Optimal Pipe Size Design for Looped Irrigation Water Supply System Using Harmony Search: Saemangeum Project Area

Table 8

Analysis results of the optimal and initial hydraulic designs (three cases).

Target water supply network		Nodal pressure head (m)				Pipe velocity (m/s)
		Min.	Max.	Avg.	Var.	Min.	Max.	Avg.	Var.
Loop type (plan 1)	Initial plan	17.65	31.66	23.04	13.95	0.01	1.92	0.97	0.16
	Optimal design	10.00	29.08	15.36	23.68	0.02	2.46	1.18	0.29
Branch type (plan 2)	Initial plan	10.45	31.66	21.24	23.55	0.09	2.22	1.11	0.09
	Optimal design	10.00	29.08	14.28	20.63	0.15	2.40	1.08	0.30
Pump type (plan 3)	Initial plan	0.5	30.79	25.17	10.63	0.07	1.89	0.95	0.06
	Optimal design	10.00	30.79	16.14	29.26	0.22	2.49	1.36	0.25