
35	32.76	3.27	3.60	3.62
40	32.80	3.17	3.08	3.12
45	32.75	2.99	2.67	2.85
50	32.60	2.84	2.41	2.53
55	32.68	2.64	2.22	2.34
60	32.83	2.44	2.08	2.00
65	32.87	2.48	1.89	2.05
80	32.81	2.21	1.68	1.53
100	32.77	2.45	1.57	1.71