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Table 8

Comparison of estimated longitudinal dispersivity (m) values in various zones using DE, GA, PSO, and CSO

Data set	Zone	True values (m)	Estimated values using CSO (m)	Absolute % error CSO	Estimated values using PSO (m)	Absolute % error PSO	Estimated values using DE (m)	Absolute % error DE	Estimated values using GA (m)	Absolute % error GA
Data set 1	1	60	59.98	0.03	59.96	0.06	59.98	0.03	59.67	0.55
	2	60	59.96	0.07	59.93	0.12	59.96	0.07	59.18	1.37
	3	40	39.98	0.05	39.98	0.05	39.99	0.02	39.43	1.43
	4	60	59.99	0.02	59.96	0.07	59.98	0.03	59.50	0.83
	5	40	39.99	0.02	39.96	0.10	39.95	0.12	39.64	0.90
	6	15	14.98	0.13	14.84	1.07	14.99	0.07	14.63	2.47
	7	40	39.99	0.03	40	0.00	39.96	0.10	39.73	0.68
	8	15	15	0.00	14.97	0.20	14.94	0.40	14.87	0.87
	9	10	9.97	0.30	10	0.00	9.96	0.40	9.72	2.80
Data set 2: μ = 0, σ = 1	1	60	59.19	1.35	59.24	1.27	60.26	0.43	59.15	1.42
	2	60	59.64	0.60	59.43	0.95	59.53	0.78	59.53	0.78
	3	40	39.04	2.40	39.58	1.05	39.37	1.58	38.46	3.85
	4	60	59.72	0.47	59.29	1.18	59.79	0.35	59.06	1.57
	5	40	39.64	0.90	39.54	1.15	40.37	0.92	39.42	1.45
	6	15	14.72	1.87	14.62	2.53	14.66	2.27	14.37	4.20
	7	40	39.68	0.80	39.57	1.08	39.61	0.98	40.36	0.90
	8	15	14.45	3.67	14.39	4.07	14.5	3.33	14.22	5.20
	9	10	9.54	4.60	9.47	5.30	9.42	5.80	9.28	7.20

Data set	Zone	True values (m)	Estimated values using CSO (m)	Absolute % error CSO	Estimated values using PSO (m)	Absolute % error PSO	Estimated values using DE (m)	Absolute % error DE	Estimated values using GA (m)	Absolute % error GA
Data set 1	1	60	59.98	0.03	59.96	0.06	59.98	0.03	59.67	0.55
	2	60	59.96	0.07	59.93	0.12	59.96	0.07	59.18	1.37
	3	40	39.98	0.05	39.98	0.05	39.99	0.02	39.43	1.43
	4	60	59.99	0.02	59.96	0.07	59.98	0.03	59.50	0.83
	5	40	39.99	0.02	39.96	0.10	39.95	0.12	39.64	0.90
	6	15	14.98	0.13	14.84	1.07	14.99	0.07	14.63	2.47
	7	40	39.99	0.03	40	0.00	39.96	0.10	39.73	0.68
	8	15	15	0.00	14.97	0.20	14.94	0.40	14.87	0.87
	9	10	9.97	0.30	10	0.00	9.96	0.40	9.72	2.80
Data set 2: μ = 0, σ = 1	1	60	59.19	1.35	59.24	1.27	60.26	0.43	59.15	1.42
	2	60	59.64	0.60	59.43	0.95	59.53	0.78	59.53	0.78
	3	40	39.04	2.40	39.58	1.05	39.37	1.58	38.46	3.85
	4	60	59.72	0.47	59.29	1.18	59.79	0.35	59.06	1.57
	5	40	39.64	0.90	39.54	1.15	40.37	0.92	39.42	1.45
	6	15	14.72	1.87	14.62	2.53	14.66	2.27	14.37	4.20
	7	40	39.68	0.80	39.57	1.08	39.61	0.98	40.36	0.90
	8	15	14.45	3.67	14.39	4.07	14.5	3.33	14.22	5.20
	9	10	9.54	4.60	9.47	5.30	9.42	5.80	9.28	7.20